@vegmatic1966 using the circuit a did a couple mods (im putting it together in a project) which include a scrap 7806 voltage regulator, 12V 9.4A power supply, 5k pots, and irf 840. how many amps does yours draw? i got much bigger (noisy) arks from 12V 1A power wart (not using the open 9A power supply yet, its all exposed). what about a neon lamp instead of a capacitor?
@powermaks Not sure on max current, maybe 1.5 amps. This was 2 years ago so I forget the details. A neon lamp has too low of voltage - a proper snubber circuit tuned so the peak voltage is about 75% of the mosfet's max voltage is best.
@HighVoltageProjects Sounds like you may be over driving it. CRT flybacks aren't meant for large power. Arcing at the pins can kill your driver components.
hi im really sorry , but iv built this 3 times now and spent a day goin ova and ova them ,the fet stays cold ,the timer gets hot and there is no spark.iv tried winding the primary the other way too and running the timer from a different power source ,do you have and suggestions? could i try it with a speaker instead of a flyback to make sure its not dead .I thought after building a tesla coil that this would be easy but NO so well done.lol.sorry and thanks again.
hi sorry. last one i hope.i take it that AF is the + audio in but where does the - audio go i take it to ground but didnt want to blow my mini disk player thanks and sorry again .
hi sorry for all the questions ,please could you tell me .how many volts the 470uf electrolytic needs to be .also how many amps is needed for the power supply and finally are both the 12v positive supplied from the same source.thanks again .cant wait to build this . great project
@HighVoltageProjects No. The 3055 tends to get damaged by the flyback pulses on the primary side. You could use a stronger snubber, but will lose output voltage. I strongly recommend a high voltage mosfet of 200 volts or more. They are easy for the 555 to drive.
@HighVoltageProjects No. The 3055 tends to get damaged by the flyback pulses on the primary side. You could use a stronger snubber, but will lose output voltage. I strongly recommend a high voltage mosfet of 200 volts or more. They are easy for the 555 to drive.
@vegmatic1966 It needs a reverse connected diode across it. The flyback pulses will go through it and help the magnetic field collapse more quickly instead of going through the 2N3055. CRT TVs and monitors use that setup to save the horizontal output transistor and help the high voltage generation.
@Nivicoman MOSFETS have the reverse diode inside to conduct the big negative going pulse which helps with output. There is still a large positive going pulse that can reach several hundred volts. This pulse should be snubberized just to the point that its peak voltage must not exceed that of the transistor's max voltage rating. It should not be reduced much more or the arc will be weak. The 3055 Vce is not high enough to be a good choice for these circuits. MOSFETS are easier to drive.
@Nivicoman Ah yes forgot about snubber networks. The ones I see in UPS inverters are a simple RC affair sometimes with a properly rated GMOV across that to grab the excess pulse amplitude. In your opinion would IGBTs would work in the singing arc better than a MOSFET? The majority of the UPS's I see have IGBTs with the built in reverse (flyback) diode . Only the smaller ones use MOSFETS again with built in flyback diodes. All our models work in PWM mode not linear sinewave.
@Nivicoman I've not tried an IGBT, but don't see why it wouldn't work. They are expensive and really not necessary for driving a TV flyback when a properly set up MOSFET circuit will work fine.
Could someone put a diode in reverse bias to the primary winding of the transformer to keep the discharge of the inductor from causing damage to the circuit? Would this cause the audio to be bad or anything?
@mondays89 MOSFETS already have an internal reverse bias diode that acts as a damper diode to conduct the reverse pulse. A snubber tames the flyback pulse as well.
hi, i have made a very similar circuit to this, the differences are that i ve omitted several components and change some values, while using power MOSFET IRF 840, and a common transformer i found in battery charger. I inputted 12 VDC and it gave me about 1.8kV purple spark of 2mm length. What intrigued me is that why the collector to emitter voltage i ve was TWICE THE SUPPLY VOLT? DO you have any theoretical explanation for that? Many thanks for your help.
@hulago1234 I assume you mean drain to source voltage as MOSFETS don't have collectors and emitters. Anyway, this is normal because the rapidly collapsing magnetic field in the coil produces a high voltage on the transistor. This is why you need such a high voltage rated transistor. If your circuit was working properly, you could see 200 volts or more peak across the drain and source. A properly designed snubber will help keep that flyback voltage under control. Just don't snub too much.
