I recently bought an ISO-Tip cordless soldering iron. Unfortunately, the charger is 110 volt and local mains are 240 volts. After some measurements, I worked out that 5000 ohms in the mains lead would drop the voltage into the transformer to 110, but with a heat emission of 3 watts - the resistor gets hot!
I have just had the brilliant idea of imposing a diode on the input side to the transformer, so that the transformer would see a half-wave of about 120 volts peak to peak. Would this work?
Thanks,
Mike
I have just had the brilliant idea of imposing a diode on the input side to the transformer, so that the transformer would see a half-wave of about 120 volts peak to peak. Would this work?
Thanks,
Mike