This is the ultimate industrial remote control with 16 different channels and a very high range of more than 1 Km. Let us see the main features of this remote control system: Single chip DTMF based FM transmitter with 16 different channels. Programmable, multi functional, DTMF based FM receiver because of 89C51. Perfectly suits with…
Remote FM Bell (and Switch)
This is very interesting project. It is same as commercial available wireless FM bell but with sweet melody output. It can also be use to operate any AC/DC device from remote and safe place. The range of this remote control is up to 50 meter (basically this depends upon your FM transmitter if you use higher power…
FM Transmitter
The above circuit is a simple VHF FM transmitter circuit. It is basically a VHF colipits oscillator capable of transmitting sound or music to any standard FM receiver.The circuit works on a small 9V battery which makes it easily portable. It also has a capacitor microphone which picks up very weak sound signals. The output frequency…
Difference between AM and FM
In radio communication, the message signal wave (low frequency) is combined with a carrier signal (high frequency). In this combination, one or more characteristics of the carrier wave are varied with respect to message signal. This variation is termed as modulation and it is needed so that message can be transmitted over long distances and…
FM Remote for Toycar
This is very much interesting application and I think you will surly build it. Any battery powered toy car can be made to run or stop from a remote place (around 100 mts) using this remote. Because it is RF remote you can operate your toy car through the obstacles (like wall, partitions etc.). So it…