Can you link up a text version of what you said? I find it hard to understand someone talking and like to read it. If so thanks :D also have you been able to create a larger arc? one that would be easily used in a room such as a lounge room? or would i just have to experiment a bit with the voltage and the coils?
So how reliable is this circuit? do you go through a lot of FETs, I have irf 640 and some others but any opinion on this one. I have fan+heatsink on this.
I see that in your vid, you at one point wound the flyback primary yourself, do you notice any improvement when using flybacks primary? Also, I dont know where you got your flyback from, maybe a crt? To determine the best oscillation frequency and resitance values i used the horizontal scan rate of my old crt computer monitor.
@plato147 That FET should work fine. be sure to use a snubber network across the primary to reduce the flyback "kick" that can force the transistor into conduction and possibly damage it. You really need a scope to monitor the flyback waveform on the primary coil and set the snubber so the pulse voltage goes no higher than 75% of the FETs max drain to source voltage. I haven't killed ant FETs yet ;-)
@vegmatic1966 ok, thanks for the instructions.the 555 is in astable mode, the output signal freq that will be amplitude modulated (follows audio) is set by R1 R2 and C, in your schematic, R1=3K, R2=2.2K and C=0.01uF. this makes your output oscilation freq about 19.5kHz. Say for example this is a crt flyback that usually operates around 30-60kHz, would it not be better to set the oscilation frequency higher? matched with the flyback? maybe it would work even better set outside audio band >20kHz
I have a question, did you have to make your own primary winding? If so please tell me what kind of wire you used (dont know how thick "xx" gauge is, so that confuses me), also, if you did, how many turns was it and how do you do it? I've heard that some people do need to do that to the flyback transformer, but dont explain it.
@CoolDudeClem I found a pair of taps that worked for me. If you wind it, 24 or 22 gauge is fine unless you are pushing heavy current. Without knowing the transformer characteristics, you have to experiment to find the number of turns. Too few and your driver can overheat, too many and the current draw is very small and arc is weak. With DC HV outputs remember to check polarity for the biggest arcs. Use a transformer with HV AC output if you want to make singing arcs.
ok so i built it exactly how you have yours except i used a 12 volt power supply from a computer instead and i cant get an arc, its more of just a spark but the flyback emits a very high fdrequency and i can't figure out what is wrong?? oh and my 555 timer gets very hot?
ok so i built it exactly how you have yours except i used a 12 volt power supply from a computer instead and i cant get an arc, its more of just a spark but the flyback emits a very high frequency and i can't figure out what is wrong?? oh and my 555 timer gets very hot?
ok so i built it exactly how you have yours except i used a 12 volt power supply from a computer instead and i cant get an arc, its more of just a spark but the flyback emits a very high frequency and i can't figure out what is wrong?? oh and my 555 timer gets very hot?
ok so i built it exactly how you have yours except i used a 12 volt power supply from a computer instead and i cant get an arc, its more of just a spark but the flyback emits a very high frequency and i can't figure out what is wrong?? oh and my 555 timer gets very hot?
I'm currently making one to run off a media player, but I'm a fairly amateur electrical engineer hobbyist, and getting parts in my town can be a pain, so it's been slow... XD
Learned a lot in the process though! All that truly matters.
@qwertyboy1234567899 I'm not trying to make a high voltage anything. I searched the web, and found nothing to tell me just what a Vcc is. So, I decided to ask people on youtube, trusting that someone would be nice enough to respond.
Why I chose this one, idk, i just did. It has electronics in it way above my level, so some should be able to answer my question right?
@powermaks No, the collector to emitter voltage is too low that the flyback spike with force the transistor to conduct which may ruin it or weaken the output. You will need to modify the 555 driver as well. A MOSFET is a much simpler solution. Always use a MOSFET of 250 volts or more. MOSFETs have the internal diode as well. I don't know if an ignition could would work at the high frequencies needed.
@vegmatic1966 if the transistor available at the shack? i now got around to making it. also, how much amps does it draw? at 12V does the 555 chip fail?
Just thinking, If you could adjust the duty cycle of the 555 and then set the two electrodes from the flyback transformer output, could you make a Jacob's ladder? If you had a stepper circuit to adjust the 555's duty cycle?
i made the circuit, but i'm having trouble with the audio input and when i use my ac current reader it reads ac current out of pin 3 and 4 and to ground. shouldn't the pulses come out of pin 3 only and ground.
how do you connect a cd player to the circut also how do you hook up the power to both areas where it calls for it I am new at this so please help me.can you show a video of your singing art circut so I can compare mine with you
You will need to learn how to read schematics. That is the best way to understand this stuff. Too many people want to understand electronics overnight. It takes practice and lots of learning.
