315Mhz remote relay switch kits - 2 channels


This remote switch allows you to remotely control any 12 Volt DC device. Perfect for controlling any 12V devices such as Lights , Fans,Landscaping Lighting and more. This easy-to-wire kit is perfect for anybody with a basic knowledge of electrical wiring, and can easily be wired to many 12V applications. For PC Modders, the end of result of the Remote Control 12VDC kit are truly impressive and are sure to ooh and ah the crowds. For DIYers, the kit will give some magical effect to your projects.


  • Frequency: 315Mhz.
  • Modulation: ASK
  • Working Voltage: 12VDC
  • Receiver Sensibility: -105dbm
  • Emission Distance: 100m in open ground
  • Size: 68mm47mm12mm
  • *Defaultly 315Mhz receiver, exchangable with 433Mhz receiver.

Pin definition and Rating

Each Relay owns one group of 3 pins:
  • A - Normally Closed, Open When Relay activate
  • B - Common Node
  • C - Normally Open, Close When Relay activate


Encoding and Decoding

The popular link is like this: MCU -> Encoder -> Transmitter ------ Receiver -> Decoder -> MCU,
PT2262(Encoder) and PT2272(Decoder) are optional, their existence is to
1)avoid confusing when multiple RF links in range
2) isolate disturbance. You can integrate the encoding and decoding work to the MCUs on both side. Whenever there is no 315Mhz devices around, you may use it as direct cable connection.
To setup a PT2272 and PT2262 link, you would need to set PT2262 by a little soldering:
And setup the corresponding pins on PT2272:

Relay Operation Modes

The receiver has three modes that control how the relay outputs function. These modes are user selectable using the 3 pin jumper on the receiver.
Momentary: Move the switch position to “M???to set the selected relay(s) in momentary mode. In momentary mode, the selected relay(s) will change it’s state and maintain it for the duration of the transmission received. Once the transmission is terminated, the relay will change back to its original state.
Flip-Flop: Remove the shunt to set the selected relay(s) in Flip-Flop mode. In Flip-Flop mode, the selected relay(s) will change its state and maintain it until a matching transmission is received. Every time a transmission is received the relay will change its state and maintain it until another transmission is received.
Latching: Move the switch position to “L???to set the selected relay(s) in Latching mode. In latching mode, when the selected relay is activated by the transmitter, that relay will change it’s state and maintain it until power to the receiver is removed or interrupted.
Please refer to the simple drawing for the 315Mhz RF link. On the transimitter side, You would need to supply 3-5VDC to the “+12V” pin,(Caution: the 12v is an error silk screen on PCB, never give it more than 5V), and set “TE” high(5V) to enable transmission. On the receiver side, you may use +5VDC(aka VCC) for power and read the output from D0~D3. “TV” will indicate thenever there is changed data incoming.


Help us make it better

Thank you for choosing Seeed. A couple of months ago we initiated a project to improve our documentation system. What you are looking at now is the first edition of the new documentation system. Comparing to the old one, here is the progresses that we made:
  • Replaced the old documentation system with a new one that was developed from Mkdocs, a more widely used and cooler tool to develop documentation system.
  • Integrated the documentation system with our official website, now you can go to Bazaar and other section like Forum and Community more conveniently.
  • Reviewed and rewrote documents for hundreds of products for the system’s first edition, and will continue migrate documents from old wiki to the new one.
An easy-to-use instruction is as important as the product itself. We are expecting this new system will improve your experience when using Seeed’s products. However since this is the first edition, there are still many things need to improve, if you have any suggestions or findings, you are most welcome to submit the amended version as our contributor or give us suggestions in the survey below, Please don’t forget to leave your email address so that we can reply.
Happy hacking