This circuit was obtained in a 1982 English magazine. The purpose of this circuit is to interface signals other than TTL circuits with TTL inputs. The transistor can be a BC548, 2N2222 or any equivalent.
This circuit was found in a 90s Popular Electronics. The circuit uses components from that time,...
This circuit simulates a diode whose characteristics can be adjusted with a trimpot. The circuit is...
This circuit is a modification of the previous one, also found in the July 1995 Electronics Now...