Electronic projects often need a signal source and this signal can be a pulse or square wave. Therefore, a frequency generator is useful for these type of signal source. Here, we have used LM3909 IC which is simple with low power, it works well on small voltage and also the circuit is cheap and easy. […]
Oscillator Circuits
Simple Two Transistor Buzzer Circuit
A buzzer is a small sound making device that is used in alarms, toys, and indicators. This Simple Two Transistor Buzzer Circuit is very simple and easy to make. It uses only two transistors and therefore, it is good for beginners. Also, it works with low voltage and because of this it is safe to […]
Square and Triangle Wave Generator Circuit
This Square and Triangle Wave Generator Circuit is a simple waveform generator. It gives two outputs at same time with one output is square wave and another output is triangle wave. Also, the circuit uses only one IC which uses few resistors and capacitors. So the cost is low and the circuit is easy to […]
9V Loud Speaker Sound Generator Circuit
This article explains about a 9V Loud Speaker Sound Generator Circuit. It is simple and is with low cost and it works on 9V DC power supply. It gives loud sound compared to simple buzzer. Therefore it is useful for alarms, door bells, alerts and projects. Here, common transistors are used so beginners can build […]
50Hz Square Wave Generator Circuit using Transistors
This article is for 50Hz Square Wave Generator Circuit using Transistors. Two transistors switch ON and OFF one by one. Outputs blink opposite time. No IC is used only simple parts are required. We can change resistor or capacitor to change speed. This circuit is good to learn basic oscillator working. Circuit Working: Parts List: […]
Audio Oscillator Organ Circuit
This article is about small Audio Oscillator Organ Circuit, we can hold in our hand. It plays simple notes and make funny tones. It uses very simple parts and shows how oscillator make sound. And also shows how amplifier make sound big. It works on low voltage which is safe for kids. It gives a […]