I’ve decided to investigate IR codes and sensing thereof with the Arduino. I have the UNO starter kit and this emitter/receiver assembly out of a paper shredder.
The consensus on the web is to use the IR sensor to drive an LM358 opamp to get a useable signal. However, the kit has a few BC547Bs (small signal NPN) but no opamps – and I’m not really up for making up a parts order to get one IC. Is there some circuit I could put together using one or more BC547Bs to get a good logic level signal? I was thinking something like this:
Or, maybe two BC547s in a Darlington configuration? Is it even possible with just a couple of transistors?
I also have a 74HC00 if that would help.