This 1 channel infrared transmitter/receiver remote control is the cheapest and simplest you can find. The transmitter transmits a sequence of pulses on 36 KHz frequency carrier. The diodes are Schottky type because of their low voltage drop (only 0.2V). Link
As I was developing my IR Extender Circuit, I needed to find a way of measuring the relative intensities of different Infra red light sources. This circuit is the result of my research. I have used a photodiode, SFH2030 as an infra red sensor. A MOSFET opamp, CA3140 is used in the differential mode to [...]
This circuit was sent to me by Mr Guy Bocquillon from France. Now retired, and in his seventies, Mr Bocquillon keeps himself active in his hobby and his results and support are most appreciated. The notes on the schematic are in French as Mr Bocquillon’s english is not too good.
After buildiing both my Mark 1 [...]
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