Capacitors Tutorial

The object is to get the cell voltage high enough for the sulphate to dissolve without boiling...

A J309 Siliconix FET feeds a 2N5109 in a wideband RF amplifier configuration. A relay is used to...

Three individual flashing circuits that use an LM3909 LED flasher/oscillator IC create the...

A timer (LM555CN) and decode counter is used to generate duty cycles from 10% to 100% to control...

This option has the advantage that one does not need to change anything in the receiver itself....

This detector circuit is sensitive to low frequency electromagnetic radiation and will detect for...

This circuit is an Electronic Locker. It is controlled by a switches combination (by a code)....

The TDA1029 is a dual operational amplifier (connected as an impedance converter) each amplifier...

This is a very simple ring modulator circuit which will allow you to make interesting analogue...

Many later radios use four 7-pin valves and require a 90V HT supply at typically 12mA and a 1. 5V...