Low-voltage-indicator
Posted on Feb 27, 2013
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 audio amplifier circuit, connected to 32 Ohm impedance mini-earphones, can detect very...
Here exist a small collection from three generators, what using crystal for basic production of...
This simple circuit from the May 1996 Think Tank column of Popular Electronics activates a relay...
Transistors Ql, Q2, and Q3 monitor the two outputs of the stereo amplifier. If the offsets...
This circuit uses Analog Devices` AD639 universal trigonometric function generator to convert a...
Setup the lights on the breadboard like a traffic light. Red on top, then yellow, and then green....
This is my first successful vacuum tube project. The output of this small amplifier in which a...
How many times you needed some remote control to handle some electric device many times. There...
We have designed a walkie cardiotachometer, it can substitute and carry on the metric classic...
A common piezoelectric alarm, such as the Murata (Smyrna, GA) PKB5-3A shown, has many valuable...
Wireless FM Transmitter. The site has some explanation on how the circuit works, however I`m not...
This MP3 Player FM transmitter can be used to listen to your own music throughout your home. The...
Circuit consists of an oscillator with variable frequency, a divided frequency and measurement...
I picked up an LM386 Low Voltage Audio Amplifier. A little poking around and I found National...
A. B, C for big power split phase I, A + BC Rang generator phase line, A-A indole path string has...
Discrete components 13TL amplifier, the circuit structure is complex, with an integrated power...
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