Square-wave modulator has variable frequency and pulse width
New Circuits
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This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of.... -
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is.... -
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to.... -
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This.... -
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the.... -
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,.... -
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the.... -
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power.... -
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
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The ^generator output is rectified then filtered and applied between the positive supply voltage...
This strobe light operates from standard 120-Vac power. Rl limits the amount of current applied...
The following is my modification of the Headlight wiring for 240Z`s. I made this modification in...
This circuit utilising a 555 timer IC can be used as an alarm system to prevent the theft of your...
As shown, the audio ascribe is a microphone, which uses 2 x 2N3904 as the microphone audio...
Many circuits can be powered directly from the mains with the aid of a series capacitor (C1). The...
By using only two 2n2222 transistors, this small FM band transmitter can transmit its signal to...
This new design has replaced the old one. The design shown on this page is obsolete. The new...
A circuit diagram for a mini battery-powered version of roulette is shown, This circuit uses a...
It uses a relay control. The voice switch is characterized by: when the first clap, then through...
as the picture shows. BA313 is a built-in automatic level control circuit (ALC) of audio...
AD7s23 is an 8-bit multiplication DA converter, the output voltage of the analog input and the...
This project is a construction of a VHF-UHF linear amplifier that can work at frequencies from...
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