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morse code oscillator schematic

Portable Morse Code Practice Oscillator

T.K. Hareendran - 05/16/14

Little circuit of a Morse Code Oscillator is presented here. Excellent for learning and teaching Morse code, this [...]
heater controller circuit

Dew Heater Controller For Telescope

T.K. Hareendran - 05/08/14

Dew (condensed moisture) is one of the astronomer's worst enemies, and all telescopes are subject to the dew [...]
model railroad controller circuit

Model Railroad Controller with Presence Detector

T.K. Hareendran - 03/31/14

Railroads are a big part of the history. They take us back to an earlier time where once [...]
Rocket Launch Controller Circuit Schematic

Model Rocket Launch Controller

T.K. Hareendran - 03/19/14

Model rocketry is an amusing hobby! Model rocket launcher circuit presented here is carefully designed to avoid accidental [...]
bird bath fountain circuit

Bird Bath Fountain Monitor

T.K. Hareendran - 11/16/13

A bird bath fountain (a small shallow pond-created with a water-filled basin- in which birds may bath and [...]
rf spy bug detector circuit schematic

RF Spy Bug Detector Circuit

P. Marian - 05/23/13

Here is a simple RF bug detector that will help you detect spy bugs and can operate up [...]
infrared model train detector schematic

Infrared Model Train Detector

T.K. Hareendran - 05/08/13

This simple and economical IR model train detector circuit is intended especially for those hobbyists who wish to [...]
pcb drill speed controller schematic

PCB Drill Speed Controller with 555

T.K. Hareendran - 03/18/13

Described here is a simple, inexpensive and useful circuit for electronics hobbyists. The circuit is nothing but a [...]
human reaction time test schematic

Test Human Reaction Time with the 555 IC

P. Marian - 02/26/13

With this simple circuit that is built with the 555 IC you can test human reaction time. You [...]
strobe lighting project kit

Strobe Lights Project

Edgefx Kits - 02/24/13

Stroboscopic effects of lights for nightclubs are realized by bringing into play old white Light Emitting Diodes (LEDs) [...]
12V Load Switch

Engine Running Detector, Load Switch

Jim Keith - 11/07/12

This circuit determines when an engine is running, and when running, it turns on a solid-state switch to [...]
555 Duty Cycle Control Schematic

555 Duty Cycle Control

Jim Keith - 10/20/12

Here is a simple oscillator circuit that varies the duty cycle over a wide range without affecting the [...]
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