This high impedance circuit was found in 1967 documentation by Ferranti. The original operational amplifier is from that time. The circuit can be implemented with modern equivalents.
This circuit was found in an American documentation from 1968. The circuit generates ladder-shaped...
This circuit keeps an LED on briefly when S1 is pressed. The time depends on C1. The circuit is...
This circuit was found in old documentation, but it adapts perfectly to modern applications with...