PCB for Arduino Pro Micro 4-Relay User Interface Board
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Prices updated: 12 Oct 2026
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About this product
A bare PCB for building a 4-relay user interface board around an Arduino Pro Micro. The listing includes the bill of materials and a soldering guide, so the builder solders the components onto the board for a relay control panel project.
Specifications
- Board type
- Bare PCB
- Target controller
- Arduino Pro Micro
- Relay channels
- 4
- Included documents
- Bill of materials and soldering guide
Frequently asked questions
Does the board come with components already soldered?
No. It is a bare PCB, so you solder the components yourself by following the bill of materials and soldering guide included with the listing.
Which microcontroller board does it work with?
It is designed for the Arduino Pro Micro. Confirm the pin layout against the board's documentation and the soldering guide before connecting it to your Arduino.
