Originally posted by Raui
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I want to get 220VDC. For that I'm doing a square wave pulse generator with a 555. The output is 55 Hz. Then, with that output I connect a transformer (9vdc 0.3ah to 220vac 50-60hz), and then I have to put the spark + capacitors like in the hairpin.
The barrier I found is that the transformer output is 0 volts
In the pin 3 of the 555 oscillator, I'm using a 470 ohm resistor and a transistor bd138. When I measure the output with a multimeter, it's 3VDC.
I'm using a 12V battery. If I remove the resistor+transistor, the output is 12VDC 55HZ square wave and the light bulb (12v 0.3ah) lights up. I need very few about electronics. Maybe I've choosen the wrong transistor?
Originally posted by boguslaw
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