captaincaveman
New Member
hi,newbie to all this.I have a question about dropping voltage from 12v to 9v, i have a kind of strobing circuit with two bright l.e.d's(i'll post when i have scematic i can upload)its currently powered by a 9v pp3 battery and was wondering how to power it from a 12v car battery. Is there a formula avaliable without knowing current drawn to drop voltage from 12v to 9v? can a resistor be put in series with input from power supply or does it have to be done with a voltage divider?
can anyone help, it would be nice to have a formula for both if possible, to save me asking the question later
also another quick one. can anyone tell me a good program to draw scematics(with electronic symbols)thanks
Thanks again
Captaincaveman
can anyone help, it would be nice to have a formula for both if possible, to save me asking the question later
also another quick one. can anyone tell me a good program to draw scematics(with electronic symbols)thanks
Thanks again
Captaincaveman