Found in RCA documentation from the 1970s, this circuit is intended for firing thyristors in inverter circuits. The components are from the era and the operating frequency is 10 kHz.
This booster for listening to signals in the range from medium waves to 30 MHz was found in a 1998...
This simple circuit can drive a reed-relay when light falls onto the photo-transistor. The...
This logic level indicator also indicates the presence of pulsating signals through a third LED. It...