Quote:
Originally Posted by craigboez
Can someone who has used the 971 board or something similar like this comment on how accurate and repeatable they are? What would you use them for and where would you avoid using them?
I'm happy to see a DIY version of what can be purchased from WCP.
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We used the ones from WCP (
http://www.wcproducts.net/sensors) all over our robot last year and never had an issue about accuracy or repeatability. I know the chip has a spec somewhere, I will add them if I end up finding them. I remember the spec being within a couple thou, we decided it was good enough for our zeroing needs. We used them for zeroing our arms, range limits on our arm, zeroing our shooter, and sensing state in our shooter (particularly of the pneumatics). We have used them to replace limit switches for sensing position and find them easier to integrate, more robust, and more reliable.
We have used bare sensors in the past (
http://www.adafruit.com/products/158), but have found the status lights on the WCP boards to be immensely valuable (this is why we worked with WCP to bring these to market). We saved probably 10+ hours of debug time (often at the most critical times...) by having those lights on the board.