Touch Switch Driver
with LED
(Fully Assembled PCB)

Product Use

This 12 VDC Relay Driver is especially developed for Automotive use, allowing microcontroller to switch on common automotive relays with 12 VDC coils.

Command Signal of low current at low voltage (Typically 1 milliAmpere @ 3 V to 5 V DC) into the Relay Driver electronically switches ON a Higher current Load (up to 1A) at typical automotive system voltage (10 VDC to 14.4 VDC).

In constant ON applications it can carry up to 1 Ampere load, while in pulsed applications up to 2 Amperes may be switched ON momentarily.

The 12 VDC Relay Driver can be used to switch on automotive type relays, which can then control lights, fans, motors and other devices ON/OFF while keeping them isolated from the microcontroller.

The LED located on the PCB is ON when the Output Pin (To Relay 85-) is connected to Ground (GND).

Control Input can be connected directly to any output pin of PARALLAX PROPELLER microcontroller without need for any resistors.

This 12 VDC Relay Driver also has an alternate use as a Touch Switch Driver.


Relay Driver with LED Assembled PCB


Click the image to enlarge.

Touch Switch Driver with LED connection diagram


  1. Vbb 12 VDC +
  2. CIN = ON Command Signal from Touch Plate
  3. GND (Common System Ground)


  1. To Relay 86+ = Vbb 12 VDC +
  2. To Relay 85- = Relay ON (Switched to GND)
  3. GND (Common System Ground)

Connection Diagram Sheets in PDF
PDF Icon RDR-1

Product Specifications

Relay Coil source voltage (min/max) VDS 8 / 16 V
Relay Coil load current (max) IL 1 A
Command Signal Voltage (min/max) VC 1.3 / 6 V DC
Command Signal Voltage (recommended) VC 3.3 to 5 V DC
Power Consumption (LED) Pon 160 to 210 mW
Operating Temperature Ton 20 to 140
-6 to 60


US $5.00 each

Inquire for pricing and availability on purchases of 100 units or more

Other Uses
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