TX118A 4 Channel 433Mhz Transmitter

4 Channel 433Mhz Transmitter TX118A

Wireless Communication 25-100meter EV1527 Remote Control

     The TX118A is a small RF transmitter (remote control transmitter) module with 4 key inputs, transmitting in the 433MHz band. When one of the K1, K2, K3 and K4 inputs on the board is pulled to ground (-) by a button or a control circuit, the module sends the EV1527 code of that input wirelessly. This adds 4 channel wireless sending to your own remote, panel or device.

     It operates on DC 3.3V - 5V and draws 10mA while transmitting and less than 3µA in standby; for this reason it can be used in battery powered remotes. The transmitter power is 11dBm and the modulation is ASK; the 13.560MHz crystal on the board provides the 433.92MHz transmit frequency. Each module has its own ID address code (EV1527, 20 bit); the chance of mixing with other transmitters in the same environment is very low. There is an indicator LED on the board.

     This listing is for the transmitter only; a receiver that can learn the EV1527 code is needed to receive the signal. When used together with the RX480-E 4 channel learning receiver, the 4 inputs of the transmitter control the 4 outputs of the receiver separately. For the antenna, a 24cm copper wire is wound as a spiral and soldered to the ANT pin.

Key features:

     4 independent channels: The K1-K4 inputs send separate key codes; it works like the 4 keys of a remote and controls 4 separate outputs on the receiver.

     EV1527 code with module ID: Each module has a different ID address code; receivers that learn EV1527 codes recognize this transmitter; the chance of mixing with other transmitters in the same environment is very low.

     Very low standby current: It draws less than 3µA in standby and 10mA while transmitting; it saves the battery for a long time in battery powered remote and sensor circuits.

     Simple connection: One end of the button is connected to the K input and the other end to the - (GND) pin; the encoder IC is on the board, no extra circuit is needed.

     Crystal controlled 433.92MHz: The 13.560MHz crystal keeps the transmit frequency stable; it is compatible with 433MHz learning receivers.

Features:

• Product type:    4 channel 433MHz RF transmitter module (transmitter only)
• Model: TX118A
• Frequency: 433MHz (433.92MHz; 13.560MHz crystal on the board)
• Encoding: EV1527 learning code; separate ID address code in each module
• Number of channels: 4 (K1, K2, K3, K4 inputs)
• Triggering: the code of a channel is transmitted when its K input is pulled to ground (-)
• Operating voltage: DC 3.3V - 5V
• Transmitter power: 11dBm
• Modulation: ASK
• Operating current: 10mA (while transmitting)
• Standby current: less than 3µA
• Range: depends on antenna, receiver, supply and environment; about 15m with the RX480-E receiver
• Indicator: On-board LED
• Pins: ANT antenna, K1-K4 key inputs, + supply (DC 3.3V - 5V), - ground (GND)
• Antenna: 24cm copper wire wound as a spiral and soldered to the ANT pin
• Compatible receivers: RX480-E 4 channel learning receiver and 433MHz receivers that learn EV1527 codes
• Material: Green PCB, 7 pin male pin header
• Dimensions: about 18mm x 18mm

Usage information:

• Apply the supply to the + and - pins (DC 3.3V - 5V). Connect one end of each button to one of the K1-K4 inputs and the other end to the - (GND) pin; the code of that channel is transmitted as long as the button is pressed.
• To trigger it from a control circuit, pull the K input to ground with the output of a circuit running on the same supply or with a transistor.
• For the antenna, wind a 24cm copper wire as a spiral, solder it to the ANT pin and keep it away from metal surfaces.
• Pairing with the RX480-E receiver: press the learning button of the receiver 1 time (momentary), 2 times (self-locking) or 3 times (interlocking); when the LED lights, trigger any K input on the transmitter. Learning is complete when the receiver LED flashes 3 times.

Areas of use:

•  Garage door and garden gate remote control
•  Roller shutter, blind and curtain motor control
•  Socket and lighting on - off
•  Device control with a relay board
•  Alarm system arming - disarming and panic button
•  Light and LED strip control
•  Toy car and model vehicle remote control
•  Home automation and wireless wall buttons
•  Custom wireless remotes and control panels

Precautions:

•  This product is a transmitter only; the receiver module is not included in the package. A 433MHz receiver that can learn the EV1527 code (e.g. RX480-E) is needed to receive the signal; it does not work with receivers that cannot learn EV1527.
•  The supply voltage is DC 3.3V - 5V; do not apply a voltage above this range.
•  Without an antenna the range drops sharply. The range depends on the antenna, receiver, supply voltage and environment (walls, metal); at 3.3V supply the transmit power and range are lower than at 5V.
•  EV1527 is a fixed ID code system, not a rolling code; do not use it as the only security measure on locks and doors that need high security.

Package contents:

•  1 Piece TX118A Transmitter Module
•  1 Piece 7 pin male pin header ( Assembled )
•  Note: Antenna wire, buttons, receiver module and power supply are not included in the package.