This circuit was found in a 73 magazine for radio amateurs of the 90s. The circuit uses two types of indicators, the diodes are for general use. The power supply is 5 V.
We can either supply this circuit with 12 V if we use a relay for this voltage as well as 6 V if...
Found in documentation from the 1980s, this circuit can generate signals in a range that reaches a few...
This unijunction transistor trigger pulse generator circuit was found in the March 1973 issue of...