Telephone Line optical and sound Ring
Posted on Mar 4, 2013
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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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A flashing light of high brightness and short duty cycle is often desired to provide maximum...
The circuit allows you to eliminate the vocal portion of an audio signal, while leaving the...
This regulator delivers 90% efficiency at 12-V input, 5-V output. It uses an LT1158 and LT1431...
The device exhibits 24V at no load on pins +4, 5 and -7, 8. According to Wikipedia, this is...
The fridge cut in and the lights got brighter. I thought we were imagining it but we watched for...
A development board for practicing 8051 microcontrollers. The development board is simple one...
There is now no need for a separate camera and recorder - for less money you can buy an...
This is a simple single-zone burglar alarm circuit. Its features include automatic Exit and Entry...
This 5 volt regulated power supply circuit project is designed using the NCP3155 DC DC switching...
The motor controller is a custom built box that is a combination of custom printed circuit...
A speaker/microphone/transmit button circuit for the puxing 777 which probably works for all...
Your HVsupply will work, but for your own safety and to avoid accidental damage to your circuit...
750mW bridge-tied load audio amplifier circuit by the LM4065 amplifier with DC volume control IC...
AC-DC power supply without power switching circuit normally used for lighting load circuit, once...
As shown for the TRIAC dimmer circuit diagram, working principle is: power, 220V lamp VR4 R19...
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