Hello everyone, if someone is willing to help and know how, please?
How to choose a coil?
Does it depend on the PWM signal frequency?
For the test I used a coil of 30uH, Arduino PWM 62kHz and get the following results?
5V DC to 12V DC, drive 12V/21W bulb, no problem, the current is about 1.7A!
When I lower the voltage input to 3.3V then I get a current of 300mA and do not go any further.