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Although the reader does not read the information on the NFC card, it is triggered by a 125 khz NFC card
Ever wanted to use two different operating systems with the same Pi at the flick of a switch? Well now you can!
This 2 in 1 micro SD card switcher is specially designed for the Raspberry Pi, and you can now enjoy the convenience of using two micro SD cards at the same time on the same Pi!
To transfer between your operating systems, insert two micro SD cards into the adaptor (one on top, and one at the bottom, Then ensuring the Pi is switched off and power removed, switch the switch on the adaptor! Next time you boot, it will boot the secondary micro SD card!
2 in 1 Dual Micro SD Switcher for Raspberry Pi Features:
- Designed for Raspberry Pi B /2/3/Zero
- Dual micro SD card slot with switch
- Enables the use of two operating systems on the same Pi without needing to remove/swap the micro SD cards.
- Dimension: 36mm(length) x 24mm(width)
During testing we noticed that both micro SD cards have to be inserted for the unit to operate.
Description:
Great for small 12 volt DC solar panel LED Lighting systems to conserve battery power; also well suited for occupancy LED lighting control and security LED Lighting systems
Specifications:
- Influence control: Light Infrared PIR
- Two light modes: all day/at night(Auto switching on when detecting people coming.)
- Super energy saving, super sensitivity within 7 meter distance.
- Built in light sensor which can identity day and night by itself,
- Sensor sensitivity distance: ≥7m
- Sensor sensitivity angle: 145°
- Load current:10A
- Working voltage:DC 5V-30V
- Delay time: If people leave, light will delay 30s-150s(Adjustable) to turn off
- Certificate: CE
- Suitable for use in homes, wardrobes, kitchens, stairs, camping tents...
- Size:50mm x 43mm x 20mm(approx)
- 5.5 x 2.1mm male to male cable length:1M(approx)
- 5.5 x 2.1mm male to female cable length:1M(aprpox)
- Color:Black
- 1 x PIR sensor
- 1 x 5.5 x 2.1mm male to male cable
- 1 x 5.5 x 2.1mm male to female cable
Operating temperature: -40°C to 70°C
Rated voltage: AC 125V-250V
Per weight: 2g
Current rating: 5A
Size: 20 x 10 x 6mm (L X W X H)
PCB Terminals Circuit Board
With Roller Lever Limit
Working principle:
By external mechanical force transmission elements (by pins, buttons, levers, rollers, etc.) will be used to force action on a reed, producing reed instantaneous action when action shifted to the critical point, so moving contact with the fixed contact spring at the end of the action point fast on or off.
When the force is removed on the drive components, action reed produce reverse action force transmission element reverse stroke when the action reaches a critical point reed, instantaneous reverse action.
Feature: contact spacing is small,short stroke action,according to the power of small,fast-break
Application:
Apply in A computer mouse, car mouse, automobile electronic products, communications equipment, military products, test instrument, gas water heater, gas burner, small home appliance, microwave oven, electric rice cooker, floating ball supporting equipment, medical equipment, building automation, electric tools, ect.
Package included:
10 x Micro roller switch
A tactile switch, also known as haptic switches, is a momentary switch designed to provide tactile feedback or response when pressed to activate it. There is an overlay on top of the switch that sits above a metal dome inside the switch.
Great for learning feedback events when you are just getting started, and looks good enough to implement in all projects.
Specifications:
- 12 x 12 x 7.3mm push buttons with caps
- 5 colours
- Red, black, white, blue and yellow
Package includes:
25 x Tactile Push Button Switch
25 x Caps(Red black white blue yellow) Each color 5pcs
Resources:
Read the Docs
We designed this board to give the user a very discrete button without any edges. Button closes when you push it and opens when you release (momentary push button).
Each LilyPad was creatively designed to have large connecting pads to allow them to be sewn into clothing. Various input, output, power, and sensor boards are available. They're even washable!
Package:
2 x LilyPad Button Board module for ArduinoWe designed this board to give the user a very discrete button without any edges. Button closes when you push it and opens when you release (momentary push button).
