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Last active August 29, 2015 14:04
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Fussball IR system
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fussball-ir.md

Fussball IR system

Inspirations:

Components:

  • IR detectors pair
  • comparator IC for detecting ball pass
  • ATmega uC for detecting edges of digital signal from comparators -> speed calculation
  • Raspberry PI system that will talk to ATmega (via SPI interface), poll for speed/time readouts and send them to Logstash

Hardware:

  • board with ATMega16 (AVR brd I, @16MHz) + DS1307 + STK500 v2 (AVR prog III)
  • LTE4206 (IR diode)
  • BPW85 (NPN phototransistor)

In details

IR detectors + comparators

ATmega uC

Detectors interface

  • Edge-triggered interrupt
  • Clock running for measuring the time of ball passing -> store for SPI polling

SPI slaves

Raspberry PI

Links

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