Circuit Skills: Power Supply

[mahela1993]

Are those side-burns real?

[TheRealGeriBoss]

I'd never buy these kits. Designing your own circuit and making a PCB is much more fun!

[patrick9771]

What a waste of time, why dont he build one from scratch instead of buying one.

[microdivision]

@patrick9771 what are you talking about, he did, he just used a kit to make it easier for others to follow along. you start with an ac signal and pass it through a transformer, a rectifier diode, a filter (in this case capacitors), and then a voltage regulator, and your result is a dc output.

[aayush10001]

there is one caution, it can kill you. i am going to gift it to my maths teacher....

[BarneySaysHi]

I can't help but wonder why it came with axial capacitors when they're mounted vertically.

[LUCKY4908]

why the fuck asking for music instead about the topic of video?

[TheLast2nd]

Kip Kay > This guy.

[Cultureshockcrew]

@TheLast2nd yeah this guys a fag

[Nopiw]

@Cultureshockcrew homophobe?

[Luna367ns]

@Cultureshockcrew dummy



[microdivision]

@TheLast2nd why? because you don't understand anything? just because you have no real interest in electronics and can only watch simple-minded videos doesn't allow you to put Collins down. in fact, kipkay, a writer and hobbyist, is worlds apart from what Collins offers.

[TheLast2nd]

@microdivision I do understand everything.. He's just boring, dude.

[nemesis4go10]

@TheLast2nd You might want to watch a Michael Bay movie instead of power supply youtube videos?

[TheLast2nd]

@nemesis4go10 Well the thing is I enjoy Techie stuff a lot, but the way this guy talks just bores me because he's so monotone and like, dead.

[TheTechFish]

Technically line VOLTAGE won't kill you, it's the current that will kill you ;p (Hence why a 50kV taser does not kill people)

[2Champions]

Collin you must share that track at 2:20!

[cocacolafan98]

4:35 Poker Face ._.

[cocacolafan98]

dont know why, but he reminds me to Agent Smith from Matrix :P

[Karate97100]

can you show all you music-files... I think they are cool... and I want them... 

[OhReallySarcastic]

@IAlexanderN

he makes the music himself

[Curixq]

I have a question.

Why exactly is the point of a -15 -- +15 V supply?

Why not move everything 15V up (since it's only the potential difference that matters)? Like a 0-30 V supply and use 15V als a ground.

[gecsan23]

@Curixq its better that way because you can use opamps, its better that way than a 0.30 V because then you would need a voltage divider fist to do a virtual ground at 15V, but the resistors may limit the max current you can draw. thake a look at this article tangentsoft. net/elec/ vgrounds.html (put together the spaces)

[TheTechFish]

@Curixq Because it would require a more sophisticated rectifier, and since it is only the PD that matters, there is no need to do so.

[Hedphelym]

Electrical tape over the live track? Now Im not a safety nut, but thats just reckless! If its live, chuck it in a box!

[Hhydrogen4Power]

Nice power supply.

[ThePlaindarkness]

hmm lol if i had the tec know how id mod that bitch XD

[troyger1]

all hail the WUBWUB machine :;O

[Raddan2010]

You aren't the most enthusiastic of speakers, are you?

[Arazand]

Since this is posted last year you have probably already read this, but switching PSU's are in general more noisy, as in PWM instability have some procent less clean power, the best way to describe this is with a battery that give a constant volt-value when filled up. A linear supply give a very close constant volt-value, while switching supplies although more effective give the least constant volt-value of the three. That makes a switching supply bad for sensitive equipment, such as audio.

[SigEpBlue]

That kit's layout and component selection is really...goofy. It makes me cringe to see those TO-220 package legs splayed out like that, and the package bodies themselves not supported & fastened to something solid. And axial-lead filter capacitors, where radial leads would clearly be preferred. Any idea as to whether these compromises were made for cost reasons?

[TheDrjodi]

could you do a video on using class A, B, C, or D power sections? like what is found in guitar amplifiers or p.a. mixing boards. thx

[Karl0n]

He's like the uncle I wish I had

[GreyFang9]

AHAHAHAHAHAHAHAHA!!!!!

