Electronic Doorbell Circuit
Posted on Mar 12, 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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Observing my "Boss" pedals and how they were switched on and off I figured there must be more to...
This fixed frequency triangular waveform generator driven by a TTL square wave generates...
The heart of the circuit is IC2, a 50240 top-octave generator. That device uses a single...
The circuit monitors and displays a digital signal"s duty cycle and provides accuracy as high as...
We assume that most of our readers are thoughtful drivers who do not switch on their rear fog...
Two op amps used in a bridge circuit configuration detect high and low light levels....
It uses good stability, precision to be high outputting the direct current stream source that can...
There are other chips or programs that do blanking and fading in from the side which is a cool...
With the storm season recently upon us, it`s not uncommon to switch car headlights on during the...
In some electronic applications we need to switch or control high voltages or high currents. In...
The RF modules used in this schematic are very simple, with only a few extra pins required for...
You can add as many extra zones as you like to the SCR Burglar Alarm System. The first circuit is...
Fans (Ceiling) Fifth gear speed control circuit shown in Figure 3-6. It uses capacitor step-down,...
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