@vegmatic1966 well said and very true, but whats great is you get a lot of little successes that keep motivating you forward to achieve more and more. I mean i remember my first circuits, even if it was just a lightbulb, then you made it blink , then you added another, etc....Then maybe some day one will only be limited by their imagination and creativity. thanks again. and wish you all the best in your endeavours.
@7577357 Connect the CD output ground to circuit ground and connect the audio output from the CD player to 555 pin 5 through a .47uF capacitor, along with a .01uF capacitor from pin 5 to ground.
in the schematic there is only a capacitor across the fet, adding a resistor in series with it will make a proper snubber thus much better filtering. see the document i referred to for the calculations.
@darkthero make sure you have adequate capacitors, and keep your flyback away from the PCB. also add a snubber circuit for the mosfet as i don't see one. the lack of a snubber is what's probably killing your 555.
for things such as a strobe or bike light, you can get away without a snubber. in this case it is required.
@darkthero don't worry, i wasn't familiar with the term a few months ago either.
yes it is a filter, and it is designed to damp the "ringing" (self-oscillating) inside a circuit. when you go in the hundreds of kHz and higher one of those can really make the difference between a device that works and one that doesn't, as i found out with my first simple SMPS project.
google for "calculating optimum snubbers", hit the first link and you got it all explained there.
What do you think of using class AB MOSFET amp instead of using class E topology? I mean you can still use 555 as your modulator flowed by a high voltage op-amp such as OPA452, OPA453, OPA454 that can amplify the signal to 78Vpp. This 78Vpp AM signal is than fed into CLASS AB MOSFET amp. I wonder what the result of that be?
I also build the speaker. The sound is VERRY good, but the arc is verry short (about 1 cm long). I use AC flyback transformer from an old russian TV (mark "Rubin"). There are 1100 turns in the secundary coil and minimum 24 turns in the primary coil, because if I wind less than 23 turns, the transistor gets hot. And there is one strange effect - if I set the voltage higher than 24 V or I set the current bigger than 1,6 A, the sound gets mute. Please help me!
Are you supplying the 555 separate from the MOSFET? The 555 may not function right or be damaged if you exceed 18 volts. Drive the 555 at 12 volts and the MOSFET at 24 volts to see what happens. Use a common ground, of course. Beyond that, you really need to scope the waveforms to see what is happening.
Yes, maybe the decision is to supply the timer with 12 Volts. But I read in one book the power supply for the 555 may be from 4.5 to 30 Volts. Now I'm going to use 2 power suppliers x 12 Volts, 8 Ampers. Then the voltage for the 555 timer will be 12 Volts and for the transformer - 24 Volts. Also I want to scope the signal, but I haven't got an oscciloscope, hope one of my friends give me his own :)
Using a HV transformer with AC output should work the best. Parasitic capacitance in the output lead tends to spoil the effect. Keeping the output lead very short may help. Without drawing an arc, current should be well under 500ma. Primary winding impedance is too low if unloaded current is high.
@vegmatic1966 using the circuit a did a couple mods (im putting it together in a project) which include a scrap 7806 voltage regulator, 12V 9.4A power supply, 5k pots, and irf 840. how many amps does yours draw? i got much bigger (noisy) arks from 12V 1A power wart (not using the open 9A power supply yet, its all exposed). what about a neon lamp instead of a capacitor?
powermaks 3 weeks ago
@powermaks Not sure on max current, maybe 1.5 amps. This was 2 years ago so I forget the details. A neon lamp has too low of voltage - a proper snubber circuit tuned so the peak voltage is about 75% of the mosfet's max voltage is best.
vegmatic1966 3 weeks ago
TOUCH THE ELECTRIC ARC! THAT'S HOW YOU FEEL THE MUSIC!
friedman1962 4 weeks ago
can make some cool headphones with it, and after you listen some electronic music
Khurzable 1 month ago
I wish my MOSFET's stayed cool, they always get hot fast with 555 based drivers.