Learning plus laughter! The Holy Grail of Education. Thanks!

[monstergarage2]

@davidenelson It's because the capacitor store some more power upping it up to around 17 volts because voltage regulators need a little more power then they output.

[rockybyt]

The LED @ 1:24 shouldn't have a resistor?

[justinmason100]

@rockybyt it dosent

[rockybyt]

@justinmason100 i know it doesn't have one... the question was why? lol

[justinmason100]

@rockybyt therres i build in 1

[numex106]

@rockybyt it's okay because it has a built in resistor (on the board)

[TheBenyamin525]

wow i have the same wire strippers

[davidenelson]

If the center top transformer used in this steps down the mains to 12V A.C. how do you get up to 15v DC out?? Please reply

[fridgebulb]

Electronics aren't much fun without electricity; are they Mr Anderson?

[QuantumFluxable]

120V where do you live LOL

[scheitinjebroek]

@QuantumFluxable USA

[scheitinjebroek]

@scheitinjebroek he lives there i not :P

[Richiezhang880]

7:26 so true!

[inyourfacesociety]

Drinking game: Take a shot every time he pushes up his glasses.

[fairyheli2]

@inyourfacesociety is there enough alcohol in the world?

[DaKilla738]

You don't got no thermal paste on your regulators!!!

Jokes...haha, nice video. Keep e'm coming

[321reh]

Always Interesting and NEVER BORING,,,Another Great Video From MAKE,,,Thanks Collin,,,,,,Best Regards from MR.OHM!!!

[Whisper6911]

dude what are those weird caps with the lead coming out of the top?

[fairyheli2]

@Whisper6911 just regular caps, some have 2 wires on one side, others have one on each

[fairyheli2]

120 vac, thats pussies electricity! 240 vac here with 32a fuses! fuck yeah britain is dangerous!

[mtj770]

@fairyheli2

3 phase, 400 vac here with 35 amp fuses

Slovenia is even more dangerous!

[fairyheli2]

@mtj770 our 3 phase is 415v, I was talking about household electricity from a socket

[mtj770]

@fairyheli2

Normal household uses 1 phase 230 vac up to 40 amp fuses

A lot of households (not usual in cities) use 3 phase 400 vac up to 35 amp fuses.

This way you can distribute loads evenly and don't have the light dim when the boiler or an oven are running on a different phase then the lighting

It's also useful for running certain machines (arc welder, circular saw, etc.)that run better on 3~.

p.s. According to IEC regulations GB should now have 1~ 230V and 3~400V.

[fairyheli2]

@mtj770 we apparently have 230v 1~ but no one has told the voltage, the voltage at my house is 250v 1~

[MrPlakjeham]

boring that it can kill me :o

[HavokCR]

Great, as always. But why this episode is not on Miro Make Channel? :( Watching until now...

[trudypsmith]

He's like the next How it's Made!

[Armaangandevia1]

nom nom nom nom nom nom nom nom nom nom nom nom nom nom nom

[MrROTD]

I realy don't tinker with electronics much except for rc planes and thats all plug and play components so no skill required. I like these videos a lot anyway I'm learning a lot.

[mewmaster151]

ok plz someone explain this whenim around some electronics like a psp charger or an old plasma tv i hear a high pited but faint squealing, am i crazy or hasthis been documented?

[Pygar2]

@mewmaster151 I know that old picture-tube type TVs made a high pitched sound like that. The "flyback transformer" that controlled the beam, made an audible high whistle or whine that you just had to ignore. And the older electronic flash units for cameras did too... may still, for all I know. So it is more than likely the items are actually making a noise you can hear.

[mewing6732]

Thumbs up if you stopped watching make's videos because you thought colin quit

[kanjiti]

stuck wires from my power ranger toy in a socket when i was about 4 lol

[IAlexanderN]

2:20...3:05 What is the track??? This is a very nice music!

