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Dual Relay Board Kit

Product Code: 27114
Excl. VAT: £23.79 Incl. VAT: £28.55
You will earn 23 Robo Points for buying this product
Once assembled, the Dual Relay Board Kit allows you to control two high-power devices up to 8A each via the included Omron mechanical relays.

The Dual Relay Board can be used to turn lights, fans and motors on/off while keeping them isolated from the microcontroller. Independent control of each relay is provided via a 2 x 3 header making it friendly with servo cables and providing a convenient connection to many development boards, such as the Board of Education, Propeller Board of Education, Professional Development Board and Propeller Professional Development Board. LEDs indicate relay status.


  • Comes as a kit providing lower cost
  • Control two high-power devices with one kit
  • Provides isolation between microcontroller and device being controlled
  • Easy screw terminals for relay contact and power connections
  • 3-pin servo style headers for easy connection using standard servo cables
  • LED indicators provide status of each relay

Kit Includes:

  • (4) 2 Position Screw Terminal Block (452-00012)
  • (1) Connector, Header, 2 x 3, 0.1", Straight (450-00105)
  • (2) Omron Relay G2RL-14-DC12, SPDT, 12 A, 12 VDC (400-00052)
  • (4) Resistor, 1K, 5%, 1/4 W, CF (150-01020)
  • (2) LED, Red, T1-3/4 (350-00006)
  • (2) 1N4004 Diode, Rectifier, 1V, 400V, 1 A, Axial (501-00006)
  • (2) 2N3904 NPN Transistor, TO-92 (500-00008)
  • (1) Raw PCB, Dual Relay Board (300-27114)


Application Ideas:

  • 12 VDC automotive applications
  • HVAC duct/damper control



  • Control signals are 3.3 V/5 V compatible
  • Voltage requirements: 12 V
  • Current requirements: 85 mA
  • Communication: TTL/CMOS Logic (high/low)
  • Dimensions: 2.3” L x 1.8” W x 0.7” H (58.4 x 45.8 x 1.8 cm)
  • Operating temp range: -40 to +185 °F (-40 to +85 °C)


Product Attachments

View FileDual RelayBoard-v1.0    Size: (932.67 KB)
View FileDual Relay Board Kit Schematic    Size: (62.24 KB)
View FileOMRON PCB Relay Datasheet    Size: (941.26 KB)
View File27114-BASICStampExample    Size: (345 Bytes)
View File27114-SPIN Example    Size: (488 Bytes)

Whenever possible, items which are in stock are dispatched the same day, or the next working day.

Large and/or heavy items are dispatched by UPS courier service and these orders must be placed before 15:00hrs (GMT) to ensure same day dispatch.

Small items are normally sent using a Royal Mail service for UK orders, and International Airmail or UPS for overseas orders

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Dual Relay Board Kit

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