Found in a 90s Popular Electronics, it serves both TTL and CMOS logic. The injector can provide 10 kHz or 100 Hz signals. The circuit drives a transducer and two LEDs.
This circuit is from an Electronics World of 1964. The circuit can be made with modern...
We found this circuit in a Popular Electronics of the 90s. The MOSFET can be of any type,...
With this regulator we can have currents of up to 4 amps with 5V at the output. The transistor can be...