VerifyNow system teardown follow up

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This is basically an early single-board computer! The two Lattice chips are not north/southbridge chips, they're actually CPLDs (but they are probably implementing northbridge/southbridge). Also in the video about the A340 overhead panel you did the same mistake, you forgot to remove the sticker on the processor chip...

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Google came up with this manual:

Looking up "LHA7127" on google images, I was able to find a photo of the back of the device, which confirmed that your NFT7375B scanner is the same device as LHA7127.

Looking at the manual, the interface seems to be RS232, so if you have one of those cheap RS232 to USB cables for the computer, you can probably make it work. The manual mentions the baud settings etc that you'd need to set up on the computer. I would recommend a terminal app like RealTerm since it's ideal for fine tuning the settings to display data from the scanner. Page 12 of that document (page 6 as labeled in the manual) mentions the pinout, so you could at least try to power it with 5V. The colors of the wires seem to match. Given that the red and purple wires are next to each other, I would assume that purple ("signal ground") is the ground for the red 5V wire. "Frame ground" is likely just that - the ground for the frame of the device. An easy way to verify the ground would be to see which wire the negatives of the capacitors are connected to, or by looking up any of the chips and seeing where their grounds are coming from. The manual also contains test and configuration barcodes that you could try scanning and configure the device for your own application. The device states a max current usage of 220mA, which means that you can use the same USB > RS232 cable to power it with 5V, since it's within allowable USB limit (500mA). The surge current mentioned is likely not a problem. So you would just have to make a custom cable for it and use it as a USB device via a com port. If you don't get any communication, check to make sure that TXD and RXD are not backwards. :) Good luck!

oriole