Alex1M6 4 months ago
@HighVoltageProjects Sounds like you may be over driving it. CRT flybacks aren't meant for large power. Arcing at the pins can kill your driver components.
vegmatic1966 5 months ago
hi im really sorry , but iv built this 3 times now and spent a day goin ova and ova them ,the fet stays cold ,the timer gets hot and there is no spark.iv tried winding the primary the other way too and running the timer from a different power source ,do you have and suggestions? could i try it with a speaker instead of a flyback to make sure its not dead .I thought after building a tesla coil that this would be easy but NO so well done.lol.sorry and thanks again.
HighVoltageProjects 5 months ago
hi sorry. last one i hope.i take it that AF is the + audio in but where does the - audio go i take it to ground but didnt want to blow my mini disk player thanks and sorry again .
HighVoltageProjects 5 months ago
@HighVoltageProjects Connect audio minus (-) to ground (power supply negative side) of the 555.
vegmatic1966 5 months ago
hi sorry for all the questions ,please could you tell me .how many volts the 470uf electrolytic needs to be .also how many amps is needed for the power supply and finally are both the 12v positive supplied from the same source.thanks again .cant wait to build this . great project
HighVoltageProjects 5 months ago
ok thanks ill give this ago ,farnell are gonna love me.
HighVoltageProjects 5 months ago
hi could you use a power transistor (2n3055) in this as i'm fed-up of buying fet's and have a few 2n3055 's thanks and nice project
HighVoltageProjects 5 months ago
@HighVoltageProjects No. The 3055 tends to get damaged by the flyback pulses on the primary side. You could use a stronger snubber, but will lose output voltage. I strongly recommend a high voltage mosfet of 200 volts or more. They are easy for the 555 to drive.
vegmatic1966 5 months ago
@HighVoltageProjects No. The 3055 tends to get damaged by the flyback pulses on the primary side. You could use a stronger snubber, but will lose output voltage. I strongly recommend a high voltage mosfet of 200 volts or more. They are easy for the 555 to drive.
vegmatic1966 5 months ago
@vegmatic1966 It needs a reverse connected diode across it. The flyback pulses will go through it and help the magnetic field collapse more quickly instead of going through the 2N3055. CRT TVs and monitors use that setup to save the horizontal output transistor and help the high voltage generation.
Nivicoman 4 months ago
@Nivicoman MOSFETS have the reverse diode inside to conduct the big negative going pulse which helps with output. There is still a large positive going pulse that can reach several hundred volts. This pulse should be snubberized just to the point that its peak voltage must not exceed that of the transistor's max voltage rating. It should not be reduced much more or the arc will be weak. The 3055 Vce is not high enough to be a good choice for these circuits. MOSFETS are easier to drive.
vegmatic1966 4 months ago
@Nivicoman Ah yes forgot about snubber networks. The ones I see in UPS inverters are a simple RC affair sometimes with a properly rated GMOV across that to grab the excess pulse amplitude. In your opinion would IGBTs would work in the singing arc better than a MOSFET? The majority of the UPS's I see have IGBTs with the built in reverse (flyback) diode . Only the smaller ones use MOSFETS again with built in flyback diodes. All our models work in PWM mode not linear sinewave.
Nivicoman 4 months ago
@Nivicoman I've not tried an IGBT, but don't see why it wouldn't work. They are expensive and really not necessary for driving a TV flyback when a properly set up MOSFET circuit will work fine.
vegmatic1966 4 months ago
0.1uf is a 103 ceramic cap?
lilletizz 5 months ago
@lilletizz 104 103 is only 10 nF, maybe you made a mistake but incase you didnt know the last number is the ammount of 0's exept for 8=0.01 and 9=0.1
snareNL 5 months ago
@snareNL
I remembered it not long after I posted the comment :P, but thanks ^^
The circuit works awesome! Even tho I use a smaller MOSFET, a IRL510 so it get's kinda hot very fast.
lilletizz 5 months ago
Could someone put a diode in reverse bias to the primary winding of the transformer to keep the discharge of the inductor from causing damage to the circuit? Would this cause the audio to be bad or anything?
mondays89 7 months ago
@mondays89 MOSFETS already have an internal reverse bias diode that acts as a damper diode to conduct the reverse pulse. A snubber tames the flyback pulse as well.
vegmatic1966 7 months ago
hi, i have made a very similar circuit to this, the differences are that i ve omitted several components and change some values, while using power MOSFET IRF 840, and a common transformer i found in battery charger. I inputted 12 VDC and it gave me about 1.8kV purple spark of 2mm length. What intrigued me is that why the collector to emitter voltage i ve was TWICE THE SUPPLY VOLT? DO you have any theoretical explanation for that? Many thanks for your help.
