To measure frequency one does not immediately have to ‘go digital’. The analogue approach will invariably prove simpler and cheaper, in particular when the analogue readout (the multimeter) is already […]

This simple recording level meter circuit can be used for displaying the recording level of an audio system. The circuit shows a two—stage voltage amplifier driving a recording level meter. […]

Simple transistor tester circuit is quite easy and low cost circuit, is just not built to calculate any transistor efficiency figures, however is designed to get fast testing to signify […]