I am trying to build an IR system that works via the Arduino. So far, it works great. However, I want to have one IR Led on the back of my device and one in the front. However, the Arduino pin only supplies 40mA max.
Hence, when I used on IR Led, the range was still pretty decent. However, upon connecting two of the IR Leds to the same pin, it was very weak (1m range only). I was thinking that to solve this problem, I can get a cheap 7400 series AND gate. Then, I can feed the IR Line from the Arduino and split them into the two AND gates, and the AND gate will drive the IR Leds, and both will get full power (I am not sure of the rating output of a 7400 AND gate)
Is this a good idea? Any idea what a 7400 series AND gate output max current is?