The circuit shown was found in the February 1994 issue of Electronics Now magazine. The circuit records messages for a few seconds and plays them back as keys are selected.
This traditional unijunction transistor configuration was found in a 1980s documentation. The functions are...
Found in a 1964 Electronic Design, this circuit uses transistors from that time. Equivalent...
Operating in the FM range, this is one of the many versions of FM transmitter that the reader can...