In this circuit the 555 timer is used in a novel way, as a voltage controlled switch.The old and omnipresent NE555 can be very good at something it was not meant for: driving relays or other loads up ...
We’ll start with my power supply. It’s a 143D two amp bench supply from Southwest Technical Products Corporation [8]. It came as a kit, and I built it around 1968. Although admittedly the caps are ...
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