Found in a 90’s American documentation, this circuit indicates the frequency of input pulses up to 1 kHz. The circuit has a very explored configuration on this site.
This circuit generates voltages of tens of thousands of volts for projects such as electrostatic filters...
This circuit was found in an old American documentation. The operational used is of the...
Rechargeable Nicad batteries type AA, C or D can be recharged with this circuit, which is nothing...