NA v1.1.4

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 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 the version of the board without the wiring and with minimal wiring (missing the cross connects). Here is an XCF formatted copy of the board layout with all the wiring on different layers. Open it in The GIMP and you can then selectively hide or show layers to see how the wiring works.

Board Layout preview using the PADS-4 prototyping board. All the wiring... It's a mess, you really need to see the layered version to be able to follow the wiring.
Board Layout preview using the PADS-4 prototyping board. Minimal wiring, no cross-connects.
Board Layout preview using the PADS-4 prototyping board. In progress build pics - top view.
Board Layout preview using the PADS-4 prototyping board. In progress build pics - bottom view.

 

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