Radio and communication circuits 2
Posted on Feb 4, 2014
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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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Here is a simple technique for measuring frequencies over quite a wide frequency range and with...
The circuit spectator interference enables implantation mono sound at any point between stereo...
The unit provides a square-wave output that is rich in harmonic content. The circuit"s output...
The uA2240 timer/counter, combined with aprecision resistor ladder network and an op amp, form...
Using this simple resistor circuit, you can trick your oscilloscope into displayin
The loads (2 or more solenoids in parallel) share a 12V supply and are individually switched to...
FM Wireless Microphone Schematic. In some applications, the use of the microphone cable is...
When your application requires no PWM (pulse-width-modulated) dimming or controlled frequency...
This schematic is for an extremely bare-bones circuit and includes only the needed components to...
This is a simple frequency counter based on a micro-controller PIC16F84. Its maximum working...
The PCB we have made is big and has plenty of space for cutting and adding other bits and pieces....
This is a simple hardware computer interface and Linux program which can be used to control the...
About PWM Class D audio amplifier, during the past half century, foreign miscellaneous Chi...
FIG, M is a variable speed motor control wicket opening and closing and opening. O electric...
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