This tachometer and dwell meter for old cars was found in a 1975 documentation. The circuit is a reference for those who want to recover or maintain an old car.
The CMOS 4046 integrated circuit is not very common today, consisting of a very efficient PLL for...
This three-chanel remote control transmitter uses a unijunction transistor as low frequency...
The adjustment of the maximum load voltage is made in the trimpot. The circuit is from 1994...