Transformer Kit


A simple kit giving anyone from the beginner to the most advanced user the ability to wind there very own transformer coil from scratch. after all, its one thing to say you made something from parts up. Its something more to say you made the parts too.


Dibyajyoti (Jul 17, 2014)
hi nice one
friend also refer this one
StevenJGreenfield (Apr 14, 2015)
Really? Stop spamming your project into other people's projects. Not cool.
Tesla72 (Feb 19, 2014)
Being that some confusion exists in this project i would like to clarify it now.

Firstly i will always heir on the side of caution. "Electrofrank" quickly pointed out that inductors do not in and of themselves store electricity, that being said i have no way of knowing what the end user will incorporate this project into and weather or not it will present the end user to a charge. No matter what is said here i firmly believe that touching exposed wiring once it has been is a BAD idea and stand by my statement of "do not touch".

As far as the "Mah" vs Ma statement... this is likely a simple typo. The end aim of the project however is not to give a set "do this exactly this way" but rather to provide a set of guidelines so that any hobbyist can create there own custom transformer when they need it and to there specs.
StevenJGreenfield (Apr 14, 2015)
It is mA and mAh. Upper case M means millions, lower case m means 1/1000.
ElectroFrank (Nov 04, 2012)

With reference to "TRANSFORMER KIT | JAMECO PART NO. 2160681" Step 1 - last paragraph: "An AC/AC wall adapter that outputs 350 mAh would be ideal as a power-source." (! ! ! ! !) Adaptor output is rated in amps or milliamps, not milliampere-hours ! Step 3 - last paragraph: "energy is sometimes stored in the secondary coil after first use" (! ! ! ! !) No it isn't ! There will only be a danger of shock voltage (for milliseconds or less) from an inductor if the circuit is broken whilst current is flowing. After disconnection, it stores no energy at all ! Only capacitors and batteries store energy in the form of electric charge ! Not inductors ! The author needs to study basic electronics.

StevenJGreenfield (Oct 09, 2012)

So this is not for 60Hz, then, but for higher frequencies. It has the wrong kind of core for 50 or 60Hz, and the wire is too large. You'd need a -lot- higher mu core, and a -lot- finer wire so you could fit a lot more turns in the primary. It isn't a matter of voltage versus current - the inductance is far too low, so there would be excessive current at 60Hz, and the core will almost certainly saturate, causing the current to rise even higher. This is more suited to making a custom transformer for a switching mode power supply.

SFfinalist (Aug 02, 2012)

Ok yes with 24?...AWG wire I figured as much. Still a good kit for anyone wanting to learn about transformer design....great work!

SFfinalist (Aug 01, 2012)

Hey, just curious, can this kit make a tranformer capable of having a line voltage (120V ac) primary or does it operate at a lower voltage? Can it work as an isolation transformer?

Tesla72 (Aug 01, 2012)

One thing you need to understand with transformers is that Amperage is just as important as voltage in the total outcome. if you double the voltage than the amperage drops by half. this being said, the problem you would have with household "line power" isn't just the voltage but rather the large current that is going along with it. so can it handle line "voltage" Yes. can it handle line "amperage"? NO. I would STRONGLY caution not to use direct line input .

ElectroFrank (Nov 04, 2012)

The author of this project needs to study basic electronics. An ordinary (correctly designed) transformer for household mains electricity, with a suitable load, will take a current from the mains which is determined by: 1) the mains voltage, 2) the turns ratio, 3) the load impedance. A small load on the secondary will draw only a small current in the primary, which will be only a small fraction of the secondary current, determined by the turns ratio.

geraldfryjr (Aug 17, 2013)
No!!! The core is not big enough for use at 120Vac at 60Hz and is the wrong material especially with only 120 turns of 24Ga wire as mentioned. This core is designed for a switching supply up in to the 40Khz to 100khz range, at best the lowest frequency that can/should be used with a core of this type would be about 10Khz. If you are designing a switching type supply this would be a good core. However, I don't see any specs or the size of this core so I can't quote on what the power range of this core is capable of.