The LM121 integrated circuit is no longer common in our market, with more modern equivalent versions. The circuit is from the 1994 Linear Applications Handbook by National Semiconductor.
This amplifier configuration with the LM111 uses cut-off diodes (Clamp) to improve the response. The...
Found in the documentation on PCs, this circuit excites LEDs whose current is determined by R3....
This bistable control uses a 4069 as bistable. The circuit can drive relays up to 100 mA with the...