Light Controlled Relays
Posted on Aug 19, 2012
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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This unique circuit makes your dome light look cool. Usually when the car door is closed, the...
For FM demodulation applications where the bandwidth is less than 10% of the carrier frequency,...
The circuit illustrates a method of interfacing a HEDS-1000 emitter-detector pair with a HA-5144...
When the switch is closed or the FET is conducting, the circuit behaves as an inverting amplifier...
Displays are always nice. So far I`ve just been demonstrating how to use 7-segmented displays to...
To operate a small motor used for opening and closing a pair of curtains. DC motor has six basic...
Most PC enclosures provide only a single LED to indicate hard disk access, with the LED being...
This is a very simple square wave generator circuit built with IC 74LS00 that can generate square...
If you are lucky enough to have a big house, a large garden, and small children, this project...
This setup is quite messy in terms of wires, so I`ve decided to remove both from their respective...
As shown for the basic application circuit thermistor. Figure (a) of the basic temperature...
Another common single five lamp drive circuit is: LB1416/26/36, the circuit is a double row of...
As shown in the simplified block diagram of the high sensitivity of the alarm circuit, wherein...
As shown is BA6104 Five-digit LED level meter driver IC basic application circuit if the level...
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