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Ceramic Trimmer 6mm diameter 2 to 5pF 200VDC 5mm pitch

Ceramic Trimmer 6mm diameter 3 to 10pF 5mm pitch

Ceramic Trimmer 6mm diameter 4.2 to 20pF 200VDC 5mm pitch

Ceramic Trimmer 6mm diameter 9.8 to 50pF 200VDC 5mm pitch

Chord DM04 Hypercardiod Instriment and Vocal Microphone

High quality dynamic microphone with all-metal, ergonomic construction. Capable of withstanding high sound pressures, for accurate reproduction of vocals and acoustic instruments.

• Hypercardioid response
• On/off slide switch
• Supplied in an ABS case with XLRF to 6.3mm mono jack lead

Frequency response: 50Hz-15kHz
Sensitivity: -74dB  plus/minus 3dB
Impedance: 600 ohms
Connection: XLRM
Dimensions: 180 x 47mm dia

Chord IM07 Precision Vocal & Instrument Dynamic Microphone

Citronic D1000 500W+500W RMS 19" rackmount 1U Power Amplifier 

Citronic D1000 300W+300W RMS 19" rack-mount 1U Power Amplifier 

DM50S Neodymium Dynamic Vocal Microphone

citronic PLX2000 Class H 1000W+1000W RMS in to 2 ohms 19" Rackmount High Power Amplifier 

Citronic PLX2800 Class H 1400W+1400W RMS in to 2 ohms 19" Rackmount High Power Amplifier 

Citronic PLX3600 Class H 1800W+1800W RMS in to 2 ohms 19" Rackmount High Power Amplifier 

Citronic PPX300 150W+150W RMS 19" Rackmount 2U Power Amplifier 

Cardioid USB studio Condenser Microphone

with a gold sputtered diaphragm housed in a precision engineered alloy body and plated steel mesh. Powered by USB with integral FET preamp and A/D converter, delivering accurate digital audio to the USB type B connector.

Plug-and-play, PC and Mac compatible

USB bus powered

Blue LED power on indicator

Supplied with shock mount, USB lead and carrying pouch, Power supply

Current consumption26mA 5VDC (USB)

ConnectorUSB type B

• ElementsBack electret condenser capsule
• Polar pattern Cardioid
• Sensitivity -32dB (0dB = 1V/Pa @ 1kHz)
• SPL input max 140dB (@ 1kHz ?1% THD)
• Frequency response 30Hz - 18kHz
• Signal to Noise Ratio 84dBA
• Sampling Format 16 bit 48KHz
• Dimensions 180 x 50mm

CJMCU7620 Arduino-Compatible Gesture Recognition Sensor

This PAJ7620-based sensor offers a built-in proximity sensor and is capable of detecting 9 various hand gestures (up, down, left, right, forward, backward, clockwise, counterclockwise and waving). The I2C bus makes it easy to interface with a large variety of microcontrollers. 

Voltage: 3.3VDC 

Size: 21x15mm
 

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.
 

Voltage: 3.3VDC 

Size: 21x15mm
 

How Can I use the CJUMCU-811 to test air quality and CO₂ levels?

Here is an example project for an air quality meter using the CJUMCU-811, an Arduino Uno and a 1602 LCD screen with a KY1602 to display CO2 levels and air quality:

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.

Here’s what you will need:
 

Tools
Soldering Iron
Solder
Jumper Leads (male to female)

Components
CJMCU811 x 1
LCD1602B LCD screen x1
Arduino Uno x 1 or Arduino Nano x 1
KY1602 Parallel to Serial converter
 

Libraries

CCS811 Arduino Library

PCF8574 Arduino Library

Step 1
First you will need to assemble the project. The CJMCU should come with a set of pin headers that need to be soldered directly on it and the KY1602 should be soldered directly to the back of the LCD screen. Now, connect everything together using the wiring diagram below for reference.

Connecting the CJMCU811 to an Arduino       Connecting the KY1602 to an Arduino and a 1602 LCD 
CJMCU                           Arduino                     KY1602                          Arduino            LCD
VCC----------------------------3.3V                       VCC-----------------------------5V
GND----------------------------GND                      GND----------------------------GND
SCL------------------------------A5                        SCL-----------------------------A5
SDA-----------------------------A4                         SDA-----------------------------A4
                                                                        Pins 1-16---------------------------------------Pins 1-16*

 *pin 1 on the KY1602 is the one nearest to the 4 data and power pins

Step 2
Connect your Arduino to the PC and install the above Libraries. If you don’t know how to do this, CLICK HERE and follow the “Installing Arduino Libraries” section.

Step 3
We can now create the code to get this all working:

First, delete the code in the IDE window, then include the aforementioned libraries:  

 
    
#include <LCD_I2C.h> 
#include <Wire.h> 
#include "SparkFunCCS811.h" 
    

Now, We need to declare the I2C devices and their addresses:  

 
    
#define CCS811_ADDR 0x5B 
LCD_I2C lcd(0x27, 16, 2); 
CCS811 sensor(CCS811_ADDR); 
    

Initialize the I2C devices and turn on lCD backlight in the setup function:

 
    
void setup() 
{ 
  Wire.begin(); 
  lcd.begin(); 
  lcd.backlight(); 
 
    

Start serial communication  

 
Serial.begin(115200); 
delay(1000);

Check to see if the CJMCU is configured correctly, otherwise display error message:

