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STM32 Nucleo-144 review

STM32 Nucleo-144 Review

1 Introducing new Nucleo-144

The STM32 Nucleo-144 is a new series of development board by STMicroelectronics. It is the third announced series titled Nucleo. Each Nucleo-144 share the same pin map for each board and features a new connector named ST ZIO which is compatible with Arduino Uno Rev3 connector.

This new series takes his name from the number of pads exhibit by its different MCUs which are all a LQFP144 package. Indeed, the STM32 Nucleo is currently available in 5 configurations we will discuss later. continue reading…

An object counter using an IR sensor and Arduino

An object counter using an IR sensor and Arduino

1 About

A counter system
Fig.1 – Example of a counter system.

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 for:

  • counting people traversing a certain passage or entrance. For example, in commercial buildings there are gates which control user access or presence often used to optimize energy consumption;
  • counting objects or merchandise in industrial sector;
  • etc.

A counter can be made not only with IR technology but also with thermal imaging systems that use an array of sensors which detect heat sources or using machine vision which usually requires complex image processing algorithms. continue reading…