Connector Type | / |
---|---|
Contact Material | / |
Contact Type | / |
Current Rating | 10 Amps |
Mounting Type | / |
Brand | SainSmart |
Operation Mode | Automatic |
Coil Voltage | 5 Volts |
Contact Current Rating | 10 Amps |
Maximum Switching Current | 10 Amps |
Specification Met | / |
Item model number | 101-70-100 |
Item Weight | 1.06 ounces |
Product Dimensions | 4.79 x 0.69 x 0.1 inches |
Item Dimensions LxWxH | 4.79 x 0.69 x 0.1 inches |
Manufacturer | SainStore Inc. |
ASIN | B0057OC6D8 |
Is Discontinued By Manufacturer | No |
Date First Available | June 23, 2011 |
SainSmart 2-Channel Relay Module
Connector Type | / |
Contact Material | / |
Contact Type | / |
Current Rating | 10 Amps |
Mounting Type | / |
About this item
- 5V 2-Channel Relay interface board, and each one needs 15-20mA Driver Current
- Equipped with high-current relay, AC250V 10A ; DC30V 10A
- Standard interface that can be controlled directly by microcontroller (Arduino , 8051, AVR, PIC, DSP, ARM, ARM, MSP430, TTL logic)
- Indication LED's for Relay output status
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What's in the box
Product Description
SainSmart 2-Channel Relay Module
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Price | Currently unavailable. | $18.99$18.99 | $29.95$29.95 | $9.99$9.99 | $17.40$17.40 | $7.99$7.99 |
Delivery | — | Get it as soon as Monday, Mar 25 | Get it as soon as Monday, Mar 25 | Get it as soon as Monday, Mar 25 | Get it as soon as Monday, Mar 25 | Get it as soon as Monday, Mar 25 |
Customer Ratings | ||||||
Value for money | 4.2 | — | 4.6 | 4.3 | — | 4.5 |
Easy to use | 4.2 | — | 4.8 | 4.1 | — | 4.4 |
Quality of material | 4.8 | — | 4.7 | 4.3 | — | — |
Sold By | — | CenryKay | Digital Loggers Direct | Teyleten Robot-US | Electronics-Salon. | SunFounderDirect |
contact type | / | Normally Closed | Normally Closed, Normally Open | — | — | — |
max switch current | 10 amps | 10 amps | — | 10 amps | 10 amps | 10 amps |
— | 12 volts | — | 250 volts | 30 volts | — | |
— | — | — | — | — | — | |
— | — | — | — | — | — | |
coil voltage | 5 volts | 12 volts | — | 3.3 volts | 24 volts | 5 volts |
operation mode | Automatic | Automatic | Automatic | Automatic | Motor | Automatic |
Product information
Technical Details
Additional Information
Customer Reviews |
4.6 out of 5 stars |
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Best Sellers Rank | #211,824 in Industrial & Scientific (See Top 100 in Industrial & Scientific) #678 in Electrical Relays |
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From the manufacturer
SainSmart 2-Channel 5V Relay Module
This is a 5V 2-Channel Relay interface board, Be able to control various appliances, and other equipments with large current.
It can be controlled directly by Micro-controller (Raspberry Pi, Arduino, 8051, AVR, PIC, DSP, ARM, ARM, MSP430, TTL logic) .
Features:
- 5V 2-Channel Relay interface board, and each one needs 15-20mA Driver Current.
- Equiped with high-current relay, AC250V 10A ; DC30V 10A.
- Indication LED’s for Relay output status.
- It activates on low level.
Package Content:
- 1 x SainSmart 2-Channel 5V Relay Module
From the brand
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How did we get our start?
SainSmart has served the maker community for years. As time went on and the maker movement continued to grow so did our product selection, we continue to provide quality products with great value and performance to our customers.
What makes our products unique?
With our superior quality control and a variety of open hardware supplies, we believe we can provide you with a better shopping experience and guide you through your Maker Journey.
Why do we love what we do?
Ten years of DIY/Maker-centric products has been a great journey! We are glad to play a part in this voyage, bringing value and performance to our customers and “unleash creativity” helping turn their daydreams and weekend projects into reality.
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Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers like the performance, quality and ease of use of the relay. For example, they mention it works well, is well built and easy to program. Some appreciate the value for money. That said, they say it's perfect for use in an Arduino project and good for DIY projects.
