>> An LCD would be great. Just point the way. Sounds
>> like a good way to debug something.
>
>It is best to start with a Hitachi 44780 compatible character display.

You can often get these at very reasonable price on eBay. May have a strange
shaped PCB because they are left over from a production run, or from some
defunct manufacturer. Make sure you get a datasheet with it if you go this
route. Searching for "lcd character" found a heap of 44780 ones in ebay.com.

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