This circuit was found in Motorola's Linear Interface ICs of 1993. The integrated circuit used is not common and the load current depends on the Triac.
The frequency of this clock oscillator is given by the crystal. The trimmer sets the ideal...
We found this circuit in a documentation from the 90s. It is a simple test for NPN and PNP...
We found this micro amplifier in a technical documentation from National Semiconductor. The...