4 stars for: no documentation, overall okay processing and good price. Would buy again. A good product for quick use to turn on/off a simple load with a PIC microcontroller. Note that a 0V/GND signal on any input on the relay board will energize/activate the relay, while a 5V signal will de-energize the relay. The relays are listed for 30VDC / 125-250VAC, both 10A, but I've never been familiar with tiny screw terminals of this magnitude. The board has a set of "VCC/GND" jumpers. I believe this is used to bypass the circuit from the output stage of the optocoupler to the input voltage of the optocoupler. You could probably remove this jumper if you wanted to isolate power supplies, but I haven't tested that. Moving the jumper 1 position simply short circuits the board ;). Finally, attach some general dimensions of the device if you are building a case or mount for it.
REXQualis Comprehensive Starter Kit with Arduino MEGA 2560 & Detailed Tutorial for Arduino IDE Compatibility
11 Review
π Ultimate BBC Micro bit Sensor Starter Kit: Keyestudio 37-in-1 Box with Tutorial, Compatible with V1.5 & V2, Gift for Kids and Adults (Microbit Board Not Included)
11 Review
LAFVIN Super Starter Kit for Arduino R3 Mega2560 Mega328 Nano with Detailed Tutorial - Compatible with Arduino IDE
11 Review
π MCIGICM 2 Channel DC 5V Relay Module: Optocoupler Low Level Trigger Expansion Board for Arduino UNO R3, DSP, ARM, PIC, AVR, STM32, Raspberry Pi
11 Review
36-Pack Black Rubber PC CPU/Case Fan Screws/Rivets Set for Computer
11 Review
Glarks 660 Pieces Phillips Assortment Motherboard
10 Review
π§ Premium Repair Replacement Screws & Tools for MacBook Pro Retina 15"/13" - Complete Bottom Case Set
10 Review
M.2 Screw Kit: Easy Mounting for NVMe SSDs on ASUS Motherboards
19 Review