Automation

• Operating voltage: 3.3V~5V.
  
• Adjustable sensitivity (blue digital potentiometer adjustment)
  
• Dual output mode, analog output more accurate.
  
• A fixed bolt hole for easy installation.
  
• Power indicator (red) and digital switching output indicator (green).
  
• LM393 comparator chip, stable.
  
• PCB Dimension: 3cm x 1.5cm.
  
• Soil Probe Dimension: 6cm x 2cm.
  
• Cable Length: 21cm.
  

The RPi Relay Board gives your Pi the ability to control high voltage/high current devices, easily makes normal home appliances become intelligent.

• Supports Raspberry Pi A /B /2B/3B
• High quality relays, loads up to 250VAC/5A, 30VDC/5A
• Photo coupling isolation, prevent interference from high voltage circuit
• Onboard LEDs for indicating relays status
• Relay control jumper, allows to control the relays by custom pins other than the default pins
• Comes with development resources, including examples in wiringPi, WebioPi, shell, python, and bcm2835

What's on the RPi Relay Board

1. Raspberry Pi GPIO interface: for connecting Raspberry Pi
2. Relay screw terminal: for connecting target devices
3. Relays
4. Photocoupler: PC817
5. Relay indicator
• LED on: relay NC is opened, NO is closed
• LED off: relay NC is closed, NO is opened
6. Power indicator
7. Relay control jumper
• short the jumper: control the relays by default I/Os used in the example code
• open the jumper: control the relays by custom I/Os through jumper wires

What's in the box?

Wiki : www.waveshare.com/wiki/RPi_Relay_Board

• Magpi example
• Rain Sensor Module (SN-RAIN-MOD)
• Video

Take control of and monitor your world with our ultimate jack-of-all-trades Raspberry Pi HAT!

We've pulled together a great set of features into this home monitoring and automation controller. With relays, analog channels, powered outputs, and buffered inputs (all 24V tolerant) you can now hook up a plethora of goodies to your Raspberry Pi all at once.

Better still each channel has an indicator LEDs which means at a glance you can see what's happening with your setup. Even the analog channels have dimming LEDs that allow you to see the value they are currently sensing - swish!

Ideal for smart home and automation projects, giving your greenhouse intelligent sprinklers, or scheduling your fish feeding!

Features

• 3 x 24V @ 2A relays (NC and NO terminals)
• 3 x 12-bit ADC @ 0-24V
• 3 x 24V tolerant buffered inputs
• 3 x 24V tolerant sinking outputs
• 15 x channel indicator LEDs
• 1 x 12-bit ADC @ 0-3.3V
• 3.5mm screw terminals
• Power, Comms, and Warn! LED indicators
• SPI, TX (#14), RX (#15), #25 pins broken out
• Compatible with Raspberry Pi 3, 2, B , A , Zero, and Zero W
• Python library
• Comes fully assembled (broken out pins require soldering)

Software

As ever, we've made a super-simple to use Python library to take advantage of Automation HAT's multitudinous functions, with examples to get you started.

Our input, output and relay examples show you how to read the analog and digital inputs, switch the outputs on and off, and control the relays.

Notes

• We recommend you use a set of brass M2.5 standoffs with Automation HAT to avoid pins contacting the HDMI port if the HAT is pushed down
• Loads for the buffered outputs should be switched on the ground side, i.e. 12/24V (from supply) -> load -> output terminal -> ground (from supply)
• The relays can tolerate up to 2A each and should be switched on the high side

The MonkMakes Relay for micro:bit is a solid-state (no moving parts) relay that allows an output of a micro:bit to turn things on and off.

A micro:bit can turn an LED on and off directly, but anything more powerful requires something like a relay or a transistor. Using a transistor to switch something on and off requires a shared ground connection with the micro:bit and a knowledge electronics that you or your students may not be ready for. The MonkMakes Relay for micro:bit is much easier to use, acting like a simple micro:bit controlled switch.

This relay can be used to switch low voltage devices such as light bulbs, a motor, a small heating element or even a string of 12V LED lighting. The voltage needs to be kept under 16V, but the relay will automatically protect itself against too much current.

FEATURES

• Solid-sate relay (up to 2 Amps)
• Active LED indicator
• Resettable ‘polyfuse’ to protect against over-current

Getting Started with your micro:bit

Connecting your micro:bit

The Relay requires just two connections to the micro:bit. One to GND (ground) and one to whatever pin is to be used to control the relay’s switching action.

When attaching the alligator clips to the micro:bit, make sure that the clips are perpendicular to the board so that they are not touching any of the neighbouring connectors on the micro:Bit edge connector.

