$20 Math Coprocessor
![erco](https://forums.parallax.com/uploads/userpics/032/nK79TF2YS9C2I.jpg)
Chips adds floating point math & trig functions for $20, might be interesting. Some other neat things on their site, like free projects and data acquisition modules.
http://www.awce.com/pak12.htm
http://www.awce.com/pak12.htm
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