Each LilyPad was creatively designed to have large connecting pads to allow them to be sewn into clothing. Various input, output, power, and sensor boards are available. They're even washable!
Dimensions:
8mm x 16mm
Thin 0.8mm PCB
Package Includes:
2 x LilyPad Button Board module for Arduino
Getting started with Lilypad button sensor board
Rocker Switches house a button for operation that can be pressed on either end like a seesaw to connect or disconnect an electrical circuit. They are often used as ON/OFF switches on the main power supplies for electronic devices.
Features:
- Rating: 3A 250V
- Mounting hole: 20mm
- Poles: SPST
- Terminal: 2-Pin(ON-OFF)
- Contact resistance: ≤30mΩ
- Insulation resistance: ≥100MΩ at 500V DC
- Dielectric strength: 1500V AC for 1 minute
- Operating temperature: -25°C - 85°C
- Electrical life: 10000 cycles
- Color: black
Package included:
1 x Mini round black rocker switch
Resources:
Introduction to Buttons and Switches
Types of buttons and switches
Switching power supplies are designed for high efficiency and small size. They incorporate a switching regulator to convert electrical power efficiently. Switching DC power supplies regulate the output voltage through a process called pulse width modulation (PWM).
These are commonly used in 3D printing and CNC
Specifications
- Input: AC100-240V 50/60Hz
- Output: DC 12V
- Shell Material: Aluminum
- Safety Compliance: CCC / CE /Rohs
- High price-effective, reliability with industry standards
- 100% full load burn-in test
- Universal AC input / full range
- It's good quality & high performance
- Cooling by free air convection.
- Not suggested for use in a bathroom
- Built-in over voltage, over current, and short circuit protection
- Working Temperature: 0~40℃
- Storage Temperature: -20~60℃
- Ambient Humidity: 0~95% Non-Condensation
Features
- Switch power supply, convert AC 110V/240V to 12V
- Wide input voltage range, steady and precise output voltage.
- Shortage protection, overload protection over voltage protection.
- Widely used as the power adapter for Led strip, LED display, billboard, industrial equipment, etc.
Please note: INDOOR USE ONLY!
Package includes
1 x 12V 5A power supply
This temperature activated project kit is also available as a light activated project kit. The output of this board can be used to control other electronic circuits, turning them on automatically when it goes hot or cold.
The board has space for an LED with current limit resistor (both available separately) which will light when the output turns on.
The Darlington pair transistor configuration allows an output current of up to half an amp to be controlled. Operating voltage 3V to 10V (lower voltages allow for better adjustment of the switching point).
Features:
- The Temperature Switch Kit detects the temperature of its surroundings using a thermistor.
- The kit acts as an automated on/off switch (temperature dependent).

Contents:
- 1 x 47KΩ Potentiometer.
- 2 x BC337 NPN Transistors.
- 1 x Thermistor.
- 1 x 220Ω Resistor.
- 1 x Heat Activated Switch PCB
Possible applications include:
- Babies bath over temperature indicator.
- Automatic fan.
Dimensions:
- PCB Length: 53mm.
- PCB Width: 25.5mm.
Requires:
Resources:
Note:
- This kit requires soldering.
Description:
As micro:bit is gaining traction in this region, powering it is a must :)
If you are new to micro:bit, it is a powerful embedded platform or microcontroller board with easy to get started features, even easier than Arduino. It can be powered by USB micro B when loading the program, or you can use 2 x AAA batteries. So here comes the battery holder for this microcontroller.
This is a 2 x AAA battery holder for micro:bit with cover and ON/OFF slide switch. Neat!
Note: Battery & micro:bit is not included.
Features:
- Terminated with 2-way JST connector, match with battery input on micro:bit
- Holder for 2 x AAA batteries
- ON/OFF slide switch
- Comes with cover
What's in the box?
1 x Battery Holder with On/Off SwitchSimple ON and OFF switch. This is a panel-mount SPDT (single pole double throw) toggle switch.
