Open Workbench Logic Sniffer case – Part 4 (Finale)

The expansion module finally arrived this morning 🙂 and the glue seems to be mostly set.

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Here is the expansion module lined up next to the OWLS board, now to fit the headers and find a cable.

Luckily I had an old short IDE cable around that works. It over hangs 4 pins either side but it works.

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Here is both board in place in their respective connectors.

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this is it with the case fully done up, the board sits on a slight angle but it is all nice and snug.

 

Now all left to do is hook up the cables and give it a test.

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Here is it hooked up doing some reading of SPI traffic on the Arduino, note that 3 switches have been set on the panel, this is grounding the un-used pins to avoid phantom signals due to floating lines.

I had to mess around and update the firmware to make it recognize the extra 16 channels, the bootloader didn’t work so I had to use a PICKit3 to flash the OWLS’ PIC directly.

 

Below are a couple of captures from the SPI bus reading channel 0 of a MCP3304 with a potentiometer on it.

2

Set to 5V in

3

Set to 0V in

 

That concludes the case project for the logic analyzer, I would say that it was successful and I feel much better using it without having to worry about shorting the board PCB.

I’ll be back with more projects and updates soon.

2 thoughts on “Open Workbench Logic Sniffer case – Part 4 (Finale)

  1. Pingback: Logic Sniffer in a 33.6Kbps modem case - Arduino collector blog

  2. Pingback: Logic Sniffer in a 33.6Kbps modem case | Electronics Infoline

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