|Now FREE Delivery on UK mainland orders over £30+VAT|
2 inch 8 ohm Miniature Speaker
Solderless Male to Female Jumper Leads - set of 40
This set of coloured male to female jumper leads can be used intact, or peeled appart into small sets or single leads. Great for prototyping with Arduino, Raspbery Pi and other projects
Keep track easily with 10 different colours for quick fault finding.
4 of each: Red, Orange, Yellow, Green, Blue, Grey, Purple, Brown, Black and White
Each length: 200mm
Data Logger Shield with Real Time Clock for Arduino Uno
This Arduino compatible shield allows the logging and storage data from an Arduino project to an SD card.
Having a built in Real Time Clock (RTC) insures data accuracy over long time periods and at times where your project may suffer from power loss. Supplied with a CR1220 lithium battery.
Digital temperature sensor module for Arduino and other microcontroller projects
This module uses an NTC thermister to sense the temperature. It also has a comparator to give a digital output as well as an analogue output and a potentiometer to adjust the level for the digital output.
Voltage : 5VDC
Solderless Female to Female Jumper Leads in a set of 40
This set of coloured female to female jumper leads can be used together or peeled apart into smaller sets or single leads. They are great for prototyping with boards like Arduinos and Raspberry Pi.
With 10 different colours and 4 of each colour, it's easy to keep track for quick fault finding.
Colours: Red, Orange, Yellow, Green, Blue, Grey, Purple, Brown, Black and White
Barometric pressure sensor module for Arduino and other microcontroller projects
This tiny module has a BMP180 precision pressure sensor soldered on to a GY-68 breakout board to make it easy to use this amazing sensor. The BMP180 will give you accurate pressure data via the standard I2C protocol making it simple to add to your project.
Voltage : 1.8 - 3.6VDC
Preasure Range 300hPa to 1100hPa (-500m to 9000m)
Current consumption 0.5µA
What is the CJUMCU-811 Module?
CO2 and VOC indoor air quality sensor module for Arduino and other microcontroller projects
This module has a CCS811 module that is an ultra low powered digital gas sensor using a metal oxide multi compound sensor. The module uses the onboard MCU to manage the sensor and provide the needed Analogue to Digital conversion and I2C interface making it simple to add to your project. It will detect a wide range of VOCs including Carbon Monoxide and can convert this to an eCO2 (equivalent CO2) value.
How Can I use the CJUMCU-811 to test air quality and CO2 levels?
Air Quality Sensor with LCD
In this project, we will be building an air quality station that can measure eCO2 (estimated carbon dioxide) levels and a wide range of VOCs (Volatile Organic Compounds). High VOC levels can contribute to a wide range of health complications and high CO2 levels (>1000ppm) can impair normal cognitive function, so it is useful to be able to monitor them.
Connecting the CJMCU811 to an Arduino Connecting the KY1602 to an Arduino and a 1602 LCD
Now, We need to declare the I2C devices and their addresses:
Initialize the I2C devices and turn on lCD backlight in the setup function:
Start serial communication
Check to see if the CJMCU is configured correctly, otherwise display error message:
Starting the void loop function. Check to see if the data from the sensor is available, and if so, read and calculate the results:
Send the data via serial port:
Display the same data on the LCD display:
Add 10ms delay to prevent overloading the I2C bus:
The completed code should look like this:
Step 4 Press the “Upload” button at the top (button with tick, located below “File”). The IDE will now compile the code and upload it to your Arduino (this may take a few moments).
Step 5 To check if everything is working, open the serial monitor from the Arduino IDE (magnifying glass button in the top right corner) and see if you can get a reading. The CJMCU has to be left on for 24 hours before it will give a correct reading. If everything is connected correctly, the LCD should also show readings from the sensor.
Step 6 That’s it! You should now have a fully working air quality sensor. Now all you need to decide is what sort of enclosure you want to put it in. You can look at our high quality boxes HERE for ideas.
PIR sensor module for Arduino and other microcontroller projects
The HCSR501 is a PIR (Passive Infra-Red) sensor that can detect the presence of people by measuring the infrared radiation radiated by the body. It can be used in a vast and diverse number of projects, including but not limited to: automated lighting systems, burglar alarms, automated door systems, etc.
Principle of operation
All objects with a temperature above absolute zero (0 kelvin) emit electromagnetic radiation. The higher the temperature of the object, the smaller the wavelength of the radiation emitted. The normal human body temperature is 37°C (310.2 kelvin) and it therefore emitts infrared radiation (mostly at a wavelength of 12µm). The PIR sensor can sense when a person has walked into its field of view by measuring the difference in the infrared radiation received from the ambient environment and the human body.
Voltage : 5-20VDC
Power Consumption: 64mA
Logic output: 3.3V
Range: 7 metres, (<120°)
Lock Time: 200 miliseconds
Operating temperature range: between -15°C and 70°C