I've recently returned to this hobby, well hobby for me, and I am taking another crack at learning IR. All the way from the basics, I've forgotten quite a bit it seems. Making a simple IR detector circuit seemed like a good place to start. I've found a few on google and on the Vishay TSOP datasheet I found this one; attached, that I build on a breadboard.
Thing is, it seems to work, but nowhere near as good as some of the examples I've seen on youtube and google. It's is supposed to work like this, you point any IR remote at it, push a button and the leds lites up. I've build mine, but the leds is perpetually on, very dimly, and when I aim an IR device at it, the led flickers fast. So it does detect something.
Only differences to the circuit I made is that I used a 300 Ohm res. instead of the 330 and 100 instead of 120. Alternative circuits, using transistors and such, give the same result. Led is always on, and flickers when detecting IR. Any idea what could be wrong?