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: <= 36V
• Mounting hole: 14mm
• Poles: SPST
• Terminal: 2-Pin(ON-OFF)
• Colour: black

What's in the box?

1 x Mini round black rocker switch

Resources

Introduction to Buttons and Switches
Types of buttons and switches

High Quality Limit Switch for CNC machines or 3D Printers. These End Switch Modules are spares to replace broken or faulty limit switches on all three axes.

What's in the box?

1 x Limit Switch
1 x 3 core cable

• Wide input range, high precision voltage.
• Overload protection
• Short circuit protection
• Over temperature protection
• Input:100-240V AC 50/60Hz
• Output: DC 9V 1000mA
• Plug: EU Plug
• Dimension: 70mm x 80mm x 28mm
• Cable length: about 100cm
• DC Plug Dimension: 5.5mm x 2.5mm
• Colour: Black
• EU type

Please note: Pic is for illustration purposes only

The 1N4007 is used as a general-purpose diode. It is normally constructed to be used as a rectifier in the power supply section of electronic devices to convert AC voltage to DC voltage with other filter capacitors.

Specifications

• 1N4007 Diode
• rectifying
• standard 1A 1000V
• DO-41

What's in the box?

5 x diodes

 
Resources

Intoduction
Basics, Types, Characteristics, Applications & Packages

• This product is mainly used for water metering
  
• High amplitude ≥ 4.6V
  
• Low amplitude ≤ 0.5V
  
• Electric strength 1250V/min
  
• Insulation resistance ≥ 100MΩ
  
• Hydrostatic pressure testing ≤ 2.0Mpa
  
  

• The lowest rated working voltage: DC4.5 5V-24V
  
• Maximum operating current: 15 mA (DC 5V)
  
• Working voltage range: DC 5~18 v
  
• Load capacity: ≤ 10 mA (DC 5V)
  
• Use temperature: ≤ 80°C
  
• Operating humidity range: 35%~90%RH (no frost)
  
• Allowing pressure: pressure 2.0Mpa
  
• Temperature: -25~ 80 °C
  
• External threads: 1/2"
  
• Outer diameter: 20mm
  
• Intake diameter: 9mm
  
• Outlet diameter: 12mm
  
  

• View the project details here
• And some more help here
• Article specific to the anemometer only

• Voltage: DC 12V
• Current: 0.08A
• Size: 40mm x 40mm x 10mm
• Colour: Black

• High performance
• Small volume, easily embeded to other products
• Strong function, with the support of lwIP protocol, freertos
• Support three modes: AP, STA and AP STA
• Support for lua program, easy to develop

Features

MQ-2:
Detection concentration: 300-1000ppm(combustible gas).

MQ-3:
Used in motor vehicles and other no drunken drivers homework personnel on-site testing, also used in other places of ethanol vapor detection.

Size: 32 x 22 x 27mm
Main chip: LM393, ZYMQ - 3 gas sensors
Working voltage: DC 5V
1, With a signal output instructions.
2, Two-way signal output (TTL level output and analog output)
3, TTL output signal for low level effectively.(when the low output electric signal lights at ordinary times, can be directly by single chip microcomputer)
4, Analog 0 - 5V voltage, the higher the concentration, the higher the voltage.
5, To ethanol steam has a high sensitivity and good selectivity.
6, In June and has long service life and reliable stability.
7, Rapid response recovery features.


MQ-4:

1, Using high-quality dual-panel design, with power indicator and TTL signal output instructions;
2, With a DO switch signal (TTL) output and AO analog signal output;
3, TTL output valid signal is low. (When the output low signal light can be directly connected microcontroller or relay module)
4, The analog output voltage, the higher the concentration the higher the voltage.
5, Methane, natural gas has better detection sensitivity.
6, There are four screw holes for easy positioning;
7, Product Dimensions: 32 (L) * 20 (W) * 22 (H)
8, With a long service life and reliable stability
9, Rapid response and recovery characteristics
 
Electrical properties
Input voltage: DC5V power (current): 150mA
DO output: TTL digital 0 and 1 (0.1 and 5V)
AO output :0.1-0 .3 V (relatively clean), the highest concentration of voltage around 4V

MQ-5:

Suitable for home or industrial on LPG, natural gas, coal gas monitoring devices. Excellent resistance to alcohol, smoke interference.


1, Using high-quality dual-panel design, with power indicator and TTL signal output instructions;
2, With a DO switch signal (TTL) output and AO analog signal output;
3, TTL output valid signal is low. (When the output low signal light can be directly connected microcontroller or relay module)
4, The analog output voltage, the higher the concentration the higher the voltage.
5, For gas, natural gas has better detection sensitivity.
6, There are four screw holes for easy positioning;
7, Product Dimensions: 32* 20 * 22
8, With a long service life and reliable stability
9, Rapid response and recovery characteristics
 
Electrical properties
Input voltage: DC5V power (current): 150mA
DO output: TTL digital 0 and 1 (0.1 and 5V)
AO output :0.1-0 .3 V (relatively clean), the highest concentration of voltage around 4V

MQ-6:

Suitable for domestic or industrial on LPG (liquefied petroleum gas), butane, propane, LNG (liquefied natural gas) detection devices. Excellent resistance to ethanol vapor, smoke interference.

