Older blog entries for tbenedict (starting at number 0)

I recently gutted an old Microsoft serial mouse and pulled out two discrete ALPS shaft encoders. (All the guts of the mouse were made by ALPS, but I was after the encoders.) They're three-wire devices, and appear to be mechanical contact rotary encoders. Twenty minutes of soldering gave them leads, jacks for plugging them into the Mark III, and away I went.

Using the encoders on the Mark III is dead-simple. the oQEncode object pretty much takes care of everything. You tell it what two I/O pins you're using and it sets up a counter and does the rest.

I haven't put them to use yet (there are some mounting concerns I haven't worked through, and it's apparent there aren't even bushings to keep the shaft concentric with the encoder body) but as far as the controller's concerned they're good to go.

This is one thing I like about the OOPic: It makes scavenging dead-easy since it seems like whatever you plug in can be read, used, and put into service.

Tom

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