Found in a Hands On Electronics from the 90s, this circuit can be easily assembled today, as the FET can be equivalent and the operational is general-purpose.
September 2017 - Arduino Lucky Shield shields containing a 5 V OMRON-g6RL relay, a Everylight...
This control panel allows the use of NO and NC sensors, turning the alarm on after 30 seconds...
This AC operational amplifier has a power stage and a gain determined by R2. The maximum output...