This ultrasonic digital remote-control transmitter was found in the January 1976 issue of Radio Electronics magazine. The components are from the period. The IC is from the period.
This is another possible version of a negative voltage generator using a 555 integrated circuit. The...
This timer activates a relay after a time interval of up to 15 minutes has elapsed, starting from...
This circuit was used to regulate the speed of small DC motors of cassette recorders. However, if the...