Hello, I am running a camera that requires 5V 80-100mA. I can use the 5V output of arduino, no problem. I tried running from a digital pin(which I believe provides ~40mA), this does not work. So I tied 3 together to get my mA requirement. I rather not use all of these pins just to provide power to …

Arduino 5V output - Switch a device on/off with relay

DuaneB April 10, 2012, 4:52am 4

Hi,
Go for the transistor option, its cheaper.

Duane B