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Hua HAI JI3PCS 2-Channel DC 12V Relay Module with optocoupler high or Low Level Trigger Expansion Board, Suitable for Raspberry Pi Arduino

4.7 (3) Write Review
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$5.99

$ 1 .99 $1.99

In Stock

About this item

  • Can set high or low level trigger with jumper, to meet the demand of more trigger applications;
  • This module features patch optical isolation, robust driving capability, and stable performance, ensuring reliable and efficient operation in a wide range of applications.
  • This module allows you to set the trigger to high or low using a jumper, providing flexibility in meeting different triggering requirements. It offers a stable performance and strong driving ability, ensuring reliable operations in a wide range of applications.
  • This product features a user-friendly interface design, allowing all interfaces to be connected directly via terminal wiring leads, making it extremely convenient. The design is flexible and easy to use, ensuring simple installation and reliable connections.
  • This product features a fault-tolerant design, ensuring that even if the control line is broken, the relay will not operate. This design provides added reliability and peace of mind, ensuring that your system remains secure and stable.



UJM81
Reviewed in the United States on March 15, 2025
I needed 2x compact 12V relays for a motorcycle application. One was for auxiliary lights, the other for a horn. I liked being able to switch the inputs from high to low for each relay independently, as the horn is low while the lights are high. While the wiring is somewhat cryptic, only one of these ever worked. The adage of you get what you pay for is correct, these were a waste of money.I used a Metri-Pack 280 8 terminal base and cover to accomplish the task.
John A. Justin
Reviewed in the United States on November 25, 2023
Part of my Arduino Uno based application involves driving a DC motor in both directions. I used the two relays to switch the plus and minus terminals on the motor from a signal coming from an Arduino digital output. When the output is at a low the motor turns clockwise (relay activated) and when high (relay inactivated) it turns counterclockwise. I noticed that the relays picked when the DC voltage supplied to the module was 6.1 volts minimum though it's specified as being a 12V relay. So, I'm driving the Arduino Uno and this module at 7V. The DC motor is geared down to run at 3RPM and is being supplied with the same 7V.
Scott
Reviewed in the United States on November 20, 2023
I was pleased with the performance of these relay modules for the price. They come on PCB expansion boards with screw terminals, making wiring simple. Compared to an Arduino R4 Wifi board in my photo, they are substantial in size. This matches their high current ratings but means they take up some space. The manufacturer page for the relay shows a max switching power of 240W. I used an additional power supply to power the DC +/- in and followed the recommendation not to run it from the USB that was powering the Arduino.I used them successfully for incandescent bulbs in a model train diorama without issue. They haven't been stress tested but seem sturdy. For the cost, they are versatile and in a convenient package. They ship in a no-frills, static-bag-only packaging.