7-segments Display

A seven-segment display (SSD), or seven-segment indicator, is a form of electronic display device for displaying decimal numerals that is an alternative to the more complex dot matrix displays. Seven-segment displays are widely used in digital clocks, electronic meters, basic calculators, and other electronic devices that display numerical information.

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An object counter using an IR sensor and Arduino

An object counter using an IR sensor and Arduino
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In this article we will resume the topic started with in “Detecting obstacle with IR Sensor and Arduino”. More in details, we are going to use the IR sensor like an objects counter.

The counter application is often used continue reading...

7-segment display and STM32 using ChibiOS

7-segment display and STM32 using ChibiOS

We have already introduced MAX7219 in STM32, ChibiOS and a 8×8 LED Matrix, so we are going to jump directly to code section. For convenience we just report link to documentation:

MAX7219 Datasheet

Note that even if pins are arranged in a different way, pin-out remains the same of the 8×8 LED matrix.

In this demo we are going to use Code-B decode to write with ease some number on our 8 digit 7-segment display.

In the demo shown in the video above we set up MAX7219 as normal operation mode, Code-B decode mode for each digit, scanning the whole display with the maximum continue reading...