mattallen37 wrote:I have already made many NXT sensors. I like to post the code and any schematics online for other people (sort of open-source them I guess).
There already is an I2C to UART adapter specifically for the NXT; the HT IR Link. If you need higher speeds or don't want to deal with IR, and if you only need half duplex, you can use the RS485 that's already built into the NXT.
Something I have been thinking about a lot recently is a UART "mux" for the NXT. It would be similar to what you seem to be talking about, but far more advanced. It would ideally have 3-4 UART ports (full-duplex rx and tx), and interface to the NXT using I2C and/or RS485. I actually would have started on this project before now, but I have some other projects I'm working on ATM (other Arduino programs and libraries). I thought I would use an Arduino 2560, because it supports 4 UART ports (rx and tx). I also figured on 128+ byte buffers, to match or exceed that of the NXT's RS485 port, and individually selectable baud rates.
It seems that most people who would take advantage of a serial adapter as you described could just make their own (I've done it a time or two myself).
If you make a good product, I'm sure you could sell it on eBay. I have seen many home-brew mindstorms sensors sell on there. I really don't know how big the market would be though. You'd have to take it slow at first to see how things go.
You also need to remember that in order to sell mindstorms sensors/interfaces, people will want full support for the device in the programming language they are using. That means full drivers for at least 3 programming languages, and maybe more than 5.
In re. to you sig:
mattallen37 wrote:Being able to build (print) cases would be very cool!
An I2C to UART adapter that supports full-duplex and a nice assortment of BAUD rates could be very useful, I just don't know if there would be much of a market.
But I agree with h-g-t, an all-in-one pneumatic supply could be a big hit.
Making custom sensors: What would be the demand?
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