Sensors
The unit is small and compact, requires only simple wiring. It boasts low power consumption and high switching capacity. And has several functional stability characteristics.
Specifications:
Type: water level sensor module
Power supply current: 20mA
Power supply voltage: DC12V
Power: 20W
Wiring
N Neutral in
L 12V in
N Neutral out
L2 12V out
What's in the box
1 x water level sensor module
- Product Name : Photoelectric sensor ( retroreflective type)
- Model : G18-3B2NC;
- Wire Type : DC 4 Wires Type (Brown, Black, Blue,White);
- Switch Appearance Type : Cylinder Type,
- Theory : Photoelectric sensor retroreflective type;
- Output Type : NPN NO NC (Normally Open and normally close);
- Diameter of Head : 18mm;
- Detecting Distance : 2m;
- Detecting Object : Metal, non metal (body, hand, paper, food ...), Transparent or opaque boday
- Supply Voltage : DC 10-30V;
- Current Output : 200mA;
- Response Frequency : 100Hz
- External Material : Plastic, Alloy
- Protection grade: IP66
What's in the box?
1 x sensor with mirror
IR (Infrared) sensor tuned to 38KHz, perfect for receiving commands from a TV remote control. Runs at 3V to 5V so it's great for use on the Raspberry Pi!
To use, connect pin 3 (all the way to the right) to 5V power, pin 2 (middle) to ground and listen on pin 1. It doesn't do any decoding of the signal, just passes the 'raw data' along.
Specifications:- Carrier Frequency: 38kHz
- Transmission Range: 45m
- Directivity: 45°
- Supply Voltage Min: 2.5V
- Supply Voltage Max: 5.5V
- Supply Current: 350µA
- Opto Case Style: Through Hole
- Operating Temperature Min: -25°C
- Operating Temperature Max: 85°C
- Packaging: Each
- Operating Temperature Range: -25°C to 85°C
- SVHC: No SVHC (16-Dec-2013)
- Supply Voltage Range: 2.5V to 5.5V
- Manufacturer: VISHAY MINICAST AGC2
- 1x Infrared Receiver
- Using an IR remote with a Raspberry Pi
PIR sensors, often referred to as, "Passive Infrared" or "IR motion" sensors, enable you to sense motion. Everything emits a small amount of infrared radiation (IR), and the hotter something is, the more radiation it emits. PIR sensors are able to detect a change in average IR levels of their detection zone (e.g. when a human enters a room, that room will increase in temperature slightly) and hence sense motion.
This one's great, as it can be powered via the Raspberry Pi's 5V output, and be read directly from the Raspberry Pi's GPIO input (as the sensor has a digital 3.3V output!)
This PIR includes an adjustable delay before firing (approx 0.5 - 200 seconds), has adjustable sensitivity and two M2 mounting holes! It runs on 4.5V-20V power (or 3V by bypassing the regulator with a bit of soldering) and has a digital signal output (3.3V) high, 0V low. Its sensing range is up to 7 meters in a 100 degree cone.
Specifications:
- Input Voltage: 4.5V - 20V
- Current Draw: <50µA
- Digital Output: 3.3V (High)
- Digital Output: 0V (Low)
- Working Temperature: -15°C to 70°C
- Delay Time: 0.5 - 200 Seconds
- Sensing Angle: 100° Cone
- Range 5m - 7m
Dimensions:
- Sensor Lens Diameter: 23mm
- Length: 24.03mm
- Width: 32.34mm
- Height (with lens): 24.66mm
- Centre screw hole distance: 28mm
- Screw hole diameter: 2mm (M2)
- 1x HC-SR501 Motion Sensor
This is a pre-wired and waterproofed version of the DS18B20 sensor. Handy for when you need to measure something far away, or in wet conditions. While the sensor is good up to 125°C the cable is jacketed in PVC so we suggest keeping it under 100°C. Because they are digital, you don't get any signal degradation even over long distances! These 1-wire digital temperature sensors are fairly precise (±0.5°C over much of the range) and can give up to 12 bits of precision from the onboard digital-to-analog converter. They work great with any microcontroller using a single digital pin, and you can even connect multiple ones to the same pin, each one has a unique 64-bit ID burned in at the factory to differentiate them. Usable with 3.0-5.0V systems.
The only downside is they use the Dallas 1-Wire protocol, which is somewhat complex, and requires a bunch of code to parse out the communication. If you want something really simple, and you have an analog input pin, the TMP36 is trivial to get going.
We toss in a 4.7k resistor, which is required as a pullup from the DATA to VCC line when using the sensor.
