Found in a 90s Elektor, this circuit is based on a Maxim integrated circuit of the time. The circuit supplies 5 V at its output with a maximum current of 50 mA.
The figure shows a simple circuit to power LEDs from the AC Power Line. The resistor can be a wire...
This circuit works with the previous two by demodulating the signals received modulated in FM. The...
This simple circuit controls the signal amplitude through a photoresistor optical coupler. The...