Here’s an example of how you could wire up a MonkMakes Relay for micro:bit to turn an old fashioned light bulb on and off.

HEX File

The quickest way to try out your relay is to DOWNLOAD THIS HEX FILE >and then copy it onto your micro:bit. The program will turn the relay on and off once a second.

JavaScript Blocks Editor

Set the controlling pin to 1 and the relay contacts will close, set it to 0 and the contacts will open again. Its as simple as that. So, to make your relay turn on and off once a second, open the Blocks Editor, add a forever block and then the digital write blocks from the pins category and the pauses from the basic category.

MicroPython

Paste the following code into the Python window and then Download the file and copy it onto your your micro:bit.

from microbit import *

while True:
    pin0.write_digital(True)
    sleep(500)
    pin0.write_digital(False)
    sleep(500)

Analog Outputs

The latest MonkMakes Relay for micro:bit can do more than just switch things on and off. It can also be used with micro:bit analog outputs. Look closely at your Relay for micro:bit and is it has the version number v1ev (under the word ‘Board’) then it can be used with the ‘analog write’ block in the blocks editor or the ‘write_analog’ function in MicroPython. If your board has the version number v1e then it is not suitable for use with analog outputs – sorry you were unlucky to get one of the small batch of first boards to be sold.

The output of the Relay for micro:bit is not linear at low PWM and high PWM values as the following chart illustrates.

The y-axis shows the current in mA for a test load resistor supplied from a constant voltage source. The x-axis is the analog write value (0 to 1023). As you can see, there is a dead zone up to a analog output value of about 100, followed by a relatively good linear region right up to about 1000, after which the output effectively becomes ‘on’.

The tests were carried out at the default PWM frequency of 50Hz for the micro:bit. Lower frequency PWM is expected to produce more linear results.

Sonoff Dual is a WiFi based 2 gang switch that can connect and independently control two connected appliances or lights. This simply means 1 Sonoff Dual control switch equals to 2 Sonoff basic switches! Sonoff Dual 2 gang light switch inherits Sonoff Basic switch’s advantages such as easy installation and operation, quick WiFi access, remote control through APP EweLink.

In the application eWeLink, available on both iOS and Android, users can independently turn on/off each of the two connected devices. But the button on Sonoff Dual 2 gang WiFi light switch is not an ON/OFF toggle switch, it is only a WiFi pairing button. Users can set single/repeat/countdown timing schedules to turn on/off at a specified time, and also share with others so that they can control together.

Works With Amazon Alexa

You can ask Alexa to turn on/off Sonoff Dual.

Standard voice control commands phrases for Sonoff Dual (if you just say the device name, Alexa will turn on/off all the 2 gangs immediately):

Alexa, turn on {deviceName}
Alexa, turn off {deviceName}

Alexa, turn on {deviceName} {gangName}
Alexa, turn off {deviceName} {gangName}

Explanation: if the device name of your Sonoff Dual is "My Switch", the gang name is "Gang 1", then you can control with "Alexa, turn on My Switch Gang 1".

For detailed tutorial, please click here.

Check out the amazing features of this product below:

Features

• Remote turn on/off through the APP EWeLink
• Independently control 2 devices in APP EWeLink
• Supports tracking device status on EWeLink
• Supports setting countdown, single and repeat timing tasks
• Works with Amazon Echo, Echo Dot, Amazon Tap
• Works with Google Home, Google Nest
• Works with IFTTT

Specifications

• Power Supply: 90-250V AC
• Max Current: 16A(2 gang),10A(1 gang)
• Max Power:  3500W(2 gang) / 2200W(1 gang)
• Product Dimensions: 114*52*32mm
• Color: White
•  Frequency: 802.11 b/g/n 
• Security Mechanism: WPA-PSK/WPA2-PSK
• Humidity: 5%-90%RH, Non-condensing
• Enclosure Material: Fire-retardant ABS V0
• Operating Temperature: 0ºC-40ºC(32°F-104°F)
• Gang: 2
• Certification: CE, RoHS, FCC

Package

1 x Sonoff Dual

Product: light control sensor

Power source: 220V

Rated Current: 10A 

Ambient temperature: max 55 (C)

• 10A 250VAC
• 10A 125VAC
• 10A 30VDC
• 10A 28VDC

To check compatibility of a new remote with the receiver. Simply press the button on the remote, if the receiver flashes, but does not Triger the relay. The remote will be compatible, and you can start the programing process

To add a remote, press the button on receiver momentarily. The red light will come on. Then press the button on the remote that you want to program in. The red light will start flashing. After 4 flashes in will stop, and the button will be programmed in.

