This is a demonstration of the Photons publish and subscribe features. When the photon publishes an event to the cloud it makes that available to other devices that have subscribe to the event. The other devices is not just limited to other photons but could also be internet connected smart phones ore web browsers.
This is a simple LED clock I prototyped following Simon Monks post. I am using a Particle Photon, a couple 4.7k resistors and a 7 Seg Display with an Adafruit I2C backpack.
Debugging interrupt service routines can be very tricky. It’s not like you can print out variables to the serial port as you might when debugging code outside the interrupt. One way you can can get some idea of what your code is doing in the ISR is to pulse one of the GPIO pins while […]
3×4 Matrix keypad connected to an arduino. Displaying results of key pressed on a 7 segment led display via 74HC595 shift register which reduces the required pins of the 7seg display from 8 to 3.
Here is a shield for Arduino that makes adding quality sound to your products easy. It can play up to 22KHz, 12bit uncompressed audio files of any length.
The LCD Button Shield from Sparkfun Electronics provides a 16×2 LCD screens along with a keypad consisting of 5 keys — select, up, right, down and left. With this shield you will be able to move through menus and make selections straight from one board attached to your Arduino without requiring a massive tower of shields.