This TTL circuit found in the September 1996 issue of Electronics Now magazine doubles the frequency of a rectangular signal. The power supply must be 5 V.
This circuit was obtained in a documentation for radio amateurs in 1974. The coil consists of 12...
This simple alarm for doors and windows was found in a Japanese publication from the 1960s. The...
This is a circuit of the 80's ON Semiconductor thyristor manual. Of course, the configuration can be...