AI-generated from the text of customer reviews
Customers are satisfied with the performance of the relay. They mention that it works well, has a rustic finish, and performs consistently. The input side of the board is working great and never gave them any trouble. It works as designed and has no problems. Some say that it's a fine device, well built, and reliable. Overall, most are happy with their purchase and recommend it to others.
"...and setup may not be simple for a beginner, but once understood, it works well and is easy to control via the Arduino...." Read more
"...In extended use the relay performed really well. It is durable lightweight and easy to wire.Pros:120V 10A switch rating...." Read more
"Works perfectly for my small time-based projects (latest project, time-based doorbell)**NOTE (does not need a star removed for it)**..." Read more
"Functions fine so far, but there is no way to use the two mounting holes on the screw terminal side with M3 nuts/bolts...." Read more
Customers are satisfied with the quality of the relay. They mention that it is well-made, reliable, and easy to use. Some say that the board is okay, but it just isn't the right topology for switching. Overall, customers are happy with their purchase and recommend it to others.
"The 2 pack relay is ideal for Arduino - the logic is backwards it seems but probably good from the stand point should a logic line fail, the relay..." Read more
"...In extended use the relay performed really well. It is durable lightweight and easy to wire.Pros:120V 10A switch rating...." Read more
"but it is a nice, cheap relay. You can use it to control low voltage or line voltage (i.e. switch a power outlet on and off) from an Arduino...." Read more
"...Pros:Good Quality Board and Small and Compact form factorRelays are rated 5VDC and 10A @ 125 Volts..." Read more
Customers find the relay easy to work with, setup, and use right out of the box. They say the instructions are easy to find and use with an arduino. Customers also mention that the relay is simple to solder and small enough to fix in a project box. Overall, customers are satisfied with the ease of use and recommend it to others.
"...for a beginner, but once understood, it works well and is easy to control via the Arduino...." Read more
"I have used 3 of these now, driven by an Arduino Uno. It's a pretty simple module to use...." Read more
"This compact relay board is easy to interface to 3.3v microcontrollers, like those on wireless routers and Netduinos, with a little setup...." Read more
"The relay module works and it is installed in a home automation project...." Read more
Customers appreciate the value of the relay. They say it's a good inexpensive module that works excellent at a great price.
"but it is a nice, cheap relay. You can use it to control low voltage or line voltage (i.e. switch a power outlet on and off) from an Arduino...." Read more
"...Good Circuit. Good Price.For Arduino it works something like a REVERSE...." Read more
"...Great quality and usefulness for the money!" Read more
"...Overall, this relay board is a great low-cost solution for enabling Internet control of just about anything." Read more
Customers find the relay module super handy, perfect for use in an Arduino project, and good for DIY projects. They also say it's a great little device and helps with controlling low voltage.
"High quality, functions great and it's easy to work with. Perfect for Arduino projects among other things; and as previously mentioned it does..." Read more
"Great little device, used it with my Raspberry Pi to control some low voltage signals to various devices...." Read more
"Great product and great help with it. Sainsmart does have tutorials out there via wiki, instructables, and thinks like that." Read more
"SainSmart makes a pretty smart relay module......" Read more
Customers are satisfied with the size of the relay. They mention that it is compact, light weight, and easy to solder. Some say that it fits well for their projects, and the terminal block is still large enough to hold a standard lamp cord.
"...Pros:Good Quality Board and Small and Compact form factorRelays are rated 5VDC and 10A @ 125 Volts..." Read more
"...The terminal block is still large enough to hold a standard lamp cord.There is a clicking noise when they come on and off...." Read more
"...a bit pricier than I needed to spend, but has two relays and fit well for my project. I'd have gone 5 stars if it was a little less expensive...." Read more
"...Easy to setup and install, compact to fit. Worked out great!" Read more
Customers like the status LEDs that come on when the relays are active. They say the indicator lights are awesome and easy to use.
"...The indicator lights are awesome my biggest complaint is the strangeness of the relay...." Read more
"...the sound of the relays, they are quite audible, indication lamps as to relay state is nice." Read more
"...I like the status LEDs that come on when the relays are active...." Read more
"Easy to use. LEDs show when relay on. Here is a sketch I used to test:..." Read more
Customers are dissatisfied with the audio quality of the relay. They mention that it makes a very audible click when it switches state.
