Analog to digital converter (CB20538E)

This TTL circuit for PC was found in an English documentation from 1992. The integrated circuit used ZN426E is not in common today.

Reference Voltage Amplifier (CB4906E)
This circuit is from an old manual of operational amplifiers. The setting can be adapted to work...
Low Battery Indicator (CB6063E)
This circuit is from an American 80's documentation. The transistor is general purpose,...
AD7779 24-bit ADC Simultaneous Sampling (COM116E)
September 2016 - It can be obtained from Mouser Electronics the new ADC AD7779 from Analog Devices with...