[tomattosfutleimierda]

@IAlexanderN he creates the music c:

[IAlexanderN]

@tomattosfutleimierda That's understandable. I want to download this music to listen to at home.

[MrROTD]

@IAlexanderN It might be Colin's he's a musician

[Wischyre]

@IAlexanderN

I might be wrong, but I think Collin makes all his own music.

[123Cory321]

@IAlexanderN doesnt matter, ittle probably be taken out by SOPA

[IAlexanderN]

@123Cory321 What is the SOPA?

[plaugewolf]

@IAlexanderN

lol

are you even paying attention?

i mean what planet are you from.

its only the bill going through congress that would result in a completly regulated internet. thats it. the end. it was nice while it lasted.

[IAlexanderN]

@plaugewolf You're drunk??

[123Cory321]

@IAlexanderN lol look it up. its something that could ruin the entire american enternet

[IAlexanderN]

@123Cory321 I'm from Russia and I do not care about you and your Internet.

[123Cory321]

@IAlexanderN ok then but remember, if they come through, youtube could get taken down along with facebook. your not smart considering you dont know major american websites like this...

[IAlexanderN]

@123Cory321 what's the problem? Can I listen to any music at home?

[derekwhite26]

@IAlexanderN Assuming this is about SOPA/PIPA or ACTA, it would effect the internet internationally. Think of US servers. Also think of MegaUpload. Sorry that my country is ran by ignorant FUCKS.

[TheRareCode]

@IAlexanderN Well he has a soundcloud @ Collinmel

[nikoluka]

@IAlexanderN Probably his own music :)

[palauskas]

amazing what can be done with an LM317 and some pots eh ? xD

[gotpsp06]

stuck a paper clip in a socket when i was 6

[47crazed]

@gotpsp06 ouch

[GTXAbunada]

MORE COLLIN !!!

[TheEvilCommenter]

Solder

[TheEvilCommenter]

You use an awful lot of power

[TheEvilCommenter]

You use an awefu

[TheLameTechGuy]

@AxelTiger we do, but we don't use it on things that don't need it. Now microwaves need it, so they have a ground

[rammsteinfan19908]

it didnt kill me when i was 5 put a penny in a wall socket

[TheAzuresheep]

@rammsteinfan19908 How did you fit a penny into a wall socket? You probably didn't get it deep enough to touch a contact inside.

[snomimons]

Ha your 120v is no match for my 240v. #EUROPE #GB #UK #ENGLAND

Very good video, love all the in depth information.

[TheYoungVader]

FAKE AND GAY

[tbsys31061]

@TheYoungVader go die.

[bigjoe12345678910]

full wave rectification FTW

[fcimeson]

uh.... this seems like a lot of work for a power supply. If your looking for a general power supply go down to your local circuit shop and pick one up for 10-15 dollars. Mine includes +/- 15, 12, 5, 3.3

[Nadrealis]

@fcimeson I've never seen a decently built PSU for under 80 dollars just an FYI.

[fcimeson]

@Nadrealis Ya well I can't find the exact one I have but here is one for $13 (at my local store).

PWR SUP QUAD OUTPUT 3.3,5,12,-12

Switching (Open Frame) MAP110-4300 (can be found at digikey and Sayal)

[myguitardidyermom12]

@fcimeson why buy what you can make yourself?

[fcimeson]

@myguitardidyermom12 I agree if your doing it for the fun of making a power supply. But in my case I would rather spend my time developing other things.

[kazimierz198]

Great video and soundtrack. Is there a way to get some Collin's music?

[numex106]

can someone explain to me negative voltage?

[jakeupstudios]

you have show how you made the synth module thats sick

[Alkatross]

Classic Collin! 

[98kitt]

love the retro cat meow music........ lol

[w4rr10r11]

The way he speaks is sooooo boring. Why is it so interesting to listen to him talk?!

[llollercoaster]

With great power comes great current squared times resistance...

[truvak]

@llollercoaster great man, simply great.

[g3rrar1]

finally another collin video.

[jvp367]

I almost didn't watch this because it didn't say COLIN in the title. That's the only reason I'm subscribed to this channel...