1, Using high-quality dual-panel design, with power indicator and TTL signal output instructions;
2, With a DO switch signal (TTL) output and AO analog signal output;
3, TTL output valid signal is low. (When the output low signal light can be directly connected microcontroller or relay module)
4, 0 ~ 5V analog output voltage, the higher the concentration the higher the voltage.
5, The propane, butane, LPG, LNG has a good detection sensitivity.
6, There are four screw holes for easy positioning;
7, Product Dimensions: 32 (L) * 20 (W) * 22 (H)
8, With a long service life and reliable stability
9, Rapid response and recovery characteristics
 
Electrical properties
Input voltage: DC5V power (current): 150mA
DO output: TTL digital 0 and 1 (0.1 and 5V)
AO output :0.1-0 .3 V (relatively clean), the highest concentration of voltage around 4V

MQ-7:

For home, carbon monoxide detection device environment. Suitable for carbon monoxide and gas detection.

Detection of concentration: 10-1000ppmCO
Loop voltage Vc: <=10V DC
Heater voltage Vh: 5.0V ±0.2V  ACorDC(high)
Load resistance: adjustable.
Heater  resistance RH: 31ohm ± 3 ohm(room temperature)
Heater power consumption PH: <=350mW

Standard test conditions
Temperature: 20 degree ± 2 degree
Humidity: 65% ± 5% RH
Standard test circuit: Vc: 5.0V ± 0.1V; Vh(high):5.0V±0.1V
                                   Vh(low):1.5V±0.1V

1, The analog output voltage, the higher the concentration the higher the voltage.
2, The carbon monoxide detection with better sensitivity.
3, There are four screw holes for easy positioning;
4, Product Dimensions: 32 (L) * 20 (W) * 22 (H)
5, With a long service life and reliable stability
6, Rapid response and recovery characteristics
 
Electrical properties
Input voltage: DC5V power (current): 150mA
DO output: TTL digital 0 and 1 (0.1 and 5V)
AO output :0.1-0 .3 V (relatively clean), the highest concentration of voltage around 4V

MQ-8:

Suitable for domestic or industrial hydrogen leak on a monitoring device. Are not subject to ethanol vapor, soot, carbon monoxide and other gases interference.

MQ-9:

For home or factory gas leak detection device, suitable for carbon monoxide, combustible gas monitoring device.

Can test carbon monoxide: 10 to 1000ppm CO
Combustible gas range: 100 to 10000ppm

Loop voltage Vc: <=10V DC
Heater voltage Vh: 5.0V ±0.2V  ACorDC
Heater resistance: 31 ohm ± 3 ohm(room temperature).
Heater power consumption PH: <=900mW
Standard test conditions:
Temperature: 20 degree ± 2 degree
Humidity: 65% ± 5% RH
Standard test circuit: Vc: 5.0V ± 0.1V
Vh:5.0V±0.1V
Warm up time: more than 48 hours.

MQ-135:

MQ135 gas sensor is sensitive material used in clean air, low conductivity tin dioxide (SnO2). When the sensor is kept in their environment
The contaminated gas, the conductivity of the sensor with the air pollution gas concentration increases. Using a simple circuit can be changes in the conductivity
Of the concentration of the gas is converted to the corresponding output signal.
MQ135 sensor for ammonia, sulfide, benzene vapor high sensitivity, smoke and other harmful monitor is also very satisfactory. This sensor can detect a
Measuring a variety of harmful gases, is a low-cost sensors for a variety of applications.

Module Applications
For home, environmental harmful gas detection device, suitable for ammonia, aromatic compounds, sulfur, benzene vapor, smoke and other gases harmful gas detection, gas sensors tested concentration range: 10 to 1000ppm.

Loop voltage Vc: <=24V DC
Heater voltage Vh: 5.0V ±0.2V  ACorDC
Load resistance: Adjustable
Heater resistance: 31 ohm ± 3 ohm(room temperature).
Heater power consumption PH: <=900mW
Sensitive body surface resistance Rs:2K ohm - 20K ohm(in 100ppm NH3)
sensitivity S: Rs(in air)/ Rs(100ppmNH3)>=5
Standard test conditions:
Temperature: 20 degree ± 2 degree
Humidity: 65% ± 5% RH
Standard test circuit: Vc: 5.0V ± 0.1V
Vh:5.0V±0.1V
Warm up time: More than 48 hours.

What's in the box?

