We found this circuit in an Electronic Design. The main integrated circuit is the 4017. The frequencies are determined by the RC circuits as well as the duration of the generated pulse train.
We find this circuit in a radio amateur publication of 1977. Its purpose is to measure the...
In the figure we have a battery charging circuit for currents up to about 5 A. In series with the...
This circuit is indicated for supplying the CB17495E transmitter. The BD135 must have a small heat...