LED operates as light sensor
Posted on Nov 11, 2012
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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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This page describes how to build this full-bandwidth single-port (one input and one output) MIDI...
This circuit is mainly intended to provide common home stereo amplifiers with a microphone input....
The JFET Pierce oscillator is stable and simple. It can be the clock of a microprocessor, a...
This compact metronome will run for years on a single nine-volt transistor battery. Has both tone...
This indicator is basically a switch with hysteresis characteristics. If the input voltage...
This gauge uses a sensor in conjunction with R1 to develop a dc voltage proportional to oil...
This is a project that I always wanted to do, but managed to put off for a long time. It has been...
This document has several purposes, and a primary one is to record what I have learned about the...
This circuit is intended to signal, through a flashing LED, the exceeding of a fixed threshold in...
The input resistance of a. c. -coupled op amp circuits depends almost entirely on the resistance...
Equalizer a passive or an active electronic element or circuits (like tone control) used for the...
This is a good Electrical project report on Infrared Remote Control On/Off Switch and was...
Designed the same thing but for the reason of having a higher output voltage swing for the mono...
Electronic equipment is not `cheap` and can be damaged in a number of ways, by electro-static...
A simple project to use an Arduino to rotate a GH-2 on a fluid head by set degrees to take 360...
AC solenoid driven control with SSR principle is shown in Fig. The switch is closed SW1,220V AC...
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