1 x MQ2
1 x MQ-3
1 x MQ-4
1 x MQ-5
1 x MQ-6
1 x MQ-7
1 x MQ-8
1 x MQ-9
1 x MQ-135

Analog to digital converter not included
Configure and read MQ-x gas sensor

• Temperature measurement range: -55°C ~ +125°C
  
• Accuracy: ± 0.5°C
  
• Encapsulation: TO-92

• Material: Plastic and Metal
• Shape: round
• Turns: 10 turns
• Technics: wirewound
• Independent linearity: ±0.25%
• Resistance: 10K Ω
• Resistance tolerance: ±2 ~ ±10%
• Power-rating: 2W
• Angle of rotation: 3600±5°
• Rotational life (no load) cycles: 1,000,000
• Shaft diameter: 6.35mm
• Operating temperature range: 1℃ ~ 125℃
• Storage temperature: -55 ~ 125℃

• 1pcs 10 turn potentiometer
• 1pcs rotary dial knob
• 1pcs small Hexagonal spanner

• Setup
• Python Library
• Definition, Types, And Working Principle

Refillable flux pens for all your rework needs including no-clean, rosin and water soluble. Liquid Solder Flux Pen is used to clean PCB track and legs or pins of electronic components while soldering.

Specifications

• No-Clean Flux
• Net volume: 10ml
• Shelf life @ 25 degree C: 2 year
• Push the pen tip to start the flux flow
• Keep the pen cap on when not in use

Warning

• When coming into contact with skin, please wash the area immediately to avoid skin irritation.
• Do not consume.
• Please store in a safe location where children can not reach it.

The ESP32-CAM is a small size, low power consumption camera module based on ESP32. It comes with an OV2640 camera and provides onboard TF card slot. The ESP32-CAM can be widely used in intelligent IoT applications such as wireless video monitoring, WiFi image upload, QR identification, and so on.

Specifications

• Low-power dual-core 32-bit CPU for application processors
• Main frequency up to 240MHz, computing power up to 600 DMIPS
• Built-in 2MB PSRAM
• Built-in 520 KB SRAM
• Supports interfaces such as UART/SPI/I2C/PWM/ADC/DAC
• Support OV2640 and OV7670 cameras, built-in flash
• Support image WiFi upload
• Support TF card
• Support multiple sleep modes
• Embedded Lwip and FreeRTOS
• Support STA/AP/STA AP working mode
• Support Smart Config/AirKiss one-click distribution network
• Support secondary development

What's in the box?

1 x ESP32-cam board
1 x pigtail
1 x antenna

You might also need the Esp32-Cam MB Micro-USB Programmer

A product that is widely used in 3D Printer, Humidifier, Cool Xbox, PC CPU Server, etc. It has intelligent industrial control equipment plate cooling heat. With high Precision Medical equipment cooling. Often used for PC RAM Card Cooling Dissipation.
The Fan is also suitable for daily general use for electronics that need cooling.


Specifications

•     Bearing Type: Hydraulic Bearing
•     Rated Voltage: DC 24V
•     Connector Type: XH2.54-2PIN
•     Cable Length: 15cm
•     Current: 0.08A

What's in the box?

1 x 40mm Blower Fan

This is a wireless soil moisture sensor with a monitor(display). The soil moisture sensor will detect the data, then transmit to the receiver(display) wirelessly(433Mhz).

Function:

• 12/24hr digital time display
• Current soil moisture.
• Every 70 second the unit will receive soil moisture sensor.
• Wireless Signal Strength Indicator.
  
  

1. Time Display
2. Soil Moisture Value Display
3. Soil Moisture Grade Display

1. Hanging Hole
2. Tabletop Stand
3. ADD+ Button
4. Set Button
5. Battery Compartment
6. Battery Compartment Cover

• Base station (display console) : 1 x AA 1.5v battery (not included)
• Remote sensor : 1 x AA 1.5v battery (not included)

• Moisture Range: 0~100%; Resolution: 1%
• 0% AD setting range: 70~200; Initial value:70
• 100% AD setting range: 0% AD+10~1000; Initial value:500
• Frequency: 433 MHz
• Update Rate: 70 seconds
• Power Consumption: approx. 1 Year battery life.
  