Specifications:Cable specs:
- Stainless steel tube 6mm diameter by 30mm long
- Cable is 36" long / 91cm, 4mm diameter
- Contains DS18B20 temperature sensor
- If your sensor has four wires - Red connects to 3-5V, Black connects to ground and White is data. The copper wire is soldered to the wire shielding
- If your sensor has three wires - Red connects to 3-5V, Blue/Black connects to ground and Yellow/White is data
DS18B20 Technical specs:
- Usable temperature range: -55 to 125°C (-67°F to 257°F)
- 9 to 12 bit selectable resolution
- Uses 1-Wire interface- requires only one digital pin for communication
- Unique 64 bit ID burned into chip
- Multiple sensors can share one pin
- ±0.5°C Accuracy from -10°C to 85°C
- Temperature-limit alarm system
- Query time is less than 750ms
- Usable with 3.0V to 5.5V power/data
- 1 x DS18B20 Digital temperature sensor
- 1 x 4.7k resistor
- Adafruit's Raspberry Pi Lesson: DS18B20 Temperature Sensing
This economical sensor provides 2cm to 400cm of non-contact measurement functionality with a ranging accuracy that can reach up to 3mm. Each HC-SR04 module includes an ultrasonic transmitter, a receiver and a control circuit.
There are only four pins that you need to worry about on the HC-SR04: VCC (Power), Trig (Trigger), Echo (Receive), and GND (Ground). You will find this sensor very easy to set up and use for your next range-finding project!
Specifications:
- Model: HC-SR04
- Color: Blue Silver
- Working voltage : 5V(DC)
- Static current: Less than 2mA.
- Output signal: Electric frequency signal, high level 5V, low level 0V.
- Sensor angle: Not more than 15 degrees.
- Detection distance: 2cm~450cm.
- High precision: Up to 3mm
- Mode of connection: VCC / trig(T) / echo(R) / GND
- Module Working Principle:
- Adopt IO trigger through supplying at least 10us sequence of high level signal
- The module automatically send eight 40khz square wave and automatically detect whether it receive the returning pulse signal
Resources:
A good tutorial available at ModMyPi.
http://www.modmypi.com/blog/hc-sr04-ultrasonic-range-sensor-on-the-raspberry-pi
Read the Docs
What's in the box:
1 x HC-SR04 distance sensor
This is a summary of the soil moisture sensor that can be used to detect moisture, when the soil is dry, the module outputs a high level. Use this sensor to build an automatic watering system.
Specifications:
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.
VCC: 3.3V-5V.
GND: GND.
DO: digital output interface (0 and 1).
AO: analog output interface.
Setup with Raspberry Pi
Package Includes:
1 x Soil moisture detector module
1 x Probe
5 x Jumper Cables
Photosensitive resistance is the resistance of a semiconductor material, the conductivity change when light intensity varies.
Photoresistors are widely used in toys, lamps, cameras and other industries.
Specifications:
Model: GL5516
Maximum voltage: 150V, DC
Maximum wattage: 90mW
Operating temperature: -30°C ~ 70°C
Spectral peak: 540nm
Bright resistance (10Lux) (KΩ): 5 - 10
Dark resistance: 0.5 MΩ
100λ10: 0.5
Response time: 20ms (Rise), 30ms (Down)
Resistance illumination: 2
Package includes:
2 x Photoresistors - GL5516
Read the Docs
This module can detect humidity and temperature of the surrounding environment. Outputs a digital signal. Has a mounting hole for easy installation. Includes 3 DuPont wires to interface to microcontroller.
Specifications:
Humidity measurement range: 20%~90% RH
Humidity measurement error: ±5% RH
Temperature measurement range: 0~60 C
Working voltage: 3.3 to 5V
Size: 28 x 12 x 8mm
What's int the box?
1 x DHT11 Temperature and Relative Humidity Sensor Module
Resources:
How to setup a DHT11 with your Raspberry Pi. The resistor is already on the PCB so you can skip the breadboard part
The sensor module light is adjustable to the environment, the working voltage is 3.3 V to 5 V.
It has a pair of infrared transmitting and receiving LEDs, when detecting obstacles (reflecting surface), receiving LED detects it.
After the comparator circuit processing, a green indicator will light up, at the same time the signal output interface will output a digital signal (a low level signal), can be adjusted to detection distance through the potentiometer, effective distance range 2 ~ 80 cm, easy to assemble and use. It can be widely used in robot obstacle avoidance, line following and so on in many projects.
