This simple low power triplicator was found in 90’s American documentation. The diodes can be general purpose types and the frequency is determined by the RC network of the 555.
In the figure we have a high stability voltage reference, providing a voltage of 10 V at the...
Photodiodes can be used to sense moving objects, such as optical switches and encoders. In the...
This circuit, which can be used as a shield, was found in a 1980s documentation. The circuit can be...