[LightSwitchr]

Just a thought... would that work in the UK where we have 230V mains power, or would it blow the transformer?

[gelfling6]

@LightSwitchr The supply Colin assembled, is fixed to 115V input, so you would need a 230V primary, 12.6V 2-amp Split secondary (3-wire, 12.6-GND-12.6) transformer, and at that level of voltage, a enclosure,nevermind electrical tape over the primary wiring. Also a 230V primary transformer might not mount on the board as the 115V one does, though you could still run the wiring to the secondary points on the board.

[CampKohler]

@LightSwitchr The number of turns of wire in the transformer primary is designed to limit the amount of current that flows in the primary (even without using the secondary winding). Putting a 120V unit across 240V will burn up the primary, because there won't be enough inductance to keep the current in check. Using a 240V on 120V won't burn up, but it may have weak output under full load. Just look for a kit manufacturer in your own country, so that it is compatible without worrying.

[StoreFood]

Thanks a lot! Now i know how to get a "negative voltage" - which I didn't know before this video. Thank you! :)

[CampKohler]

@StoreFood In a pinch, you can always use two wall warts and swap the wires of one to get the two different polarities needed by a ckt. You wouldn't want to do that if something bad would happen if only one voltage was present (one of the wall warts might get unplugged accidentally). If you are using two metal-cased supplies where the negative is attached to the case (meaning the supply is not "floating"), then you would have to make sure the cases never touch each other or ground, else sparks.

[StoreFood]

@CampKohler Thanks for the useful information! ;)

[John3965]

Very interesting

[Caterpillarthebest]

only 120 volts??

in belgium it is 230 volt

[CampKohler]

@Caterpillarthebest In the U.S., a stand-alone device for 240V is not approved unless it draws at least 1750 watts; smaller loads must use 120V. It is a regulatory decision, not a technical one, because obvious both would work. Exception: if it's part of a 1750W item..

Speaking of line voltages, it started out here long ago at 107V, then changed to 110V, 115V and now is 120V. Who is responsible for this? Where will it stop? Is it a conspiracy of some sort? "Inquiring minds want to know."

[samanthms123]

@tkandme3 lol

[ccrimsonfox]

Not a big fan of colin's "music" but his videos are always fascinating :)

[Atwenty3]

The only reason I'm subscribed to make magazine

[rnfr]

if I see the words FAKE or GAY in another comment section, I'm going to literally reach the wires of the interwebz, and ring all your scrawny little chicken necks.

[souleater19999]

u r relly ugly

[liquidus2172]

Thumbs up if you want Collin to show us how to build a Switched-mode power supply in the next video!

[CampKohler]

@liquidus2172 He could describe the technology, but actually building a switch-mode PS from scratch would be way too big of a project. Besides, you can get them surplus for peanuts.

[CampKohler]

@liquidus2172 By scratch, it is meant designing the circuit and laying out the board yourself and buying all the parts as an individual. A kit would be easy enough to assemble, but a circuit that complicated would probably be too hard to troubleshoot for beginners, especially if they don't have the right test equipment. For most complicated stuff, kits disappeared (Heathkit, Eico, etc.) simply because you can get if from China built and working cheaper than you can buy the parts. So sad.

[liquidus2172]

@CampKohler "...a circuit that complicated would probably be too hard to troubleshoot for beginners..." no dude electronic kits are designed so even a chimp can assemble them blind folded !!!

[CampKohler]

@liquidus2172 Assembly is not the tough problem; you can usually see the trouble by visual inspection. If there is a faulty part, however, and your skill level is not up to finding it, your goose may be cooked: you've built a nicely-assembled paper weight.

[liquidus2172]

@CampKohler and how about this video??!! your statement applies to it too !!!

[CampKohler]

@liquidus2172 Yes, but it's all a matter of degree. This circuit is simple as compared to a switching PS, especially one that involves feedback loops.

[liquidus2172]

@CampKohler so it's a YES, and yet Collin did show us how to ASSEMBLE it !!!

