church bell with timer and LCD
Posted on Feb 19, 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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The clock circuit above uses seven ICs and 19 LEDs to indicate binary coded decimal time. The...
The FM transmitter is relatively simple to build and with only one adjustment it is ideal for the...
The brightness of the surrounding light controls the function of this circuit. The light sensor...
A very simple single sideband (SSB) suppressed carrier demodulator (product detector) circuit can...
About a do-it-yourself alarm arrangement body with PIC18F452. It`s a abundant amusement activity...
This simple circuit tests speakers, microphones, transformers and voltage. It`s basically a very...
yeah, you really need some current limiting. i use open frame linear supplies for charging...
Need more current If you`ve got a larger motor waiting to be used, the Pololu High Current Motor...
This is a very simple RF transmitter circuit that consists of the Holtek HT-12E encoder chip and...
A stepper motor is a motor controlled by a series of electromagnetic coils. The center shaft has...
The FM Remote Control Receiver` (available on this website in Infra-red circuits section) has a...
This example is a particularly strong sense of jumping novelty lights, flashing its control order...
This transmitter with a good antenna and under proper conditions of use may have a range of more...
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