"...When switching the relay does make a good bit of noise...." Read more
"...this relay is mechanical and makes a very audible CLACK when it switches state. Keep that in mind depending on your application!-..." Read more
"...There is a clicking noise when they come on and off. It's not overly loud, but it is audible...." Read more
"...It is very audible when switched but that's ok. It is not something you can use as a dimmer though." Read more
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Top reviews
Top reviews from the United States
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In extended use the relay performed really well. It is durable lightweight and easy to wire.
Pros:
120V 10A switch rating. Great for home lighting and automation systems.
Indicator lights for the relays.
Cons:
Unsoldering the male header pins was a pain and I wish this relay came with female headers or none at all.
When switching the relay does make a good bit of noise.
Little to no documentation from SainSmart (After a quick email I got the schematic)
Overall I would recommend this for anyone interested in switching 120V 10A sources with Arduino like devices.
**NOTE (does not need a star removed for it)**
This is an electromagnetic relay, meaning that you have to send it HIGH voltage (5v) for OFF, LOW voltage for ON.
Make sure to run your ground as well.
No directions came with it, which i'm writing this review for the next person that buys it.
A nice *CLICK* to hear the relay working as well as a LED light for each relay.
The connections to your Arduino (or whatever) are:
VCC - supply voltage. 5V from my Arduino.
IN1 - set to HIGH to set the relay to its "default" state, set to LOW to switch the relay to its alternate state
IN2 - same as IN1, but controls the second relay on the board
GND - ground
A few random notes:
- I really appreciate the indicator lights on this board! (power, relay1 on/off, relay2 on/off)
- this relay is mechanical and makes a very audible CLACK when it switches state. Keep that in mind depending on your application!
- I unsoldered the connection pins and replaced them with wires - if you don't want to do that you'll need some sort of coupler. I'm new to hobby electronics so I'm probably missing some terminology .. essentially the connections to control this relay are in the form of pins (male) on this board, while it has screw-in terminals for the high voltage input/outputs. I unsoldered the pins from this board and replaced with wires, and it works fine.
This was a pain, so had I known I needed to do this before this arrived, I would have looked for a female/female coupler (again, sorry if I'm missing the right terminology)
Good Circuit. Good Price.
For Arduino it works something like a REVERSE. As soon as I set my Arduino Pins as OUTPUT in Arduino Program, Both RELAYs turns ON without actually making these pins HIGH. I can TURN OFF RELAYS by Setting
digitalWrite(Relay1, LOW) // which infact is making RELAY turn ON
digitalWrite(Relay1, HIGH) // which is infact turning OFF the RELAY
So, this is reverse when compared to Normal operation of the RELAY Circuit. I have made my own circuit on a Breadboard with a Small 1A Test RELAY and it works perfectly fine.
I am testing more with this RELAY Circuit and will update more as I find out the other details.
Pros:
Good Quality Board and Small and Compact form factor
Relays are rated 5VDC and 10A @ 125 Volts
Has Relay 1 & 2 Indicators, Power Indicators which are great help
Good Separation between Mains Voltage contacts
Cons:
No Connecting wire supplied for the 4 Pin. I had to remove pins to Solder wires to it.
My Board turns is ON all the time. I have to set the output pin to HIGH to turn it to LOW (Tested 2 other Relay Circuits One from SparkFun and Adafruit and None of them have this problem)
I will test by adding a 10K Resistor to ground to see if this fixes the issue.
Top reviews from other countries
I guess there is 4 channel model as well but I wanted a dual channel and it solved my purpose. Very haply with the purchase. The price was also very reasonable compared to the quality and it solved my purpose.
will post some pictures once I finish the install.