This 3 pins toggle switch is great for any project where you have two options to select between. Maybe you'll be selecting between two voltages? Two audio outputs? Two sensor inputs? It's up to you! It's short, sweet, blue, and to the point! The part is marked at 3A 250VAC and 6A 125VAC but we haven't tested it at such high current/voltages and don't recommend it for more than 2A at 24V.
Features:
SPDT 3 Terminal ON-ON 2 - Position Latching Toggle Switch.
Each switch is assembled with two hex nuts, a flat and a locking washer.
Easy installation, fits into any 6mm hole.
Stated Electrical Spec: 3A 250VAC or 6A 125VAC, but we recommend using it at 2A at 24V
Packing List:
1 x 3 pins Toggle Switch
SONOFF 4CH R3 & 4CH PRO R3 are both 4-gang DIY Wi-Fi Smart Switches designed to give you the ability to integrate smart control into your existing home to enable a smart home. Each smart switch has 4 gangs that can be used to control lights and other home appliances at the same time in four areas of your home. There is a major difference between 4CH R3 and 4CH PRO R3, which is 4CH PRO R3 is designed with an additional function for RF control. The function is purposely adopted to make you turn on/off the device connected with 4CH PRO R3 via the RM433 remote controller.
Actually, SONOFF has ever released two types of 4-gang smart switch (4CH R2 and 4CH PRO R2.) which comes with almost same functions with 4CH R3 and 4CH PRO R3. But all the above units are still different in 3 working modes including self-locking, interlock and inching mode. The new improvement on 4CH R3 and 4CH PRO R3 compared with 4CH R2 and 4CH PRO R2 is for users to set these 3 working modes on eWeLink APP instead of the hardware itself, easier to operate. So you can enable self-locking mode to turn on/off 4 connected devices separately, interlock mode to turn on 1 connected device every time and turn off the rest of devices simultaneously and inching mode to turn on 1 connected device and then make it turn off automatically after a given time (0.5 - 3600s). For the device away from the switch, you can create a moveable space in virtue of a DIN rail to make them be connected. Simply activate devices through your voice when the switch works with Alexa and Google Home smart assistant.
Features:
- Remotely control connected lights or devices via APP
- 3 working modes with self-locking, interlock and inching mode for even remote control garage door and roller blinds
- Support scheduling a timer to make devices automatically start and stop to work
- Customize smart scenes to make the device connected with the switch to trigger other devices
- Share the control permission of devices to other accounts to control together
- Check real-time ON/OFF status of devices on your mobile phone
- Power on state allows users to set the On/Off/Keep status for the connected device before power failure and ensure it remains the arranged status after power restoration
4CH PRO R3 Specifications:
Voltage Range: 100-240V AC 50/60Hz(DC: 9-23V)
Max. Load: 10A/2200W/Gang 40A/8800W/Total
Wireless Frequency: WiFi 2.4GHz
Wireless Standard: IEEE802.11 b/g/n 2.4GHz2.4GHz(2400M-2483.5M);
Security Mechanism: WPA/WPA2
Enclosure Material: PCV0
Gang: 4
Dimension:145*90*34 (mm)
Operating Temperature(recommended): -10ºC-40ºC(14°F-104°F)
Operating Humidity: 5%-95%RH, Non-condensing
4CH PRO R3 Certification: CE(Download), FCC (Download)
Download Center:
4CH R3 4CH PRO R3 User Manual
4CH R3 4CH PRO R3 Specification
4CH R3 4CH PRO R3 Quick Installation Guide
Package includes:
1 x Sonoff 4CH PRO R3
1 x User Manual
Great for adding a power switch to your Raspberry Pi without any modifications required to your Pi or your power cable.
Specifications :
- Interface : USB Type C Female to USB Type C Male
- Current : 3A
- Length : 270mm approx
- Weight : 34g approx
- Use for : Raspberry Pi 4
- With ON/OFF switch button , so that you can power on and off the Raspberry Pi conveniently.
- Colour: black
What's in the box :
1 x USB Type C Power Cable with switch
Great for adding a power switch to your Raspberry Pi without any modifications required to your Pi or your power cable.
