So do all IR receivers have that square type of casing around them or can they also looks just like regular LED's?
QuoteSo do all IR receivers have that square type of casing around them or can they also looks just like regular LED's?They probably do not look like regular LED's. You have to distinguish between an "IR logic decoder" and a much simpler "IR photodiode" or "IR phototransistor". An IR logic decoder (like the TSOP4838) has an IR photodiode inside it, plus a whole bunch of additional circuitry to pulse a logic output low when infrared energy is detected at a specific frequency (38 kHz). It also generally has 3 pins because it needs 2 power pins (e.g., +5V and 0V) in addition to its logic output.The simpler IR photodiode/transistor are just passive devices; they aren't sensitive to any particular frequency, they don't have any additional circuitry, and they only have 2 pins. You definitely want the "IR logic decoder" if you're going to be decoding infrared remote controls.--The Aussie Shield: breakout all 28 pins to quick-connect terminals
Yes. It will provide digital output without a decoding.
Is it my turn?So, what are you doing?