Remote controls are part of an electronics device used for operating the device remotely. Remote control has continuously evolved and advanced over recent years. The technologies likebluetoothconnectivity, motion sensor enabled capabilities and voice control have been included to remote controls. Here we are going to build a remote control. This r
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emote control could be used for controlling robo cars, helicopters or for switching home appliances. Normal remote controls use IR transmission, butinthiscaseRF transmission is used. Transmission through RF is better than IR (infrared) because of many reasons. Firstly, signals through RF can travel through larger distances making it suitable for long range applications. Also, while IR mostly operates in line-of-sight mode, RF signals can travel even when there is an obstruction between transmitter & receiver. Next, RF transmission is more strong and reliable than IR transmission. RFmodule: For the transmission of control signals (here DTMF signals) we need a RF transmitter and a receiver. FM transmitter and receiver pair or any kind of RF TxRx module will do. In this remote control ASK modulation based RF transmitter & receiver pair are used for transmitting signals. Get information about ASK module : click here. . IC UM91214b( DTMF TONE GENERATOR): This is a single single chip IC with an on-chip oscillator for a 3. 58Mhz crystal. This is capable of generating Dialing Pulse(DP) and Dual Tone Multi Frequency(DTMF). But we don`t need to be bothered about DP generation. All you need is just to generate DTMF signals. A keypad interface is necessary to generate different DTMF signals. The advantage of using UM91214b is its inbuilt keypad interface facility. You just have to connect the keypad pins to UM91214`s Row & Column pins....
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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