I need to drive 9 LED's so I thought using a 3 x 3 setup with 100R on each of the 3. This is fed from 12V. Should I drop the regulator and rather use a zener (12V?) , or is there a better config I should look at. They're standard ultra bright LED's - 20mA, 3.3V
The first time I build the circuit I setup the LED's for 12V and didnt use a reg. I plug it in to the battery and forgot it wasn't exacly 12V so it didnt work. The LED's just went extra bright and turned off, luckily they didnt blow, hence I thought a 12V reg would be a good idea.
Mmm - a current regulator. Didnt think about that at all. Thanks - I'll look into it.