The presented circuit uses an opto-SCR. We found the circuit in the GE semiconductor manual. Equivalent triacs, depending on the load current and voltage, can be used.
This circuit can be used in PLL, frequency synthesizer in FM and VHF receivers, reducing a...
Found in documentation from the 1990s, it uses a sound effects integrated circuit, the SN7677 from...
An oscillator whose frequency can be adjusted between 500 Hz and 5 kHz with the use of a...