We found this time base circuit in a timer project from the August 1972 Radio Electronics magazine. The circuit takes advantage of the 60 Hz signal from the power grid.
This circuit consists of a Step-Down converter (voltage reducer) that can provide a 5 A output with...
This circuit is from an English publication of 1982. The bipolar transistor can be a BC548 and the...
The frequency of the sound produced in the speaker depends on the light that falls on the...