This circuit digitally counts input pulses. The circuit from a November 1970 Radio Electronics uses unijunction programmable transistors. Note the counted pulse duration.
This circuit is ideal for recovering vinyl media with a linear response from the RIAA curve of the...
Some delicate sensors such as reed-switches and even sensors made with small metal plates do not...
This circuit was obtained in a manual for radio amateurs from 1975. It is a circuit that allows the...