Wireless Interface RF Modules Circuit


Posted on Feb 7, 2014    7051

The RF modules used in this schematic are very simple, with only a few extra pins required for power, ground and data. The main parts used in this schematic are the RF transmitter module, RF receiver module, 18F452 and 18F4520. You can see them below, as well as the specific circuits described in more detail. Since there are two seperate circu


Wireless Interface RF Modules Circuit
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its, both need to have a power supply circuit. The power supply in both circuits is identical, a LM7805 takes battery input and regulates it down to +5v. The DC filtering capacitor cleans up any noise off the +5v output. The only difference for this part of the circuit is that the receiver uses the RX pin (PORTC 7) on the PIC and the transmitter uses the TX pin (PORTC 6) on the PIC. Both of these data lines connect to the data pin on the transmitter or receiver module. These two modules are in charge of passing the data from one link to the other without adding too much error. We`ll see later in the theory section how the receiver module can be altered to help correct distortion.




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