The two analog wheel encoder designs I have been working with don’t have the level of simplicity I was hoping for. As a result I have decided to try an all digital design that makes use of a break beam sensor. The break beam design means developing a move complicated encoder disk but greatly simplifies the electronics.
The core of this design is a Rohm Semiconductor RPI-352 Photointerrupter. In the picture below you can see the physical setup.
The photointerrupter is connected using double sided tape to a piece of perfboard that has been fashioned into an L. The perfboard is connected to the aBot frame. The photointerrupter straddles a plastic disk which has holes punched through it.
The leads from the photointerrupter are then connected to pins 2 and 3 on the boardino.
Over the next couple of weeks I will work on getting the software setup.
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