Found in a 1960s RCA documentation, this circuit applies to most common triacs. The trigger device is a neon lamp and the sensor is an LDR. R is typically 100k and C is 220 nF.
The project that we present below is very interesting, serving to identify remote calls such as in...
This circuit was found in a Dutch documentation from 1970. The circuit makes use of semiconductors that...
This amplifier with an OTA has a gain of 40 dB. The power supply must be symmetrical. Found in...