Optoelectronic circuits
Posted on Feb 5, 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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LED's are great display tools. Their prices have decreased to a point where they are replacing...
These items were sold nationally several years ago. The fish would sing, open its mouth, turn its...
One of the unusual features of the out-of-production Programmable Drum Set was its use of touch...
Often the need to control light switch on the instrument. If napájíme LED source of low DC...
This generator will supply sine, triangular, and square waves from 2Hz to 20kHz. This complete...
You won't be disappointed with the performance of this sensitive ultrasonic receiver. It can let...
This circuit measures the power -supply current of a circuit without really having a currentshunt...
A 5.1-V zener diode clamps positive-going transients, and a Schottky rectifier clamps...
This converter enables a receiver that tunes 28 to 32 MHz to receive the 144- to 148-MHz amateur...
I am again here with another basic electronics projects, this time we are here to make our own...
This example shows how to use SPI communications to read data from a SCP1000 Barometric Pressure...
The video amplifier in the diagram is a well-known design. Simple, yet very useful, were it not...
It`s basically just an all-pass filter with two components added: a capacitor and a resistor. And...
Many application requires large number of keys connected to a computing system. Example includes...
This project is used to automate the home appliances through Bluetooth enabled PC. You can use...
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