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 circuit is from an old operational amplifiers manual. However, the setting applies to modern...
We found this circuit in a 1975 radio amateur documentation. The circuit uses TTL technology and...
June 2017 - The new EEH-ZK (Type V) hybrid conductive polymer capacitors from Panasonic with...