A Silicon Signal Diode (in glass package) works as an IR Photodetector!

Everyday brings some new knowledge and/or 'discovery'.

I was wondering if a silicon signal diode in a glass packaging such as 1N4148 or 1N914 could detect IR signals?

Sure enough! Just treat the diode as an IR photodiode, reverse bias it with DC voltage and convert the reverse current to voltage with a resistor. This setup is also insensitive to visible light.

Here is the proof. This simple set up can detect TV/AC Remote signals!

 

 Happy Tinkering!