 
    
if (sensor.begin() == false) 
  { 
  Serial.print("Sensor error. Check connection"); 
  while (1); 
  } 
    

Starting the void loop function. Check to see if the data from the sensor is available, and if so, read and calculate the results:

 
    
if (sensor.dataAvailable()) 
  { 
  sensor.readAlgorithmResults(); 
    

Send the data via serial port:

 
    
Serial.print("CO2["); 
  Serial.print(sensor.getCO2()); 
  Serial.print("] tVOC["); 
  Serial.print(sensor.getTVOC()); 
    

Display the same data on the LCD display:

 
    
lcd.setCursor(0,0); 
lcd.print("Est. CO2 - "); 
  lcd.print(sensor.getCO2()); 
  lcd.setCursot(0,1); 
lcd.print("Tot. VOC - "); 
  lcd.print(sensor.getTVOC()); 
  } 
    

Add 10ms delay to prevent overloading the I2C bus:

 
    
delay(10); 
    

The completed code should look like this:

 
    
/*  
Connecting the CJMCU811 to an Arduino Uno or an Arduino Nano:  
 
CJMCU811       Arduino 
VCC-------------->3V3 
GND-------------->GND 
SCL-------------->A5 
SDA-------------->A4 
*/ 
  
#include <lcd_i2c.h> 
#include <wire.h> 
#include "SparkFunCCS811.h" 
LCD_I2C lcd(0x27, 16, 2); //Address of the KY1602 module 
#define CCS811_ADDR 0x5A //if it doesn't work, change to 0x5B 
 
CCS811 sensor(CCS811_ADDR); 
 
void setup() 
{ 
  Wire.begin(); //Initialize I2C Hardware 
 
  lcd.begin(); // If you are using more I2C devices using the Wire.h library, use lcd.begin(false) 
 
  lcd.backlight(); 
 
  Serial.begin(115200);  //Starting serial communication 
  delay(1000); 
 
   
  if (sensor.begin() == false) 
  { 
  Serial.print("Sensor error. Check connection"); 
  while (1); 
  } 
} 
 
void loop() 
{ 
  if (sensor.dataAvailable())//Check to see if data is ready with .dataAvailable(). if statement checking to see  
  { 
  //If so, have the sensor read and calculate the results. 
  sensor.readAlgorithmResults(); 
   
  Serial.print("CO2["); //Returns estimated CO2 reading 
  Serial.print(sensor.getCO2()); 
  Serial.print("] tVOC[");//Returns calculated total VOC reading 
  Serial.print(sensor.getTVOC()); 
 
  lcd.setCursor(0,0); 
  lcd.print("Est. CO2 - "); 
  lcd.print(sensor.getCO2()); 
  lcd.setCursor(0,1); 
  lcd.print("Tot. VOC - "); 
  lcd.print(sensor.getTVOC()); 
  } 
  delay(10); //Prevents overloading of the I2C bus 
} 
    

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.

Active sound-reinforcement speakers with polypropylene enclosures and built-in class-D amplifier modules. Each cabinet is equipped with an extended frequency main driver and a titanium compression driver for optimum clarity. Power from the internal bi-amplifier is controlled from an internal DSP section, offering pre-set profiles with crossover, EQ and dynamics processing to suit the program material. Custom settings can be created via the onboard rotary encoder and backlit display or by connecting the CLARA unit to a PC or laptop via USB and editing using the free-to-download ADU software application. 2 combo inputs on the rear panel can accept balanced or unbalanced line level audio with 6.3mm jack or XLR connection. An integral Bluetooth® receiver can be paired to a smart phone and audio can be streamed wirelessly through input A. In addition to a line level input for input B, there is a mic/line level switch to enable direct connection of a microphone. Maximum sound impact from a lightweight and easy to manage cabinet.

• DSP speaker management with editing software
• Bluetooth connectivity
• High power class-D bi-amplifier
• High impact PP cabinet with side & top handles
• 35mm pole mount socket

Bright Blue Straw Hat 5mm LED, Clear, 2500mcd

Vf: 3 - 3.2V
Wavelength: 460nm 

Bright Cool White Straw Hat 5mm LED, Clear, 2500mcd

Vf: 3 - 3.2V 

 

Bright Green Straw Hat 5mm LED, Clear, 2500mcd

Vf: 3 - 3.2V 
Wavelength: 515nm

Bright Ice Blue Straw Hat 5mm LED, Clear

Vf: 2.7V 
Wavelength: 490nm

Bright Orange Straw Hat 5mm LED, Clear, 1000mcd

Vf: 2 - 2.2V
Wavelength: 605nm 

Bright Pink Straw Hat 5mm LED, Clear, 2500mcd

Vf: 2 - 2.2V 
Wavelength: 650 - 660nm

Bright Red Straw Hat 5mm LED, Clear, 1000mcd

Vf: 2 - 2.2V 
Wavelength: 620 - 625nm

Bright Ultraviolet Straw Hat 5mm LED, Clear

Vf: 3 - 3.2V
Wavelength: 390nm 

Bright Warm White Straw Hat 5mm LED, Clear, 1600mcd

Vf: 3 - 3.2V 
 

Bright Yellow Straw Hat 5mm LED, Clear, 1000mcd

Vf: 2 - 2.2V 
Wavelength: 588 - 590nm

Opto Coupler. Diode 5V 60mA max. Detector 18V 100mA max. 7KV isolation

Opto Coupler. Emitter 5V 100mA max, Detector 80V 100mA max. 6DIL