This circuit uses a 7-segment display to indicate the logic level of a test circuit. The power supply is made with 5 V that can come from the analyzed circuit itself.
This receiver can operate with the transmitters shown in previous articles and even others...
This circuit uses a symmetrical power supply, and the motor is for the voltage indicated in the...
This circuit was obtained in a 1961 magazine, but it can be easily assembled today, as the...