![]() ![]() Once the assembly of the transmitter circuit is done, its working should be confirmed by switching ON the transmitter and by verifying the received signals over the FM radio. ![]() This helps to make the transmitted waves much stronger and travel up to longer distances. The section consisting of the IC UM66 and the electrolytic capacitor forms the modulating stage and injects the required modulation signals to the RF stage. Using a Music Modulation for Increasing Transmitter range T1 along with the pF capacitors and the inductor forms the RF stage and is responsible for the generation and transmission of the RF carrier waves. Here the inductor becomes the most crucial part and must be made carefully as per the given instructions. The figure shows a very simple FM configuration using one transistor and few other passive components. Making the FM Transmitter for the Remote Control Unit: The two sections together can be used for controlling any electrical load remotely from any part of the house. The transmitter can be simply made by assembling a few electronic components. However a simple homemade FM remote control can be made by modding your existing FM radio as the receiver part. Remote control circuits are not so easy to build as they incorporate critical inductor stages and also, the components are difficult to procure. This remote control system enables the user to get an ON/OFF control on any desired appliance, by simply modifying an existing radio into a remote receiver through a relay control circuitry. ![]()
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