This circuit was found in a 1965 US documentation. The circuit converts a DC signal to a 400 Hz AC signal. Transformer data was not provided.
The Nerve-test is a traditional electronic game. The player must pass a metal ring through a...
We found this simple alarm circuit in a 1981 documentation. As we can see, it is a car alarm...
This Japanese commercial medium and short-wave radio uses 7 transistors and tunes the range from...