Your 5V system can wield great power with this big, beefy relay board. How does 10A on the NC contacts and 20A on the NO contacts at 220VAC sound? The SparkFun Beefcake Relay Control Kit contains all the parts you need to get your high-power load under control. Only minimal assembly is required!
The heart of the board is a sealed, SPDT 20A/10A Relay. The relay is controlled by 5V logic through a transistor, and an LED tells you when the relay is closed. This is a kit, so it comes as through-hole parts with assembly required, which makes for some nice soldering practice. Screw terminal connectors on either side of the board make it easy to incorporate into your project.
There are some pretty beefy traces connecting the relay to the load pins, but the 3-pin terminals are only rated for 15A max! If you plan on connecting a larger load, you'll need to solder directly to the board. As always with high current and voltage, play it safe and use your judgment when deciding how much of a load you want to put on a board -- in open airflow the PCB can handle the full 20A for a few minutes at a time, but in an enclosed area heat can build up.
Note: Please keep in mind that this board is really meant for someone with experience and good knowledge of electricity. If you're uncomfortable soldering or dealing with high voltage, please check out the IoT Power Relay. The IoT Power Relay is fully enclosed, making it a lot safer.
This skill defines how difficult the soldering is on a particular product. It might be a couple simple solder joints, or require special reflow tools.
Skill Level: Rookie - The number of pins increases, and you will have to determine polarity of components and some of the components might be a bit trickier or close together. You might need solder wick or flux.
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Whether it's for assembling a kit, hacking an enclosure, or creating your own parts; the DIY skill is all about knowing how to use tools and the techniques associated with them.
Skill Level: Noob - Basic assembly is required. You may need to provide your own basic tools like a screwdriver, hammer or scissors. Power tools or custom parts are not required. Instructions will be included and easy to follow. Sewing may be required, but only with included patterns.
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If it requires power, you need to know how much, what all the pins do, and how to hook it up. You may need to reference datasheets, schematics, and know the ins and outs of electronics.
Skill Level: Competent - You will be required to reference a datasheet or schematic to know how to use a component. Your knowledge of a datasheet will only require basic features like power requirements, pinouts, or communications type. Also, you may need a power supply that?s greater than 12V or more than 1A worth of current.
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Based on 22 ratings:
3 of 3 found this helpful:
Seconding Member #380262's note: To control this with 3.3v, R2 needs to be switched to 660 ohm or so.
I built two of these, one works pretty reliably on 3.3v, but the other one doesn't fully close, rather than a crisp click it made a soft blip sound. Switching the resistor fixed it (I used a 680 ohm).
Also I had 110V AC going through that, and before I fixed it I was getting ~60V NO and ~20V on NC. Seems it was somehow half closed, and possibly arcing inside the relay?, which could be a dangerous failure mode.
7 of 7 found this helpful:
Works great and is as advertised. However I would add if you are using a RPi to control this (3.3v) then change the gate resistor to 660 ohms so that the current stays above 5mA and will properly trigger the transistor.
1 of 1 found this helpful:
I purchased 3 beefcake relay kits for a water control project. Two of them were exactly as advertised, but the third was missing one 1k resistor and had an extra transistor. I used a 1k from my junk box and completed the kit. They will be operating in a humid environment so durability remains to be established. I used two soldering irons - a small one for the low voltage side and a big one for the relay pins.
1 of 1 found this helpful:
I have several projects where I need to be able to turn larger pieces of equipment on and off and I've been making my own relay controllers but these little kits put everything together in one nice package and the price it good. I haven't had mine in service for long so I'll re-post if I have any problems in the future, but so far so good. The LED is a nice addition. My only concern is that people could shock the crap out of themselves if this isn't properly enclosed in a box. But then again, that's what makes it fun right?
i just now finished soldering the kit together. purpose: to switch a DC motor which is actually a fountain pump, using the Arduino. the fountain pump is for a hydroponics grow-tower, so, using the "blink" sketch with the delay set to 1-million (about 16-ish minutes) that gives the plants 16 minutes on, 16 minutes off, of hydroponic solution. it's sitting beside me as i type this and is working perfectly! thanks guys!
Easy to solder together and assemble. Have three running off an Arduino Uno to cycle power to different sensors for testing. Works great.
Easy to assemble and fairly cheap. I have 10 of them in use in my swimming pool control system.
Using four of them with an Arduino to do some testing, over 200,000 cycles (in less than two weeks) on each one with no problem! Cheap, easy to use, and reliable - what else could you ask for?
Only feedback would be that if they are ever revisioned, it would be nice if they added ability to use a 0.1" header for the inputs...
I love this product and have used many of them. I especially like the new version with both NO and NC terminals. I don't have to modify the board for some of the applications.
I am building a 14 zone irrigation system for my yard/garden beds/potted plants and this relay is the key to the project. Works great!
They look like they are built to handle the rated load. Good heavy traces. Others I have seen online can't hold up. Good design folks.
Certainly more compact than 4 "power switch tails"
pretty easy to put together, but after i put it in my system i noticed that on the normally open terminal that it's "leaking" 3 volts for some reason on an input of 120 volts. not sure why, because if it's open then it should read 0 volts, right? ;-)
maybe i goofed up somehow, but it's puzzling. anyway, i'd still recommend it because there isn't anything that i know of that an integrated relay that can handle this much load.
Hello, and thanks for the review!
Relays shouldn't leak at all. You might try cleaning any flux residue off the bottom of your board around the relay and output connector. A bit of flux there could definitely cause a small current leak.
I've had several of these work without issue when driven by a 3.3 Vdc control. However, others have proven to not operate fully. I've had to replace the 1K resistor with a 470 ohm resistor to get a solid relay energize. I'd suggest Sparkfun include a 470 ohm resistor for the control (to the transistor base) for those instances where 3.3 Vdc will be used for control with a corresponding mention in the documentation.
Assembly and soldering was a snap, and it works just like it's supposed to. This thing can handle an impressive amount of current, though I'm currently using it at only a fraction of it's rated capacity to turn off a bunch of lights in my bedroom. Would def recommend!
Basic electromechanical relay board, quick to solder together and works as you would expect. I'm using it to switch a 115VAC outlet that has a load of about 7 amps connected. Power is normally "on", so power is wired through the normally closed contacts. Power is only disconnected for a few seconds at a time to cycle power on the load once every few days so I expect it to last for quite a while.
Handles the 2kW water heater element. Other relays... didn't!
I've used these in my brewery controller for years. They happily switch and carry 240V/10A on the high voltage side.
However I had one relay that MOSTLY worked but had a weird failure mode that it would regularly drop into halfway through a brew day. It was driving me nuts and I thought I'd finally fixed it many times, only to have the issues resurface shortly after.
So I finally gave up on it and bought a replacement, and when I swapped it out, I noticed that I had got the signal and Zener diodes mixed up on the dodgy board when I assembled it. It was a relief to finally understand what had been going on, but yeah, don't do that.
The Beefcake Relay Control Kit (Ver. 2.0) Is an amazing kit. It is easy to assemble and works wonderfully. It works great with the Arduino and the Raspberry Pi.
Easy to assembly and cost effective