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SainSmart 8-Channel 5V Solid State Relay Module Board for Arduino Uno Duemilanove MEGA2560 MEGA1280 ARM DSP PIC
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- Enter your model number above to make sure this fits.
- Has been assembled, and electrical test passed.
- Led indicator for each relay.
- FR-4 Fiber glass PCB (Double Layer); Size: 155 x 55 x 24 mm (approximately 6.1 x 2.17 x 0.95 inch)
- Input control signal voltage: 0V - 0.5V Low stage (SSR is OFF), 0.5V - 2.5V (unknown state), 2.5V - 20V High state (SSR is ON); SSR Output (each channel); Load voltage range: 75 to 264VAC (50/60Hz); Load current: 0.1 to 2 AMP
- Standard interface that can be controlled directly by microcontroller (Arduino , 8051, AVR, PIC, DSP, ARM, ARM, MSP430, TTL logic)
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NOTE: This uses a triac; so it's not going to work for switching on direct current loads. I verified that with a quick test. It works great for AC loads, but is not designed for DC loads. If you need to control DC loads, then you'll want to purchase the mechanical relay board also made by Sainsmart.
A schematic of how each relay is wired is given at the Sainsmart website. Based on that and some measurements I've made, here are some features that aren't obvious from the description.
1. Each relay is protected by a fuse. Granted, the fuse is hard-soldered to the board; so if you blow the fuse, you'll have to de-solder and re-solder a new fuse in place, but that's not a huge problem. Protects each circuit from drawing more than the 2 amps that the relay is rated for.
2. The signal from the Arduino doesn't cut on the relay directly. Instead, the signal from the Arduino turns on a transistor, which closes a circuit that turns on the relay. The relay itself is optocoupled; so there is plenty of electrical isolation between the Arduino board and the relay. No worries at all on my part about frying my Arduino board.
3. Each relay draws about 10 milliamps from the Arduino when switched on. If you're only turning on a few relays at the time, that is not a problem for the Arduino to handle.Read more ›
Part # 0251002.MXL
But, with this Solid State version, it is ACTIVE HIGH, so a reboot or power outage of the Pi does NOT trigger the relay (which is what I want). This is a great relay and I highly recommend it if the specs fit your needs.
Update: Well, it's a few days past Xmas and not a single problem from any of the SSRs. I love that I can program the outlets to turn on and off at less than 25ms (the limit I found for mechanical relays). This allows twinkling effects that I couldn't do with mechanical relays. I'm purchasing another one for a 16 channel setup and adding a San Devices e682 to the mix for RGB LED control as well (my neighbors will REALLY love me next year). I use an Arduino Uno to control the relays however any microntroller with at least 8 digital outputs will work well with this relay board.
I have not put it into use with 110VAC yet. (J Fuller, I would LOVE to see how you wired this up)
From the LED status it's working PERFECTLY with an Arduino board and Vixen. It took 5V and a ground (provided by the Arduino in the "POWER" section on the Mega 2560 board), and I have no ground in the "GND" connection on the main 9-pin screw-down connector.
In short - this board, combined with Arduino and Vixen greatly simplifies these "amazing displays" that you see all over YouTube.
Most Recent Customer Reviews
The description of this item is not correct. It gives the impression that is for Arduino boards only which is not true. This board can be controlled by any micro-controller. Read morePublished 22 hours ago by ITAlex
Best solid state relays ever, they are sturdy, well manufactured, no lose components, works great and easy to use for any project.Published 1 month ago by Javier Espada
Initially bought this to replace the one I had from last year on my Raspberry Pi light show. Turns out that I didn't need it. Read morePublished 1 month ago by Don
Excellent Relay!!!. I created a Christmas Lights Project and connected my Raspberry Pi to this relay and it worked like a charm. Read morePublished 2 months ago by Naveen Noel J
Being driven from a Raspberry Pi2, Doing exactly what I bought it for!Published 2 months ago by Robert
very bad board. Honorable solid state relays. omrons relay are full of melted plastic inside and pcb inside. relay coils are square and unregulated voltage. Read morePublished 4 months ago by Opaz