This proximity detector circuit uses a Hall effect sensor to detect the approach of a magnetic object, such as a magnet fixed to the frame of a door. The application is simple, but widely used. The use of a Hall effect sensor solves many problems that arise when one wants to detect the opening of […]
Effect
220 V Multiple Light Effect Generator Circuit
If you are looking for a multiple light effect generator circuit to generate sequencing, reverse/forward light effects, using 220 V colorful lamps, then this circuit might help you. How the Circuit Works The following figure displays the Light Effect Generator circuit diagram. This circuit has an oscillator, a few control logic stages, a 5 V […]
Echo Effect Generator Circuit
In this post I have explained a circuit which can be used for transforming an ordinary music into a music with depth and echo effects. Generating an echo effect electronically involves a process in which an input signal is extended and then mixed with the original signal to create collapsing decaying effect, which ultimately results […]
Light Controlled Sound Effect Generator Circuit
This unique circuit allows you to create many different sound effect outputs simply by moving your hands over a couple of light dependent resistors, by varying the intensity of incident light over the LDRs. By Ramesh Powar The generator has two different cells LDRs that control a sound – burst oscillator circuit. One LDR controls the tone […]
Extended High Bass Effect from Small Speaker Box [Cross-Over-Filter]
Bigger speaker boxes produce proportionately higher bass effect, this fact is know to all of us. However, bigger boxes are not only expensive, they can be cumbersome and bulky. How about having the very same high bass effect, that a bigger box would provide, from a much smaller and compact speaker enclosure? Sounds strange right? […]
Motion Detector Circuit using Doppler Effect
The motion sensor circuit explained in the article works by using doppler shift principle, in which the moving target is detected through the continuously varying frequency, reflected from the moving object. What is Doppler Effect One very fascinating feature of sound is the Doppler effect. The Doppler effect happens when the source that is producing […]