  
  

1 x Soil Moisture Monitor (Receiver)
1 x Soil Moisture Sensor (transmitter)
1 x User Manual(in English)

The LM35-series devices are precision integrated-circuit temperature sensors, with an output voltage linearly proportional to the Centigrade temperature. The LM35 device has an advantage over linear temperature sensors calibrated in Kelvin, as the user is not required to subtract a large constant voltage from the output to obtain convenient Centigrade scaling. The LM35 device does not require any external calibration or trimming to provide typical accuracies of ± ¼ °C at room temperature and ± ¾ °C over a full −55°C to 150°C temperature range. Lower cost is assured by trimming and calibration at the wafer level. The low output impedance, linear output, and precise inherent calibration of the LM35 device makes interfacing to readout or control circuitry especially easy. The device is used with single power supplies, or with plus and minus supplies. As the LM35 device draws only 60 μA from the supply, it has very low self-heating of less than 0.1°C in still air. The LM35 device is rated to operate over a −55°C to 150°C temperature range

Features

• Calibrated Directly in Celsius (Centigrade)
• Linear 10-mV/°C Scale Factor
• 0.5°C Ensured Accuracy (at 25°C)
• Rated for Full −55°C to 150°C Range
• Suitable for Remote Applications
• Low-Cost Due to Wafer-Level Trimming
• Operates From 4 V to 30 V
• Less Than 60-μA Current Drain
• Low Self-Heating, 0.08°C in Still Air
• Non-Linearity Only ±¼°C Typical
• Low-Impedance Output, 0.1 Ω for 1-mA Load

Applications

• Power Supplies
• Battery Management
• HVAC
• Appliances

What's in the box?

1 x LM35DZ temperature sensor

BME280 is a high-precision, small-volume, low-energy pressure sensor that can be used in mobile devices. Its performance is excellent, the absolute accuracy can be as low as 0.2Pa, and the power consumption is very low, only 2.7uA. The BMP280 uses a powerful 8-pin ceramic leadless chip in a thin carrier (LCC) package, which can be directly connected to various microprocessors through I2C and SPI buses.

Features

• Pressure range: 300~1100hPa (altitude 9000m~-500m) Power supply voltage: 1.71V~3.6V
• LCC8 Package: Lead-Free Ceramic Carrier Package (LCC)
• High precision: 0.06hPa (0.5m) resolution in low power mode, 0.2Pa (1.7cm) resolution in high linear mode temperature output
• 12C interface, SPI interface temperature compensation
• Temperature compensation
• Size: 1.5cmx 1.15cm
• Low power consumption: 2.7uA
• No external clock circuit required

Typical application

• GPS precise navigation (dead reckoning, upper and lower bridge detection, etc.) indoor and outdoor navigation
• Monitoring weather forecast for leisure, sports and health care
• Vertical Speed Indication (Rise/Sink Speed) Fan Power Control

Specifications

• Supply Voltage: 1.8 - 5V DC
  
• Interface: I2C (up to 3.4MHz), SPI (up to 10 MHz)
  

Operational Range:

• Temperature: -40 to +85°C
  
• Humidity: 0-100%
  
• Pressure: 300-1100 hPa
  

Resolution:

• Temperature: 0.01°C
  
• Humidity: 0.008%
  
• Pressure: 0.18Pa
  

Accuracy:

• Temperature: +-1°C
  
• Humidity: +-3%
  
• Pressure: +-1Pa
  

I2C address

• SDO LOW : 0x76
  
• SDO HIGH: 0x77

What's in the box?

1 x bme280 sensor
1 x header

Resources

The Raspberry Pi Foundation Project

• High temperature masking tape
• Frequency conversion power supply in the electronics industry. Also use as perfect heat resistance ribbon on 3d printing, powder coating, etc
• PCB protection during wave soldering
• Insulation on transformers, motors and coils
• Fiber Optic Cables
• Solar panels

• 100% new and high quality
• Material: Polyimide
• Color: Brown Metallic
• Width: 5mm
• Length: 22 M
• Long term temperature: 260 ° C degrees
• Short term temperature: 300 ° c.

This kind of 8 way joystick is originally used in arcade games, but we think it is a good solution for DIY projects that need multiple frequency buttons. There is 4 micro switches that detect the stick position and users can easily get the stick positions by reading the voltage output from the connector with a controller such as Arduino and Raspberry Pi.

Features 

• 8 way operation.
• Mountable in control panels.
• Easy to operate with high sensitivity.
• Use it to DIY your own Arcade gaming machine.

Specifications 

• Top Ball Diameter: Approx. 35mm
• Total Size: Approx. 95x60x100mm

1 x Joystick
Cables not included

Resources
 

• Learn about RetroPie
• Compatible with Zero Delay Arcade USB Encoder & Wire Set (Not included)
  
• Compatible buttons
  
  

This is split-core current transformer is an AC current sensor. It is used for current measurement, monitor and protection for AC motors, lighting equipment, air compressors, home automation etc.

Features

- Opening size: 13x13mm
- Rated input current (RMS): 10% - 120% of that is 3A - 63A
- Output voltage(RMS): linear output. When the input current is 60A, the output voltage is 1V
- Linearity: ± 3%
- Output connectors: 3.5mm standard three-pin plug
- Lead length: 1 m

What's in the box?

1 x Current sensor


This sensor is perfect for use with our Raspberry Pi RPICT3T1 current and temperature sensor board.