Simple Adjustable Frequency Square Wave Generator Circuit is easy and flexible. It is used in signal processing, modulation and in many projects. Here we see variable frequency oscillator using 555 timer IC which makes square waves and where user can change frequency. 555 works in astable mode and turning potentiometer changes output speed. Circuit is […]
Oscillator Circuits
Simple Sawtooth Wave Generator Circuit
Simple Sawtooth Wave Generator Circuit is used in oscilloscope, TV, function generator and PWM. IC 555 is very common and is easy to make sawtooth. Voltage goes up slow and drop fast in sawtooth shape. Frequency changes with potentiometer. Circuit works with 5V to 15V. Circuit Working: Parts List: Component Value/Part Number Quantity Resistor 2.2k […]
Simple Micro Flasher Circuit using IC CD 4093
Simple Micro Flasher Circuit using IC CD 4093 is easy way to make LED blink for many indicators. CD 4093 has four NAND Schmitt trigger gates inside. It runs on 6V battery and need few parts only which is very simple and good. Flashing happens because one NAND gate turn LED ON and OFF steady. […]
Timer Based Mosquito Repeller Power Saver Circuit
Mosquito repellers are popular to keep bugs away. They use ultrasonic sound or chemical spray. But if it is always ON then they use much electricity. To fix this a Timer Based Mosquito Repeller Power Saver Circuit is made. It turns repeller ON and OFF at set times by saving power. This also keeps repeller […]
Ultrasonic Mosquito Repellent Circuit
Mosquitoes are small bugs which are very annoying. They also spread bad sickness like malaria and dengue. This Ultrasonic Mosquito Repellent Circuit idea is to use high sound especially ultrasonic to above 20 kHz to scare mosquitoes. Ultrasonic sound can disturb them and make them go away. This simple circuit makes that sound. Mosquitoes do […]
Simple Triangle Wave Generator Circuit using IC LM358
In this this article we will learn how the triangle wave goes up, down, then up again and then repeats the same. It is special wave made from small waves called harmonics. It shape look like triangle because small waves match like bricks. Harmonics in triangle wave get weak fast and is not strong like […]