My source voltage is 22V. I need to connect this source to a 5V circuit. I need a resistor in between, but I've forgotten how to calculate this. Can anyone help please? Thanks!
I agree with @MrChips and would hasten to add that almost any other solution would be superior. We need to stamp out the notion that using a resistor for this purpose is a valid idea.My source voltage is 22V. I need to connect this source to a 5V circuit. I need a resistor in between, but I've forgotten how to calculate this. Can anyone help please? Thanks!
If it normally runs off a button cell, it must take a very low current. A linear regulator would be better. I'd suggest LP2951Thanks, everyone. I had no idea of the current. The circuit I'm trying to power is usually powered by a button cell, but can take an input that's higher without frying it. I've run it off 3 AA batteries just fine - but my new source is 22V (and again, I don't know at what current). My documentation, unfortunately, is scarce.
I didn't know there was any such thing as this buck converter, but that sounds like the ideal way to do this. Thanks again!
by Jake Hertz
by Aaron Carman
by Aaron Carman
by Aaron Carman