For the setting to take effect, the board needs to be disconnected from it’s power supply. The bellow settings will be done to the 3 headers and bridge pin on the receiver board, above the push button.

• With the header removed, the On button will switch the relay on, and the off button will in turn switch the relay off.
• With the header on Pin 1-2. Both Buttons will become momentary. And only hold the relay in place as long as they are pressed in.
• With the header on Pin 2-3. Each button will be able to switch the relay on and off individually. You will however not be able to switch the button off with the “off” button, if you switched it on with the “on” button. And vise versa.

What's in the box?

1 x Learning Code Receiver Relay
1 x Remote Control

As you know, most of the Sonoff products are not DIN rail mounted, which makes it difficult to put the Sonoff products into the switchboard. We have now launched another inexpensive and practical accessory - Sonoff DR - DIN Rail Tray.

Sonoff DR can work with most of our Sonoff products, including Sonoff Basic, Sonoff RF, Sonoff Pow, Sonoff TH10/16, Sonoff Dual, Sonoff G1.

The installation is very simple. The Sonoff DR has a blue part, which allows you to push fit the switch to DIN rail or pull to remove it. No external tools are required.

The material is fire-retardant ABS and the fire rating is V0. The Sonoff DR comes with 4 x M3 screws, which perfectly fit Sonoff's original holes.

Package includes:

1 x Sonoff DIN Rail Tray
4 x M3 screws

The RPi Relay Board (B) is an expansion board with 8-ch relays for Raspberry Pi. It gives your Pi the ability to control high voltage products such as home appliances.

• Supports Raspberry Pi A /B /2B/3B/3B /4B
• High quality relays, loads up to 5A 250V AC or 5A 30V DC
• Photo coupling isolation, prevent interference from high voltage circuit
• Standard rail mount bottom case
• Onboard LEDs for indicating relays status
• Relay control pin selection jumper, allows to control the relays by custom pins other than the default pins
• Reserved control Interface, allows to work with controllers like PLC
• Comes with development resources, including examples in wiringPi, bcm2835, python, python-bottle (webpage control), and crontab (cron job)

• Power supply voltage: 5V
• Trigger signal: 3.3V/5V
• Relay channels: 8-ch
• Contact form: SPDT-NO,NC
• Closed current: 6mA (per channel)
• Connector: screw terminal block
• Dimension: 232 × 72 (mm)
• Mounting hole size: 3.0mm

Dimensions

Wiki : www.waveshare.com/wiki/RPi_Relay_Board_(B)

Online Documentation

• 3x AC Current Ports.
• 1x Temperature Ports.
• Provides Irms, EstimatedPower, Temperature.
• View/record data using Linux / Python / Emoncms / Grafana / MQTT and more.
• Configurable from serial port.
• Open Source Arduino Firmware.

• 1 RPICT3T1 Unit.
• 2 Mounting Stand off with screws.

• DS18B20

• SCT-013-000 (0A to 30A)

This development board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by LeChacal.com to be a finished end-product fit for general consumer use. Persons handling the product(s) must have electronics training and observe good engineering practice standards. As such, the goods being provided are not intended to be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including product safety and environmental measures typically found in end products that incorporate such semiconductor components or circuit boards. This
evaluation board/kit does not fall within the scope of the European Union directives regarding electromagnetic compatibility, restricted substances (RoHS), recycling (WEEE), FCC, CE or UL, and therefore may not meet the technical requirements of these directives or other related directives.

• 7x AC Current Ports.
• 1x AC Voltage Ports.(ZMPT101B voltage sensor included)
• Provides Irms, Vrms, RealP, ApparentP, ReactiveP, PFactor, Frequency, EstimatedP.
• View/record data using Linux / Python / Emoncms / Grafana / MQTT and more.
• Configurable from serial port.
• Open Source Arduino Firmware.
• Stackable with RPICT8 Slave.

• SCT-013-000 (100A)

This development board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by LeChacal.com to be a finished end-product fit for general consumer use. Persons handling the product(s) must have electronics training and observe good engineering practice standards. As such, the goods being provided are not intended to be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including product safety and environmental measures typically found in end products that incorporate such semiconductor components or circuit boards. This
evaluation board/kit does not fall within the scope of the European Union directives regarding electromagnetic compatibility, restricted substances (RoHS), recycling (WEEE), FCC, CE or UL, and therefore may not meet the technical requirements of these directives or other related directives.