[matthewtchernev123]

@liquidus2172 well he did not

[liquidus2172]

@matthewtchernev123 what?

[matthewtchernev123]

@liquidus2172 the next video he maid was the atari punk console

[liquidus2172]

@matthewtchernev123 yeah i know that, Collin can do whatever he wants, it was just a suggestion not an ORDER, get it!! : )

[kdwedge243]

this is the uglyest mother fucker ive seen in a while, i mis when kip did all of these vids----- in the words of raywilliamjohnson--- FAKEANDGAY!!!1

[JugglingJona]

@kdwedge243 shut up, troll.

[heimederijme12345678]

could you do shift registers

[iLoveEatingPie]

Awesome as ever, probably the only reason why I'm still subscribed to this channel.

[truvak]

great design, very elegant. Love your videos man, you rule!, you are the only reason why I am still sub to MM channel.

[RetroGameTech]

Collin's electronic vids are excellent! They're really interesting and I always end up learning something new. More like these please, Make!

[lwaite4]

Electrical tape???? he used MASKING TAPE!!!!!! >:-(

[horizonflyer9]

@lwaite4 its white electrical tape. look more closely you'll see its plastic

[pharmajoe990]

Is it Austin Powers? Or the Matrix guy?

[MrOVadim]

nice! he's a good actor=)

[DactaDork]

Yay epic new music

[MadK306]

Can you use that for the color organ or is there any power supply included in the kit?

[2454014]

Collin, you should make more videos man. Please

[BunnySk8rProductions]

I have a project i want to do but dont know how to do it, i have a number of small electronics that i want to be powered by one rechargeable battery power source, problem is i dont know how to uhhh do that... help?

[matthewtchernev123]

@BunnySk8rProductions it depends how many volts the project takes. if they are all 9 volt you can hook them in parellel meaning p to p and n to n. with only using one 9 volt battery. if you have like say 3 projects and each of them are 9 volt you can hook them in series. meaning p to n p to n. and you will need a 27 volt power supply. and if its a battery its ok but a transformer you need to look out for the voltage and the mA. and the battery won't last that long if you put it in parellel.

[BunnySk8rProductions]

@matthewtchernev123 no they aren't all the same, there is a two way radio, a 4 bright led flashlight, and 3 small fans that i want to hook all to one powersupply

[matthewtchernev123]

@BunnySk8rProductions how many volts are they

[matthewtchernev123]

@BunnySk8rProductions and mA is also important

[matthewtchernev123]

@BunnySk8rProductions depending how much the parts and everything takes.

[BunnySk8rProductions]

@matthewtchernev123 the fans are 3v and the lights are 3v the radio is 4.5v and sorry not sure bout the mA

[matthewtchernev123]

@BunnySk8rProductions how many fans and lights do you have. sorry i forgot

[BunnySk8rProductions]

@matthewtchernev123 4 leds and 3 fans the lights are powered by 2 AAs and the fans are also powered by 2 AAs, the radio is 3 AAAs

[matthewtchernev123]

@BunnySk8rProductions are the leds and fans separete

[CampKohler]

@BunnySk8rProductions Forget about putting them in series for 27. This won't work unless they all take the same amount of current, which is highly doubtful. Even if they were 3 identical circuits, if anything changes in the circuit (like music playing, lights blinking, etc.), then the change is felt in the other two circuits. No, it has to be in parallel. The first thing to decide is over what voltage range will everything work (as the batt drains down) and what current will each ckt draw?

[BunnySk8rProductions]

@CampKohler and how would i go about figuring that out?

@matthewtchernev123 yes they're separate

[CampKohler]

@BunnySk8rProductions Well, you could "figure it out," i.e. do the engineering, but it would be easier to measure the current drawn by each ckt using the current scale of a VOM or DVM put between a ckt and the batt.. Add the amps of each ckt to tell you what the batt has to supply. If you have a variable voltage supply (or can borrow one), you can run the volts down to where a ckt dies and then you know the minimum voltage the batt. must output before recharging.