Have anyone ever thought that how electronic makes sound? Audio frequency signal generator it like small sound maker. It make electric signal what ear can hear from low boom (20Hz) to very high squeaky (20kHz). This Simple Audio Frequency Signal Generator Circuit very helpful for many thing: Circuit Working: Parts List: Component Quantity Resistors 1k […]
Oscillator Circuits
Electronic Muscle Stimulation Circuit
EMS circuit… it like machine using electric stimulator to make muscle go move. It have many small electronic thing like time keeper, signal maker, power booster and sticky pad. This Electronic Muscle Stimulation Circuit send little shock, not hurt but through sticky pad on skin on top muscle. This small shock like brain talk to […]
Acupuncture Point Locator Circuit
Acupuncture Point Locator Circuit is small device which helps to find special point on human body. In acupuncture thin needle goes inside our body part to reduce pain. This is old medical method. These special body points called acupuncture point or just acupoints. People think energy move through body using these points. To find these […]
Precision Electronic Rat Repellent Circuit
When we plug in Precision Electronic Rat Repellent Circuit device, it makes high loud noise that rat and mouse do not like. Human and animal cannot hear this noise because its too high sound. Good choice if we do not want to use poison. It just makes strong sound wave and rat gets scared and […]
Simple Phase Shift Oscillator Circuit using a Single Transistor
Simple Phase Shift Oscillator Circuit using a Single Transistor is like a special electric circuits. They make electric go up and down like water wave. These waves can be soft or hard and also look like curved. How fast wave go up and down are controlled by the circuit control There are many types of […]
Simple Electronic Fishing Lure Circuit
This article for Simple Electronic Fishing Lure Circuit shows how to make electric fishing lure. It uses small buzzer to make sound when fish come. Easy to make and also works very good. Be careful: fishing rules not same everywhere. Before using electric lure check in your country if it is allowed or not. What […]