2チャンネルのものを、Arduino UNO R3 互換ボード(SainSmartオリジナルバージョン)と組み合わせて使用して、問題ナシでした。
リレーモジュールは、接点が1組のリレーが2個実装されたもので、デジタル出力「LOW」の時に点灯するLED(赤)が2個実装されており、トランスファー接点なので、1つのデジタル出力で接点=閉/開どちらからでも配線できます。
Arduinoの起動時のデジタル出力が「LOW」のなので、Arduinoと接続されたリレーは、起動時に一斉に動作して、以降、イベント発生時にデジタル出力が「HIGH」となる間以外は、リレーが常に動作しているので、動作リレー分の電流を消費していることになります。
以下、少しでも消費電流を抑える使い方として、
必要なリレーのみ、Arduinoの起動時のデジタル出力「HIGH」とすることで、イベント発生時のデジタル出力が「LOW」の間のみの動作になり、消費電流が低減します。
ピン毎の設定なので、以前の起動時のデジタル出力「LOW」(初期設定ナシ)との混在もできます。
【起動時のデジタル出力「HIGH」の設定(Arduinoのスケッチ)】
2チャンネルのリレーモジュールで、何度か確認しましたが、LED(赤)の点灯とリレーの動作は確認されませんでした。
たぶん、void setup()内の記述と記述順で、抑え込まれていると推測しています。
以下は、イベント発生時にデジタル出力「HIGH」(digitalWrite()「HIGH」の記述)が、既にスケッチされているものとして記載しています。
動作の確認は、設定したピンに該当するLED(赤)の点灯/消灯・リレーの動作音・接点の開/閉が、変更前/後で反対の動作をしていること。
および、全体の動作に異常がないこと。
(1).リレーに接続したピンのdigitalWrite()の記述変更(イベント発生時の記述)
digitalWrite()の記述「HIGH」→「LOW」へ変更します。
(2).void setup()内への記述追加(該当ピンの初期設定)
void setup()内の先頭行付近で、必ずpinMode()の行より以前に、(1)の初期設定としてdigitalWrite()「HIGN」の記述を追加します。
(pinMode()は、void setup()内に記述されているものとします。)
pinMode()は「OUTPUT」=出力の指定なので、この行より以前に記述することで、pinMode()が実行された時点では、既にdigitalWrite()は「HIGN」のため、「LOW」は出力されないと思われます。
(3).コメントの追記
void setup()内へ記述したdigitalWrite()の行に、「// 起動時「HIGH」出力。必ずpinMode()「OUTPUT」以前に記述。」など。
起動時が通常の「LOW」ではなく、また混在もできるので、後々でもわかりやすいコメントがよいと思います。
(4).起動時のデジタル出力「HIGN」→「LOW」への戻し
(1).の記述:「LOW」→「HIGN」へ変更します。
(2).の記述:「//」を行の左端に記述してコメントアウトします。
(3).の記述:コメントアウトなので変更不要です。
4、8、16チャンネルでは動作未確認です。
リレー接点の開/閉動作が入れ替わるので、配線の変更が必要になります。
尚、上記の前に、該当ピンの初期設定として、void loop()内の先頭行にdigitalWrite()「HIGH」を記述して、2チャンネルで確認したところ、Arduinoの起動時に、リレー動作には至りませんが、LED(赤)が瞬時に点灯することが確認できたので(必ず再現)、一瞬「LOW」が出力されていると推測しています。
また、リレーの増加に伴って、digitalWrite()「HIGH」の記述も増えるため、後方の記述ほど、リレー動作に至る可能性が高くなります。
リレー動作に至った接点の接続先では、誤表示や誤制御などが考えられるので、こちらのスケッチはお奨めしません。
《2015年11月25日:修正》ーーーーーーーーーー
内容に誤りや不備・不足があったため、全面的に見直しを行って、タイトルと内容を修正しました。
失礼しました。
Attached relay to Raspberry PI as follows:
- Removed blue jumper
- RP pin 1 (3.3V) to Relay Vcc
- RP pin 2 (5V) to Relay JD-Vcc
- RP pin 11 (GPIO-17) to Relay IN1
- RP pin 6 (GND) to Relay GND
The value of R1 and R4 is 1000ohm, which gives current of approximately = 3mA [(5V-1.3V-0.7V) / 1000ohm] for operating the opto-coupler when driven at 5V.
To operate the Relay from 3.3V, I lowered the values of R1 and R4 (by soldering a 470 ohm resistor in parallel with the 1000ohm) and it works. This gives the opto-coupler about 4mA when driven from 3.3V. (3.3-1.3-0.7) / (470*1000/(470+1000)). Optionally, instead of soldering 470 ohms in parallel, I could have replaced R1 and R4 with 330 ohm resistors.
I connect the Raspberry PI to the modified relay card as described above, and it works good.
My only complaint is the apparent lack of any documentation around this product. The best I could find were some barely legible diagrams and a few blogger posts.
This relay module is also "active-low", meaning that the circuit is closed when there is low or no signal and open when there is a high signal. This is the opposite of what most would expect. Again, documentation to this fact would have been helpful.