hulago1234 7 months ago
@hulago1234 I assume you mean drain to source voltage as MOSFETS don't have collectors and emitters. Anyway, this is normal because the rapidly collapsing magnetic field in the coil produces a high voltage on the transistor. This is why you need such a high voltage rated transistor. If your circuit was working properly, you could see 200 volts or more peak across the drain and source. A properly designed snubber will help keep that flyback voltage under control. Just don't snub too much.
vegmatic1966 7 months ago
Will a IRF820 work?
DYLAN102001 7 months ago
@DYLAN102001 Datasheet shows a pretty high onstate resistance of 3 ohms. It is not the best for this circuit.
vegmatic1966 7 months ago
@vegmatic1966 Is it possible to amplitude-modulate the carrier signal instead of pulse-with modulate?
DYLAN102001 7 months ago
@DYLAN102001 You would have to modulate the power supply voltage to the mosfet with the audio. Don't know how it would sound.
vegmatic1966 7 months ago
@vegmatic1966 one more thing, is this circuit like a class D amplifier?
DYLAN102001 7 months ago
@DYLAN102001 Yes
vegmatic1966 7 months ago
where did you find your 3K resistor. it must be rare because its bot in my junk box nor ant radioshack
powermaks 8 months ago
Can you link up a text version of what you said? I find it hard to understand someone talking and like to read it. If so thanks :D also have you been able to create a larger arc? one that would be easily used in a room such as a lounge room? or would i just have to experiment a bit with the voltage and the coils?
ParkourJayy 10 months ago
did you have fun? any thoughts of integrating with midrange and low freq drivers, you know using this only as a tweeter part in a speaker?
plato147 11 months ago
So how reliable is this circuit? do you go through a lot of FETs, I have irf 640 and some others but any opinion on this one. I have fan+heatsink on this.
I see that in your vid, you at one point wound the flyback primary yourself, do you notice any improvement when using flybacks primary? Also, I dont know where you got your flyback from, maybe a crt? To determine the best oscillation frequency and resitance values i used the horizontal scan rate of my old crt computer monitor.
plato147 11 months ago
@plato147 That FET should work fine. be sure to use a snubber network across the primary to reduce the flyback "kick" that can force the transistor into conduction and possibly damage it. You really need a scope to monitor the flyback waveform on the primary coil and set the snubber so the pulse voltage goes no higher than 75% of the FETs max drain to source voltage. I haven't killed ant FETs yet ;-)
vegmatic1966 11 months ago
@vegmatic1966 ok, thanks for the instructions.the 555 is in astable mode, the output signal freq that will be amplitude modulated (follows audio) is set by R1 R2 and C, in your schematic, R1=3K, R2=2.2K and C=0.01uF. this makes your output oscilation freq about 19.5kHz. Say for example this is a crt flyback that usually operates around 30-60kHz, would it not be better to set the oscilation frequency higher? matched with the flyback? maybe it would work even better set outside audio band >20kHz
plato147 11 months ago
I have a question, did you have to make your own primary winding? If so please tell me what kind of wire you used (dont know how thick "xx" gauge is, so that confuses me), also, if you did, how many turns was it and how do you do it? I've heard that some people do need to do that to the flyback transformer, but dont explain it.
CoolDudeClem 11 months ago
@CoolDudeClem I found a pair of taps that worked for me. If you wind it, 24 or 22 gauge is fine unless you are pushing heavy current. Without knowing the transformer characteristics, you have to experiment to find the number of turns. Too few and your driver can overheat, too many and the current draw is very small and arc is weak. With DC HV outputs remember to check polarity for the biggest arcs. Use a transformer with HV AC output if you want to make singing arcs.
vegmatic1966 11 months ago
Did you wind your own primary or use the existing one?
If you wound your own, how many turns with what type of wire did you use?
rjpope42 11 months ago
@rjpope42
I'm asking because I attempted this with 10 turns of 20ga magnet wire and a 12V motorcycle battery and it got really hot, really fast.
rjpope42 11 months ago
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ok so i built it exactly how you have yours except i used a 12 volt power supply from a computer instead and i cant get an arc, its more of just a spark but the flyback emits a very high fdrequency and i can't figure out what is wrong?? oh and my 555 timer gets very hot?
