This circuit uses an unusual sensor nowadays, but the configuration can be adapted to more modern types, as well as the operational amplifier. The circuit is from an 80's documentation.
This simple 741 circuit was found in the August 1993 Electronics Now magazine. The source must be...
Found in Popular Electronics, this sophisticated short-wave receiver requires a lot of skill from...
This sequencer allows the use of switches or sensors to generate the steps of a bipolar stepper...