USB sound card

Description. Designing and building a USB sound card is no longer a head ache because we have got the PCM 2702 integrated circuit from Tex...

Guitar and Bass Sustain Unit

We have all heard that wonderful sound of a guitar, where the note just hangs there seemingly forever (or at least until next Thursday).  S...

Power supply failure alarm

Most of the power supply failure indicator circuits need a separate power supply for themselves. But the alarm circuit presented here needs...

Negative Supply from single positive Supply

  Opamps are very useful. But one of their major drawbacks is the requirement of a dual supply. This seriously limits their applications in ...

Water Level Control

A Water detector is a small electronic device that is designed to detect the presence of water and alert humans in time to allow the p...

Air Ionizer

An air ionizer (or negative ion generator) is a device that uses high voltage to ionize (electrically charge) air molecules. N...

LC meter, Coil Capacitor meter

This LC meter circuit can measure coils and capacitors. When Lx or Cx is connected in the circuit the oscillator frequency will decrease and...

Electronic Fuse

Circuit of fuse (sekring) electronic designed to operate on 230V AC with an adjustable trip current. When the current through the load excee...

ONLINE ELECTRONIC CALCULATOR LINKS

  ONLINE ELECTRONIC CALCULATOR LINKS Amateur radio and audio calculators All Measure Measure, conversion table and calculators unit...