The HC-SR04 is used to measure distances by using ultrasonic sounds. It works by sending out a burst of ultrasound and listening for the echo when it bounces off of an object. Here is a picture of the sensor The duration of this second pulse...
Code
The DS18B20 is a temperature sensor that can be used in various simple projects. This part uses the 1 wire bus and you can connect multiple sensors up to your Espruino..
The PCF8574 is an 8 bits I/O port expander that uses the I2C protocol. Using this IC, you can use only the SDA and SCL pins of your Arduino board.
The MLX90614 is a non-contact infrared thermometer with a measurement range from -70 to +380 degree Celsius. Just connect the four leads to your MBed supported device and you will have a accurate thermometer with a resolution of 0.01 and a accuracy of 0.5 degrees, or...
The ADXL345 is a small, thin, low power, 3-axis accelerometer with high resolution (13-bit) measurement at up to ±16g. Digital output data is formatted as 16-bit twos complement and is.
In this example we use the DHT22 (or AM2302) humidity/temperature sensor and the Arduino UNO board to read data and print it out to the serial monitor. The DHT22 is better.
A light-dependent resistor is a light-controlled variable resistor. The resistance of a photoresistor decreases with increasing incident light intensity; in other words, it exhibits photoconductivity. A photoresistor can be applied in light-sensitive detector circuits, and light- and dark-activated switching circuits. A photoresistor is made of...
This is similar to the previous example, this time we will display the time on our LCD. If you are familiar with JavaScript you will recognise some of the code.
These displays were used in old Nokia 5110 cell phones. It is a 84x48 pixel monochrome LCD display and you can use it for graphics, text or bitmaps. To use.
This piece of hardware is the Espruino Pico which is designed to be programmed in Javascript ,the Pico is designed to plug right into you computer's USB type A connector, or a USB extension lead. The Pico has the following feature swhich I found interesting...
Go to the micro:bit web site and follow the hyperlink to Create Code. Choose the Microsoft Block Editor and make a New Project. Look in the Basic section for the.
In this example we will do a simple flashing led project for a stm32f0discovery board, I used Coocox IDE 1.7.8. I did try the newer version and didn't really like the.