Found in American documentation, this crystal oscillator that can have harmonics in the FM range, has the possibility of being modulated in frequency.
This simple touch alarm, found in a 1995 documentation, uses common components and a triac to...
This circuit can be implemented with any triac of the TIC series and the lamp must be...
Found in RCA documentation from the 90s, this circuit uses components from that time. CA3019 is...