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Need help with IR Circuit

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Circuit Maker

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Hello everybody,
I am new to IR circuits.
I want to make this circuit but I cound not find an NPN Phototransistor. I have an IR Module and can I use it instead of the photo transistor.
**broken link removed**

I read this forum but I didnt find the solution. https://www.edaboard.com/threads/245544/
 

Circuit Maker

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It should work very well but the Collector-Emitter voltage is too high for the circuit.
 

D.A.(Tony)Stewart

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You are far better off to buy an integrated IR receiver selected or the burst frequency (eg 38kHz ) of your chosen system compatability or interference from other remotes.

Vishay/sharp make the best and they are cheap.

You just need a good cap close to the part with 3 leads. The advantage is daylight filter (dark lens), AGC, and builtin bandpass filter. Good for 5 to 20m depending on emitter current from 50 to 150mA and single double or triple IR LEDs in series ~1.3 to 1.6 V per LED. Then compute series drop resistor from 3V, 5V etc low supply using Ohm's Law and allow at least 0.5 for a good switch, not a Darlington... <5 Ohm Mosfet preferred or low Vce sat transistor.

Eg. One of hundreds avail at Mouser. https://www.sharpsme.com/download/gp1um28x-DSpdf

Sharp also make the best matching IR emitters, and cheap, but you may consider a programmable universal remote.
 

ahsan_i_h

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IR phototransistor/photodiode looks like a black LED. See the picture below



Show the picture in the shops or ask for black LED. You may get something similar to that. Then check it using a multimeter to make sure, that it is a phototransistor. If you get only photodiodes, then no problem, you can make it phototransistor using an extra transistor.
 

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