This transmitter for the 40 meter or 7 MHz band was found in a magazine 73 for radio amateurs of the 90s. The circuit has a power of ½ W.
Here we show how two 4017s can be cascaded to count above 10. The circuits are driven by a square...
Found in na 1970 EDN this circuit has a parallel regulation providing a symmetrical output of 15 V....
This circuit was found in an American documentation from 1966. The transistors are from that time...