The proposed remote control circuit idea can be used for controlling any electrical gadget within a range of 100 meters. Since the idea here is to modify an existing circuit of a remote bell unit, becomes super easy without any complications. However the construction part does require the involvement of electronic assemblies so this project ma
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y not be considered entirely a layman`s project. We all have seen and probably used remote bell gadget in our homes. The device is basically a wireless RF receiver and a transmitter set which can be used for producing alarm sounds remotely for calling or indication proposes. The receiver unit positioned anywhere within this limit instantly plucks the trigger and switches the in built musical bell, sounding the alarm. The trigger may last for a few moments even after the transmitter is switched OFF. If we are able to mod the receiver part of the unit so that the received trigger can be used to operate a relay instead of the usual alarm, our job is done. However before we indulge into the modification process, it would be necessary to make the Flip Flop circuit first, which would be later on required to be integrated with the receiver set of the remote bell. The flip flop section is a very simple configuration consisting of just a single IC and a few other passive components. The entire circuit may be buikt over a small general purpose board with the help of the shown schematic. You will find a small speaker connected via a couple of wires which terminate from the circuit board of the unit. Just cut-of the wires from the speaker, remove the entire circuit from its housing and screw it inside a new housing, which should be relatively bigger in size so that it can accommodate the flip flop section, the transformer power supply...
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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