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Remote control using VHF modules Introduction

2015-03-02 04:46  
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This article is remotely controlled using VHF module description. By convention, in order to better grasp the principles you are, we recommend you to combine text read schematics. Miniature transmitter module shown in FIGS. 1, it just measures 34 mm x 29 mm x 10 mm, can be used to operate all remote control receiver and switch combinations described in this project. A compact 9-volt battery can be used with the transmitter preview. It can transmit a signal to 15 m without any air. The transmitter operating frequency is 300 MHz. The following circuit, using VG40R remote receiver module measuring 45 mm x 21 mm x 13 mm, can be used to: (a) the relay is activated instantly, (b) the relay is activated as the default period, (c) open and close a load. Note: The length of the short shielded cable should be used VG40R receiver output modules and the rest of the circuit. And 9 v battery transmitter must be placed in a non-metallic (say, plastic) cabinet largest range of operation. Activate a relay moment (see Figure 2), the switch at the transmitter unit, so that a positive voltage output of the module obtained VG40R pin. This voltage is biased to the relay driver transistor. This relay is activated, pressing push the micro switch on the transmitter unit. This relay remains vibrant, as long as the switch remains pressed. When the switch is released, the relay is deactivated. Any electrical / electronic load can be connected via N / O contacts of the relay. Activate relay is preset period (see Figure 3), the switch in the transmitter unit by moments. Transistors are biased base VG40R module. As a result, the transistor and apply a trigger pulse, IC 555, which is wired as a monostable  multivibrator . This relay remains activated until the scheduled time is over. Time delay can be transformed from a few seconds to a few minutes by adjusting the timing of components. Opening and closing a load (see Figure 4), a circuit 555, and to use a decimal counter circuit 4017. Here, the 4017 IC connected as a trigger for the elbow movements. This is accomplished by connecting the output to reset terminal Q2 and Q1 output are unused. Q0 output is used to consolidate the relays. This relay is activated and deactivated by the transmitter switch alternately. Therefore, the start load, simply press the transmitter switch once, temporarily. Torch relay will remain active. To turn off the relay, press the transmitter switch. This process can be repeated. Time delay monostable multivibrator is set to 1 second. If you are a first reading on this principle, we recommend that you carefully read several times in order to better fully grasp this simple but effective circuit.

Remote control using VHF modules

Remote control using VHF modules

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