In this 2001 circuit we have the way to trigger an SCR with a phototransistor. The circuit appears elsewhere in this section, obtained from publications from different eras.
This circuit was found in a Texas Instruments linear application manual. The circuit uses an...
The components used in this 80's circuit are not common today. The circuit is very sensitive and must...
An excellent low frequency sine signal is produced by this oscillator. The frequency is determined by the...