MrChipSkylark 11 months ago
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ok so i built it exactly how you have yours except i used a 12 volt power supply from a computer instead and i cant get an arc, its more of just a spark but the flyback emits a very high frequency and i can't figure out what is wrong?? oh and my 555 timer gets very hot?
MrChipSkylark 11 months ago
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ok so i built it exactly how you have yours except i used a 12 volt power supply from a computer instead and i cant get an arc, its more of just a spark but the flyback emits a very high frequency and i can't figure out what is wrong?? oh and my 555 timer gets very hot?
MrChipSkylark 11 months ago
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ok so i built it exactly how you have yours except i used a 12 volt power supply from a computer instead and i cant get an arc, its more of just a spark but the flyback emits a very high frequency and i can't figure out what is wrong?? oh and my 555 timer gets very hot?
MrChipSkylark 11 months ago
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MrChipSkylark 11 months ago
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MrChipSkylark 11 months ago
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MrChipSkylark 11 months ago
Very cool!
I'm currently making one to run off a media player, but I'm a fairly amateur electrical engineer hobbyist, and getting parts in my town can be a pain, so it's been slow... XD
Learned a lot in the process though! All that truly matters.
pboxinator 1 year ago
Thanks for taking the time to make this very instructive video!
chitons21 1 year ago
how to you turn a dc current into a vcc? Can someone send me a link that will tell me please
Athorain 1 year ago
@Athorain If you don't know what VCC means, then you have no business dealing with the high voltages involved here, even if they are not lethal.
qwertyboy1234567899 1 year ago
@qwertyboy1234567899 I'm not trying to make a high voltage anything. I searched the web, and found nothing to tell me just what a Vcc is. So, I decided to ask people on youtube, trusting that someone would be nice enough to respond.
Why I chose this one, idk, i just did. It has electronics in it way above my level, so some should be able to answer my question right?
Athorain 1 year ago
This has been flagged as spam show
@Athorain
Are you sure you looked? A quick search for Vcc with Google comes up with this Wikipedia article: en.wikipedia . org/wiki/Vcc
Just remove the spaces in the address
qwertyboy1234567899 1 year ago
are the microfarad caps mylar or polyfilm
MrJustbecuase 1 year ago
@vegmatic1966
what do you think about adding a opto-isolator between the output pin and the mosfet?
Then there would be no noise on the 555 circuit and prevent high voltage spike destroying anything D:
Mrshutter 1 year ago
can i use an ignition coil and a 3055 NPN transistor in this circuit instead?
powermaks 1 year ago
@powermaks No, the collector to emitter voltage is too low that the flyback spike with force the transistor to conduct which may ruin it or weaken the output. You will need to modify the 555 driver as well. A MOSFET is a much simpler solution. Always use a MOSFET of 250 volts or more. MOSFETs have the internal diode as well. I don't know if an ignition could would work at the high frequencies needed.
vegmatic1966 1 year ago
@vegmatic1966 if the transistor available at the shack? i now got around to making it. also, how much amps does it draw? at 12V does the 555 chip fail?
powermaks 8 months ago
Comment removed
powermaks 8 months ago
could i use a ignition coil insted of a flyback transformer?
kkristss 1 year ago
Try making the bottom electrode from a dish of salt water. You should get a much louder speaker due to the ions.
Membwayne 1 year ago
Just thinking, If you could adjust the duty cycle of the 555 and then set the two electrodes from the flyback transformer output, could you make a Jacob's ladder? If you had a stepper circuit to adjust the 555's duty cycle?
3mustardMoNkEyS 1 year ago
i want to make a singing arc/plasma globe could i just hook up a light bulb to it? Also were does the last pin go
MrJustbecuase 1 year ago
i made the circuit, but i'm having trouble with the audio input and when i use my ac current reader it reads ac current out of pin 3 and 4 and to ground. shouldn't the pulses come out of pin 3 only and ground.
mike963369 1 year ago
how do you connect a cd player to the circut also how do you hook up the power to both areas where it calls for it I am new at this so please help me.can you show a video of your singing art circut so I can compare mine with you
7577357 1 year ago
You will need to learn how to read schematics. That is the best way to understand this stuff. Too many people want to understand electronics overnight. It takes practice and lots of learning.
