This small transmitter appeared in the March 1989 issue of Radio Electronics magazine. The two-transistor circuit used an electret microphone and had a range of a few dozen meters.
In the figure we have the way to make the three-phase control of a motor using opto-diacs. The circuit is...
This circuit consists of a traditional version amplifier with complementary output transistors...
This circuit allows you to read temperatures with a common digital voltmeter. We found it in the...