Musical telephone ringer
Posted on Sep 10, 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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A serial interface and bias supply for the Seiko-Epson G1216N000 using an AT90S2313 because there...
Stabilised tendency of catering: Vcc=9~12V. Frequency of reception: 88~108MHz. Consumption:...
In the precision circuit, an operational amplifier provides a buffered output and also acts as a...
if the timer is triggered with a continuous pulse train in the monostable mode of operation, the...
The circuit is built around a 741 general-purpose op amp that is configured as a voltage...
In this laboratory experiment, we need to design the frequency determining network for a 1k Hz...
Black Beauty" is my nickname for this classy Bakelite set. Sporting a dramatic, assymetrical...
This is a design for fire alarm circuit. This circuit is based on a LDR and lamp pair for sensing...
The pulse width of the compact pulse cum frequency modulator can be varied by altering the...
This circuit is used to simulate the police car lights by alternating flashing strobes seen on...
A 96 ford explorer. My headlights do not work. I have low lights and interior lights. I have...
This is a circuit which can detect any motion or movement. It`s most common use is to detect a...
Great idea to remove the core of the HV-transformer, that increases the frequency and the step up...
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The inductive sensor is a simple enough device at the fundamental level. It is simply a coil of...
My site contains a few low power transmitters of one type or another, but until now no receiver....
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