Specifications :
1. Interface : USB Type C Female to USB Type C Male
2. Current : 3A
3. Length : 270mm approx
4. Weight : 34g approx
5. Use for : Raspberry Pi 4
6. With ON/OFF switch button , so that you can power on and off the Raspberry Pi conveniently.
7. Colour: White
Package Includes :
1 x USB Type C Power Cable with switch
Note 1: Battery not included(3V CR2450)
Note 2: SNZB-01 must be used with Zigbee Bridge.
SONOFF SNZB-01 Zigbee Wireless Switch is a mini and exquisite ZigBee wireless smart switch replying on SONOFF ZigBee Bridge that allows you to reach the purpose of scene linkages between ZigBee devices (SONOFF BASICZBR3 DIY smart switch and S31 Lite zb smart plug) and Wi-Fi devices. The button switch is customizable with three control options - single, double press and long press, so you can, pretty easily, program routines and actions as simple as you require. One-tap pairing. It’s so much easier to pair it with multiple connected devices that you want to manage, just tap on the APP to get all devices paired. The brilliance of the button lines in its flexible movability, you can strategically place it or move it around your house to where it will be most helpful, then create a smart scene to make it work for you based on different button actions that you customized. Two-way control is even available for you to turn on/off the light from two locations. The button is battery-operated that your mobile phone will receive a low-battery notification when the remaining battery level is less than 10%, maybe it’s time to change the battery. Note: 1. Do not install on the metal surface, otherwise it will affect the wireless communication distance. 2. The installation height of less than 2 m is recommended. 3.The device can be operated intelligently via working with the SONOFF ZigBee Bridge to communitcate with other devices.
SONOFF ZBMINI is a ZigBee-enabled two-way smart switch that is compatible with different hubs, including SONOFF ZBBridge, Amazon Hub, Samsung SmartThings Hub and Philips Hue Hub. The ZigBee3.0 protocol gets ZBMINI and ZigBee bridge to be paired in a quick way. ZBMINI is safer to use in you home that is promised by the fire-proof and flame-retardant shell. Additionally, AES-128 encryption ensures the safety is extended to data device privacy, no worry about privacy disclosure of your device. It can be as a Zigbee router to help transmit the ZigBee signal to ensure a stable connection when multiple Zigbee devices are used for your home. If you are keen on two-way control, you can connect a Single Pole Double Throw switch as the external connection to expand the control way.



SONOFF BASICZBR3 is the first SONOFF ZigBee DIY Smart Switch that connects SmartThings hub to control all the connected appliances via SmartThing APP on iOS/Android phones to access rooms, scenes, members or automations mode to build a smart house. Seamlessly works with Amazon Alexa platforms including ZE39KL Echo Plus, Echo Studio, DW84JL 2nd Gen Echo Show & L9D29R 2nd Gen Echo Plus, directly pair with ZigBee smart switch via your voice, just say: “Alexa, find device” and see.Plus, more triggering conditions like schedule, device, location and alarm can be used to make appliances connected with Zigbee smart switch activated or inactivated. Follow SONOFF ZigBee smart switch to start your a new smart home journey!

Product Features:
Compatible with Amazon Alexa. Works with SmartThings hub . Set sunrise and sunset routine to turn on or off light. Hands-free voice control. Schedule devices on or off. Turn on or off lights based on your location. Customize devices to trigger devices.
Rocker Switches house a button for operation that can be pressed on either end like a seesaw to connect or disconnect an electrical circuit. They are often used as ON/OFF switches on the main power supplies for electronic devices.
Specifications:
- 250 V
- 3A
- 10mm x 15mm
1 x Black Mini Rocker Switch
Resources:
Python library
Introduction to Buttons and Switches
Types of buttons and switches
Spare key for the isolator switch
This handy switch can be used to disconnect your battery from your projects
Material: Nylon
What's in the box?
1 x battery isolator switch key(spare key only)
This handy switch can be used to disconnect your battery from your projects
Spare keys are available here
What's in the box?
1 x battery isolator switch