Specifications:
Working voltage : 3.3V – 5V DC
Working current : ≥ 20mA
Working temperature : -10°C – 50°C
Detection distance : 2cm – 40cm
IO interface : 4-wire interface (-/ /S/EN)
Output signal : TTL level (low level if obstacle detected, high if no obstacle)
Adjustment method : multi-turn resistance adjustment
IR pulse frequency : 38kHz
Effective angle : 35°
Board Size : 1.6cm x 4cm
Weight : 9g
What's in the box?:
1 x Infrared Obstacle Avoidance Sensor
Description:
A DC-to-DC converter is an electronic circuit or electromechanical device that converts a source of direct current (DC) from one voltage level to another. It is a type of electric power converter.
Ideal for reading high 5V sensors on your SBC or Microcontrollers, or sending signals to 5V input devices
Specifications:
- Mutual conversion between 3V and 5V, It's convenient for PI connected to external 5V sensors or modules
- Supports total of 8 channels
- Range of voltage converted: 1.8V~6VDC
How to Use:
In the case of translating between 3.3V and 5V system:
VCCA connects to 3.3V power supply
VCCB connects to 5V power supply
GND connects to power negative pole respectively, the two power supply should be common-grounded with each other
When Ax has 3.3V input, Bx will get 5V output
When Bx has 5V input, Ax will get 3.3V output
NO direction control required
What's in the box?:
1 x Voltage Converter Module
Use this kit as inputs for sensing and outputs for reporting in your projects.
You are purchasing a fantastic set of components to get you started! You can
measure light, time, magnetic fields, temperature, humidity...you can measure sound and create sound, you can measure tilt and user input! All of these components are presented on easy to access boards and allow you to connect them rapidly to the Arduino or Raspberry Pi, RP2040 Pico, ESP board.
Specifications:
Product Dimensions: 10.63 x 7.09 x 1.73 inches
Item Weight: 14.1 ounces
Number of modules: 37
What's in the box?:
1 x XY JoyStick
1 x Relay
1 x Big Sound
1 x Small Microphone
1 x Tracking
1 x Avoid
1 x Flame
1 x Linear Hall
1 x Touch
1 x Digital Temperature
1 x Buzzer
1 x Passive Buzzer
1 x RGB LED
1 x SMD RGB
1 x 2-Color LED
1 x 2-Color
1 x Reed Switch
1 x Mini Reed
1 x Heartbeat
1 x 7 Color Flash
1 x Laser
1 x Button
1 x Shock
1 x Rotary Encoders
2 x Magic Cup
1 x Tilt Switch
1 x Ball Switch
1 x Photo resistor
1 x Temp and Humidity
1 x Analog Hall
1 x Hall Magnetic
1 x TEMP
1 x Analog Temp
1 x IR Emission
1 x IR Receiver
1 x Tap module
1 x Light Blocking
Resources:
We found a nice tutorial that covers most of the sensors here
We found this article explaining what the sensors are used for: http://www.instructables.com/id/Arduino-37-in-1-Sensors-Kit-Explained/?ALLSTEPS
Description:
AM2302 Humicap digital temperature and humidity module is a digital output signal containing a calibrated temperature and humidity combined sensor. It uses dedicated digital module capture technology and temperature and humidity sensor technology to ensure that products has high reliability and excellent long-term stability. Sensor includes a capacitive humidity sensing element and a high-precision temperature measurement device, and with a high-performance 8-bit microcontroller connected. Therefore, the product has excellent quality, fast response, anti-interference ability, low cost and other advantages. Ultra-small size, low power consumption, signal transmission distance up to 20 meters. Making it the best choice for all kinds of applications and even the most demanding applications.
Applications:
HVAC (Heating Ventilation Air Conditioning), dehumidifiers, testing and inspection equipment, consumer goods, automotive, automation, data loggers, home appliances, humidity regulator, medical,weather stations, and other related humidity detection control.
Specification:
Dimensions: 40 x 23mm
Weight: 4g
Voltage: 5V
Port: digital two-way single bus
Temperature range: -40 to 80 °C ± 0.5 °C
Humidity: 20 to 90% RH ± 2% RH
Platform: Arduino, SBC
Package includes:
1 x Sensor Module
How to setup a DHT22 with your Raspberry Pi.The resistor is already on the PCB so you can skip the breadboard part.
This digital barometer has some interesting applications. By measuring the absolute pressure of the environment and converting this into altitude. you will have a reliable sensor for determining the height of your robot, plane or projectile. This sensor is capable of achieving an accuracy of 1m, with noise of only 17cm in ultra-high resolution. The device will operate at only 0.3uA meaning low current draw for battery powered applications.
