Quick and Easy Step Up Transformer Driver

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This will show you how to set up a power transformer driver which can be used to power flyback transformers and various other transformers. The driver is the speed controller out of a cordless drill.

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Step 1: Collect All That You Need.

You will need:
The speed controller out of a cordless drill.
A small neon indicator lamp or other gas tube.
A step up transformer. You can wind one yourself or use a flyback.
A battery. Mine is 7.2 volts

Step 2: Remove the Spring Form the Speed Controller (optional)

All speed controllers are different. It should be possible to pop them apart and remove the small spring that keeps the switch off. Just leave it in if you want to make a tazer out of this. Be careful when taking it apart because all designs vary. The mosfet might also have a heat sink. If you are powering tiny toroidal transformers then you probably won't need it. If you do remove the spring, take note of where each wire is connected to so you do not end up with destroyed mosfets or circit boards. In my one there was a ceramic circuit board. Probably to cope with the heat of large currents.

Step 3: Connect Everything Back Up.

On the bottom of the speed controller there might be letters next to the power connections. If not, refer to your diagram if you created one. To power a transformer, connect the wires that originally powered the motor to the primary coils and press the trigger button to power up the device.

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    9 Discussions


    7 years ago on Introduction

    can you please tell me the serial number of the electronic component mounted on that heat sink?it would be great cause i reallly need it,if you can send me a email,thanks


    8 years ago on Introduction

    Don't take this the wrong way but, this doesn't really tell you how to do anything.


    Reply 8 years ago on Introduction

    It would really not be useful for an LED. You would be better off powering an LED directly from a battery. This setup without the transformer would be good for high powered laser diodes.


    Reply 8 years ago on Introduction

    If you get a toroid out of a power supply or get a small transformer out of a wall switching power supply like the ones used for powering laptops or charging phones. You then need to remove all the windings from the transformer. To make a step up one, just wind 6 turns of thick wire for a primary then varnish them and for the secondary wind 1000 turns. You need quite a lot of amps to power one.