Telephone Ringer
Posted on Feb 7, 2014
Related Circuits
New Circuits
-
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.....
.
This version sports a 2nd audio amplifier stage at Q3. The output level with this version is...
The TMP03* is a complete temperature data-acquisition system on a monolithic silicon chip....
This is an experiment on the closed loop DC servomotor control system (SMC). It will able to be...
The computer needs at least 180 millivolts peak-to-peak and the condenser microphone in my...
The Ping is an ultrasonic range finder from Parallax. It detects the distance of the closest...
This circuit diagram shows how a 555 timer IC is configured to perform as an astable...
4QD manufacture motor speed controllers so all our H bridges are PWM. Here`s a simple switch...
As the market strives for lighter, more compact wireless and portable devices with more ingenious...
This article describes a 2 meter amplifier capable of running 25-30 watts output. More than 35...
On a continuing mission to build an autonomous sailing robot we needed a way to more rapidly...
Characterized by a steady flow of power when the power supply voltage fluctuations or load...
Dual power for each load refers to work simultaneously by the two-way power supply and two power...
Fans can achieve remote control switch, speed control, remote control can also be achieved in...
characters left: