NA v1.1.4: Difference between revisions

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This version of the Node Assassin hardware implements an 8-bit bus to get the internal port count up high to support 3 channels per node (power button, reset button and power source).  
This version of the Node Assassin hardware implements an independent sense circuit which is to be fed from the nodes power LED line. This is used to verify when a node truly has died. This brings Node Assassin to fully support all of the fence daemon's recommended features.


= Part List =
= Part List =

Revision as of 03:44, 27 March 2010

 Node Assassin :: NA v1.1.4

This version of the Node Assassin hardware implements an independent sense circuit which is to be fed from the nodes power LED line. This is used to verify when a node truly has died. This brings Node Assassin to fully support all of the fence daemon's recommended features.

Part List

Either:

  • 4x Green LEDs (max 10mA)
  • 4x Red LEDs (max 10mA)

OR (harder to find)

  • 4x Bicolour LEDs: 350-1839-ND (Bicolour Red/Green, 2x1 stack, common cathode, max 10mA/colour)

Diagrams

Circuit

Circuit diagram for the four-port Node Assassin v1.1.4.

PADS-4 Layout

This is an "in progress" view of the board. Final layout and wiring are still needed.

Board Layout preview using the PADS-4 prototyping board. Wiring and final layout still to come.

 

Input, advice, complaints and meanderings all welcome!
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