TwisterBoard - RxBoard - TxBoard

Introduction

• Main URL: http://ronja.twibright.com/twister2/
• PCB is based of: http://ronja.twibright.com/twister2/pcb.php
• Component list: http://ronja.twibright.com/bom.php?mod=twister2/twister2&type=html1&lang=en

Testing

• Testing Overview: http://ronja.twibright.com/twister2/testing.php
• Twister sanity check - only very basic test.
• Packetloss on wire loopback - this one tests just the cable and switches.

• Bit Error Rate - tests integrity of the whole Twister2
• Packetloss - more crude test that tests the whole Twister2.
• Bit Error Rate of 2 Twister2s - tests whole Twister2, but you need two of them.
• Packetloss of 2 Twister2s - tests whole Twister2, but you need two of them.

Status

Describe the status and potential problems of this component

Board 3-1

• Loopback (powerless) test completed
• Sometimes ping test failing
• Tested OK

Board 3-2

• bad soldering, PCB circuit crack: grap by 4 points of PCB and twist a bit -> FALSE, RvdZ: U68 badly soldered
• bertest failed
• U54-5 output 3V(?)

Board 3-3

• power supply broken
• damaged circuit board
• U51 wrong component

Board 3-4

• U57 broken
• damaged circuit board

Board 3-5

• U52 broken -> Fixed
• When loopback is enabled, then network links dead, U52 port 11 loose -> Fixed
• Loopback plug test completed
• Tested OK

Board 3-6

• solding is done, missing components: 10 nF size 0805 4x / u52 = 74HCT14 1x