This circuit was found in an Elektor from the 90s. The integrated circuit is uncommon today. This integrated circuit consists of a temperature sensor.
This is the basic receiver for the CIR12025 that consists of the transmitter. The circuit is...
This circuit of a 1964 Electronic Design uses a photodiode from the time. Modern equivalent can be used....
With the circuit shown, when the brightness of one lamp decreases, that of the other increases. There is...