Let's Make Robots!

AC wall power

I need to power 2 picaxes and 25 LEDs, each with it's own 1k resistor. Also a small DC motor. I would like to use an AC adapter, but only what is necessary (need the others for later). I have three 5V adapters: 250ma, 400ma, and 1A. Which should I use?

Comment viewing options

Select your preferred way to display the comments and click "Save settings" to activate your changes.
Most LEDs will flicker, 2 will be constant, 1 will flash, motor will be on when button is pressed. Now what I'm asking is, what resistances will I need for my components?

If you don't need them all at once, you could use the 1A for design and prototyping, then do a current measument on the actual board and see what is really required.

1k works for my battery electronics, and i thought LEDs were 20ma

25*0.005 (5ma) = 125ma, However 1K may be too low of a resistance for the LEDs.