The ADC801 is not an easy component to obtain today, but the configuration is worth reference. The circuit is from National Semiconductor's Linear Applications Handbook.
This current sensor employs the Texas Instruments LMV358A low voltage operational amplifier. This...
This beat frequency oscillator or BFO was found in an American 1980s documentation. The circuit is...
These circuits prevent bouncing in alarm systems. The circuit indicated is for sensors connected in...