vegmatic1966 1 year ago 13
@vegmatic1966 how much wattage does it put of? and can i use a 12V plug adapter for the power
MrJustbecuase 1 year ago 2
@vegmatic1966 well said and very true, but whats great is you get a lot of little successes that keep motivating you forward to achieve more and more. I mean i remember my first circuits, even if it was just a lightbulb, then you made it blink , then you added another, etc....Then maybe some day one will only be limited by their imagination and creativity. thanks again. and wish you all the best in your endeavours.
plato147 11 months ago
@7577357 Connect the CD output ground to circuit ground and connect the audio output from the CD player to 555 pin 5 through a .47uF capacitor, along with a .01uF capacitor from pin 5 to ground.
benjwgarner 1 year ago
about how loud is it?
panzuman 1 year ago
in the schematic there is only a capacitor across the fet, adding a resistor in series with it will make a proper snubber thus much better filtering. see the document i referred to for the calculations.
uN1Qu3DZ 2 years ago
I made this but it keeps blowing my 555 what can i do?
darkthero 2 years ago
You maybe will need an amplification-circuit between the 555 an the transistor.
Freewarplayer 2 years ago
@darkthero make sure you have adequate capacitors, and keep your flyback away from the PCB. also add a snubber circuit for the mosfet as i don't see one. the lack of a snubber is what's probably killing your 555.
for things such as a strobe or bike light, you can get away without a snubber. in this case it is required.
uN1Qu3DZ 2 years ago
thi si sthe first time i ever heard of a snubber circuit, Is it basically a Filter on the power supply?
darkthero 2 years ago
@darkthero don't worry, i wasn't familiar with the term a few months ago either.
yes it is a filter, and it is designed to damp the "ringing" (self-oscillating) inside a circuit. when you go in the hundreds of kHz and higher one of those can really make the difference between a device that works and one that doesn't, as i found out with my first simple SMPS project.
google for "calculating optimum snubbers", hit the first link and you got it all explained there.
uN1Qu3DZ 2 years ago
@darkthero
Try changing capacitors on the decoupler.
lilletizz 2 years ago
What do you think of using class AB MOSFET amp instead of using class E topology? I mean you can still use 555 as your modulator flowed by a high voltage op-amp such as OPA452, OPA453, OPA454 that can amplify the signal to 78Vpp. This 78Vpp AM signal is than fed into CLASS AB MOSFET amp. I wonder what the result of that be?
frosty4700 2 years ago
Are you using a DC fly-back in the video example? If so I assume the internal diode acts as an envelope demodulator?
frosty4700 2 years ago
i noriced that black box to the right. what is its amp output?
darkthero 2 years ago
Cool!!
danpifs 2 years ago
I forgot to tell you - the arc power is verry weak, so when I breathe over the arc it blow out and dissapear.
P.S. Sorry for the bad english...
reactor1997 2 years ago
Thank you for the schematic, man!
I also build the speaker. The sound is VERRY good, but the arc is verry short (about 1 cm long). I use AC flyback transformer from an old russian TV (mark "Rubin"). There are 1100 turns in the secundary coil and minimum 24 turns in the primary coil, because if I wind less than 23 turns, the transistor gets hot. And there is one strange effect - if I set the voltage higher than 24 V or I set the current bigger than 1,6 A, the sound gets mute. Please help me!
reactor1997 2 years ago
Are you supplying the 555 separate from the MOSFET? The 555 may not function right or be damaged if you exceed 18 volts. Drive the 555 at 12 volts and the MOSFET at 24 volts to see what happens. Use a common ground, of course. Beyond that, you really need to scope the waveforms to see what is happening.
vegmatic1966 2 years ago
Yes, maybe the decision is to supply the timer with 12 Volts. But I read in one book the power supply for the 555 may be from 4.5 to 30 Volts. Now I'm going to use 2 power suppliers x 12 Volts, 8 Ampers. Then the voltage for the 555 timer will be 12 Volts and for the transformer - 24 Volts. Also I want to scope the signal, but I haven't got an oscciloscope, hope one of my friends give me his own :)
reactor1997 2 years ago
Using a HV transformer with AC output should work the best. Parasitic capacitance in the output lead tends to spoil the effect. Keeping the output lead very short may help. Without drawing an arc, current should be well under 500ma. Primary winding impedance is too low if unloaded current is high.
vegmatic1966 2 years ago
yes it will work great! almost any MOSFET will work.
crazeman5522 2 years ago
verry nice,
thanks for showing :P
zezimashock 2 years ago