Hi to all, I'm Mike, subject line describes my incompetence
First off, apologies if this has been queried before, please point me to the FAQ or relevant posting.
I've been trying to reduce 5v DC to 3v DC using a resistor in a test circuit to power 4 x 3v LEDs.
I used an online calculator to find I needed a 100 Ohm resistor to get 3v. However, when I check the output
with a voltmeter there is no difference, still reads 5v
TIA for any assistance, Mike.
First off, apologies if this has been queried before, please point me to the FAQ or relevant posting.
I've been trying to reduce 5v DC to 3v DC using a resistor in a test circuit to power 4 x 3v LEDs.
I used an online calculator to find I needed a 100 Ohm resistor to get 3v. However, when I check the output
with a voltmeter there is no difference, still reads 5v
TIA for any assistance, Mike.