I bet you've seen the circuits where a 555 timer in astable mode drives a power transistor such as a 2N3055 which switches this type of coil or CRT high voltage transformer at 12 volts. CFLs really light up and you can make a Jacob's Ladder with the 10-20 Kv.
The Fluorescent lantern I took apart had a pair of transistors driving a small step-up transformer at a couple of watts to light a 6" tube off 6 volts. I put a heatsink on the larger transistor and ran it at 9 volts for brighter light.
@Nivicoman yes, but 2N3055 is poor choice of transistor and 555 can not work under 5 volt.
Lighting CFL requires high voltage AND some current. not just high voltage. I found that correct voltage multiplication of the transformer make a big difference on the output brightness. While even 1.5V can light them, without correct transformer, it wouldn't produce bright CFL. 12V circuit with car coil may produce less bright light than 12V circuit with 9V adaptor as transformer.
@sucahyovideo you could always run the 555 at the same 12 volts and find a better transistor for such use. I mention the 2N3055 just because I have seen it in cookbooks with this type of circuit. I suppose a switching duty power NPN transistor would be the choice.
@sucahyovideo I have a Radio Shack "Crazy Light" which randomly flashes 6 NE2 neon bulbs. 9 volts DC is stepped up to 200 volts by means of a single transistor Hartley oscillator using a 10 K :200 K audio coupling transformer. A 2SB186 Germanium transistor switches it at about 400 Hz. A single 1N4004 diode rectifies the 200 volts and each NE2 is paralleled with a small value cap and in turn fed through a 1 M resistor-they comprise a relaxation oscillator at about 2 Hz.
@Nivicoman that must look cool :). There is joule thief circuit that can do the same with CT transformer. We can also lit the neon with coil with no secondary. If we switch a coil good enough, the BEMF have enough voltage to lit a neon bulb. You can test it with a coil and a neon bulb in parallel then tapping the connection to a 12V battery.
I bet you've seen the circuits where a 555 timer in astable mode drives a power transistor such as a 2N3055 which switches this type of coil or CRT high voltage transformer at 12 volts. CFLs really light up and you can make a Jacob's Ladder with the 10-20 Kv.
The Fluorescent lantern I took apart had a pair of transistors driving a small step-up transformer at a couple of watts to light a 6" tube off 6 volts. I put a heatsink on the larger transistor and ran it at 9 volts for brighter light.
Nivicoman 1 year ago
@Nivicoman yes, but 2N3055 is poor choice of transistor and 555 can not work under 5 volt.
Lighting CFL requires high voltage AND some current. not just high voltage. I found that correct voltage multiplication of the transformer make a big difference on the output brightness. While even 1.5V can light them, without correct transformer, it wouldn't produce bright CFL. 12V circuit with car coil may produce less bright light than 12V circuit with 9V adaptor as transformer.
sucahyovideo 1 year ago
@sucahyovideo you could always run the 555 at the same 12 volts and find a better transistor for such use. I mention the 2N3055 just because I have seen it in cookbooks with this type of circuit. I suppose a switching duty power NPN transistor would be the choice.
Nivicoman 1 year ago
@Nivicoman Ok. Based from my experiment, replacing 2N3055 with KSC5027 double the output. Driving the NPN with inverted PNP double it up again.
sucahyovideo 1 year ago
@sucahyovideo I have a Radio Shack "Crazy Light" which randomly flashes 6 NE2 neon bulbs. 9 volts DC is stepped up to 200 volts by means of a single transistor Hartley oscillator using a 10 K :200 K audio coupling transformer. A 2SB186 Germanium transistor switches it at about 400 Hz. A single 1N4004 diode rectifies the 200 volts and each NE2 is paralleled with a small value cap and in turn fed through a 1 M resistor-they comprise a relaxation oscillator at about 2 Hz.
Nivicoman 1 year ago
@Nivicoman that must look cool :). There is joule thief circuit that can do the same with CT transformer. We can also lit the neon with coil with no secondary. If we switch a coil good enough, the BEMF have enough voltage to lit a neon bulb. You can test it with a coil and a neon bulb in parallel then tapping the connection to a 12V battery.
sucahyovideo 1 year ago
cool vid, but its a bit blury.
powermaks 2 years ago
that's a sweet looking coil, you'll have fun making experiments with that one :-) love your work Sucahyo
Inquorate 3 years ago
Thank you for the coil :).
sucahyovideo 3 years ago