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Pin Vcc – Positive power, 5VDC
Pin GND – Ground .
Pin D0 to D3 – These are the output pins which you should connect to device you like to control.
Pin VT  – Valid RF signal indicator pin. When receiver receives valid signal this pin will goes high.

IC2272 315MHz 4 Channel Wireless RF Remote Control Transmitter Receiver Module


Remote control:

Operating voltage: DC 12V (27A / 12V battery x 1)
Operating current: 10mA at 12V
Radiated power: 10mW at 12V
Transmission distance: 50m - 100m (open field, the receiver sensitivity of -100dbm)
Transmitting frequency: 315MHZ
Modulation mode: ASK (Amplitude Modulation)
Encoder types: fixed code

Decoding Receiver board:

Operating voltage: DC 5V
Receiver sensitivity is -98dB
Leg 7 bits: VT, D3, D2, D1, D0, +5V and GND
VT is a valid signal high output pin upon receiving a valid signal, the pin output high, may also drive the relay
Size: 6.6 x 22 x 41mm

There are four buttons on the remote control, and respectively correspond to the four data bits to the receiving board output pin D0, D1, D2, and D3.
Press the buttons transmit signals, the corresponding data bit is output high.

This Simple RF transmitter and receiver is the easiest way possible to add wireless control, painlessly! There's no programming, configuring or addressing - simply power the receiver with 5v DC and press the buttons on matching RF keyfob remote.

When button A is pressed, it activates the first pin on RF module (Receiver) - D0, when button B is pressed, it activates the second one (D1), and so forth for all four buttons. There's no microcontroller required, its just a simple one-to-one link.

The RF module make it easy to control your project once its in an enclosure or from across the room, but there are some things to watch out for.

• 1st is that they do not have 'addressing' - if you have multiple receivers in a room, they'll all work at the same time with a single remote.

• 2nd is that there's no error checking or bi-directional link - that means the remote doesn't know if the module received the message or not.

• 3rd, there are a few different types of receivers and each one looks identical but they're act differently!

This is T4 toggle type acts like an alternating toggle switch - when button A is pressed the first time, the matching pin goes high. When button A is pressed the second time, the matching pin goes low. The pins are turned on and off by repeated presses.

The M4 momentary type acts like a push button - when button A is press down, the matching pin goes high. When button A is released, the matching pin goes low. The pins only go high when a button is pressed.

From test that we did, the control is good within 8 meteres with line of sight. Also please use battery instead of adapter. We notice using adapter (AC to DC) will greatly decrease the range.

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