HSC2011/Hardware: Unterschied zwischen den Versionen

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(more details for buttons, leds, 1-wire and rf modules)
(range tested)
Zeile 20: Zeile 20:
 
The wiring is defined in an eagle file in our yet-to-be-set-up SVN repository.
 
The wiring is defined in an eagle file in our yet-to-be-set-up SVN repository.
  
 +
=== RFM12B ===
  
 +
A little very unprofessional test showed that with the current configuration (through-hole mounted RFM12B with the wire antennae bent to the opposite direction of the pins) with a sender at the whateverlab solder stations a receiver starts losing 6-long packets some steps outside the metalab door front and in the library. Even without further optimization, that should be sufficient for typical class rooms.
  
 
[[Kategorie:HSC2011]]
 
[[Kategorie:HSC2011]]

Version vom 28. März 2011, 16:35 Uhr

Specification

Nodes are supposed to be equipped with:

  • RF transceiver
  • 4 buttons, labelled with digits, letters, colours (probably red / blue / green / yelow) and symbols (playstation style?)
  • a LED for each button in matching colour
  • an RGB LED
  • a buzzer
  • a 1-wire interface for authentication buttons (iButton)

For ease of development, they also get a serial interface.

Implementation

Both for development and for the final version (as far as we know now), an ATMega168 is used; for development, encased in an Arduino, which also binds the RX/TX pins to a USB serial interface.

As an RF module, RFM12B and ZigBee style devices are being considered.

The wiring is defined in an eagle file in our yet-to-be-set-up SVN repository.

RFM12B

A little very unprofessional test showed that with the current configuration (through-hole mounted RFM12B with the wire antennae bent to the opposite direction of the pins) with a sender at the whateverlab solder stations a receiver starts losing 6-long packets some steps outside the metalab door front and in the library. Even without further optimization, that should be sufficient for typical class rooms.