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.
Found in Philips' 1967 documentation, this circuit makes use of period components. The SCR can be...
The circuit presented, from the Analog Devices linear integrated circuits manual, has compensation for...
This circuit uses a 741 operational amplifier that must be powered by a symmetrical source of 6 to...