Specifications:
1.8V to 3.6V Supply Voltage
Low power consumption - 0.5uA at 1Hz
I2C interface
Max I2C Speed: 3.5 MHz
Very low noise - up to 0.02hPa (17cm)
Fully calibrated
Pressure Range: 300hPa to 1100hPa ( 9000m to -500m)
Weight: 1.18g
Size: 21mm x 18mm
Package includes:
1 x BMP180 Digital Barometric Pressure Sensor Board Module
1 x Male to Male 4 pin header
Resources:
Using the BMP180 with Raspberry Pi
Description:
LM393 Sound Detection Sensor Module for controller detects whether the sound has exceeded a threshold value. The sound is detected via a microphone and fed into an LM393 op-amp. The sound level setpoint is set via an onboard potentiometer.
Can be used for Acoustic control light; give sound and light alarm working with Photosensitive sensor
Note: The Maximum induction distance is 0.5M
- Main Chip: LM393, Electret condenser microphone
- Working Voltage: DC 4-6V
- Signal output indication
- Single channel signal output
- The output effective signal is low level
- When there is sound,output low level and the signal lights
1 x LM393 Sound Detection Sensor
Resources:
Find help with this sensor at https://www.instructables.com/id/Sound-Sensor-Raspberry-Pi/
Description:
The liquid level switch detects the rising level of liquid in a sump or tank. It can be connected to a micro controller. It can then be used to start/stop a pump which then pumps liquid in/out until the level of the liquid has been restored to the point where the pump is switched off again. The switch may be used in a pump station, a sensor, a tank alarm, or other devices.
Specification:
Contact Rating: 10W
Switching Voltage: 220V
Switching Current: 0.5A
Breakdown Voltage: 220VDC
Carry Current: 1.0A
Contact Resistance: 100mohm
What's in the box:
1 x Liquid Water level sensor
Resources:
Python library
Introduction to Buttons and Switches
Types of buttons and switches
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
Specification:
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
Application:
Water heaters, water vending machines, flow measurement
Package included:
1x Water flow sensor
Flow sensor Wiki
An instructable on how to use the Flow Sensor with Arduino
Adafruit experiment connecting the Flow Sensor to a Raspberry Pi
https://www.ardumotive.com/water-flow-sensor-en.html
RPi: https://www.youtube.com/watch?v=8JXd-2_zJQ0
A compact vertically mounted float switch which can be mounted at either the top or bottom of a tank (by the supplied 'O' ring and nut) to either rise or fall for activation (internal magnet) of a sealed reed relay.
The sensor is supplied pre-wired with flying output leads.
Float switch is a used to sense the level of liquid within a tank, used to activate a pump, an indicator, an alarm or other device.
Use them with hydroponics, saltwater tanks, freshwater tanks, gardening, aquariums for power head control, pet bowls, fish tanks, filtration, heating, or what ever your project may be
Contains no mercury
Down float switch
Specifications :
- Maximum Load: 50 W
- Max Switching Voltage: 100V DC
- Minimum Voltage: 250V DC
- Maximum Switching Current: 0.5 A
- Max Load Current: 1.0 A
- Max Contact Resistance: 0.4 Ω
- Temp Rating: -20~ 80℃
- Net Weight: 12g
- Material: PP
Package includes :
1 x Liquid Float Switch
Resources:
Python library
Introduction to Buttons and Switches
Types of buttons and switches
MS Anemometer as used in the Raspberry Pi foundation weather station project to measure windspeed.
Hack this component to form part of your weather station.
Specifications:
| Sensor | 3-cup anemometer |
| Measurement Description | Wind speed |
| Range | 0 to 45 m/s (0 to 100 mph) |
| Starting Threshold | 0.45 m/s (1.0 mph) |
| Accuracy | 0.11 m/s (0.25 mph) or 1.5% |
| Contact Rating | 10 mA (maximum) |
| Operating Temperature Range | -50° to 70°C |
| Distance Constant |
|
| Cable Description | Quick-connect connector with vinyl jacketed, shielded cable |
What's in the box?:
1 x Anemometer
Resources:
View the project details here
And some more help here
Article specific to the anemometer only
MS wind vane as used in the Raspberry Pi foundation weather station project to measure wind direction.
Hack this component to form part of your weather station.
Specifications:
| Range | 0 to 360° (352° electrical, 8° open) |
| Accuracy | 1% of full scale |
| Operating Voltage | 10-36 VDC |
| Sensitivity | 1 m/s (2.2 mph) |
Resources:
View the project details here
And some more help here
Article specific to the wind vane only