Mosquitoes are often seen as annoying little pests and they can be a big health threat because they spread diseases like malaria and dengue fever. The main idea behind this circuit is that certain sound frequencies especially ultrasonic ones (which are above 20 kHz) can keep insects like mosquitoes away. One effective way to repel […]
Oscillator Circuits
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Simple Triangle Wave Generator Circuit using IC LM358
A triangle wave is one that rises, falls, rises again, and so on. It is a unique type of wave composed of harmonics, which are smaller waves. The triangular shape is formed by stacking these smaller waves, which are similar to building bricks. The harmonics of a triangle wave weaken far more quickly than those […]
Simple Function Generator Circuit using IC L8038
An integrated circuit called the IC L8038 is used to produce somewhat twisted waveforms such as sine, square, and sawtooth waves. It functions by adjusting the frequency, which is adjustable between 0.001Hz and 300 KHz using an external timing capacitor and resistor. It is able to modulate and sweep frequencies using an external voltage input. […]
Simple Frequency Divider Circuit
As the name implies, a simple frequency divider circuit is a circuit that accepts a signal at one frequency and produces a signal at a lower frequency. This is accomplished by applying a certain element of manipulation to the incoming signal to lower its frequency. Two widely available digital ICs may be used to construct […]
Simple White Noise Generator Circuit
A easy circuit for a white noise generator is a DIY electrical design that simulates the sound of static or hissing that you would hear when switching radio stations. Applications for this noise include sound effects creation privacy sound masking and audio equipment testing. The circuit takes use of the intrinsic electrical noise that exists […]
Analog to Digital Converter Circuit using IC 555
A simple method of converting an analog voltage signal (from a sensor) into a digital signal (ones and zeros) that microcontrollers or other digital devices can understand is to use an analog to digital converter ADC circuit that uses a IC 555. Because it is inexpensive and simple to construct, it is an excellent learning […]