This circuit provides both frequency and voltage division. The circuit was found in a 1966 documentation. The circuit must be supplied with voltages from 32 to 40 V.
The CMOS 4046 integrated circuit is not very common today, consisting of a very efficient PLL for...
This circuit turns on an old cassette recorder when the telephone rings, thus enabling the...
This circuit can be used in panel signaling with common incandescent lamp. The lamp will flash at a...