This relay shield circuit for old computers was found in January 1983 Radio Electronics magazine. The relays are sensitive types with currents up to 200 mA.
This very low power amplifier is designed by Amperex for hearing aids. It is based on TAA370 which is...
The integrated circuit used in this configuration is uncommon today. The diodes are for general use...
This logic circuit that transfers the level from one gate to the next with each clock pulse was...