This TTL decoder circuit for PC ports was found in a document from 1992. The power supply can be PC's own circuit.
Originally this circuit is from an English magazine, but I found it in Argentina's Radio Chassis...
This circuit was found in the December 1992 Radio Electronis magazine. R2 is an NTC, there is a...
If you have a common analog multimeter, you can increase its input resistance in the measurement of...