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.
June 2017 - Mouser Electronics has in stock the new AC Metallized Polypropylene Film Capacitors...
This step-down converter with 10 to 60 V input produces a 5 V output with a maximum current of 5...
This light-sensing probe was found in a 90s Popular Electronics. The circuit detects light sources by...