Propellerized Boe-Bot

Whit

Hey Everyone,

I wrote Phil (PhiPi)·about this question and he suggested I post it here (so he can reply and everyone see it!).

I am going to mount a Propeller Proto Board on a Boe-Bot Chassis. I would like to eventually use the Boe-Bot encoder kit as well. Beside the usual 5v to 3.3v connection issue, would there be any other issues (beside the code of course)? Have any of you tried this? Thanks for any help or tips!

I will also have IR detectors,·a Ping))) and mounting bracket, a 2x16 Serial LCD. I am working on learning the Prop (mostly for Robotics) and I thought this might be a way to start on something practical.

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Whit+


"We keep moving forward, opening new doors, and doing new things, because we're curious and curiosity keeps leading us down new paths." - Walt Disney

Post Edited (Whit) : 6/12/2009 3:02:27 PM GMT

Mike Green

Look at BoeBotBasic in the ObEx. It's intended for this configuration plus a compass, without the LCD. There's also a thread in the Completed Projects forum with pictures.

Phil Pilgrim (PhiPi)

The output of the encoder sensor is open-collector. This means the encoder itself can still be powered from +5V, while its output can be pulled up to +3.3V. Here's a schematic:



Remember that this is not a quadrature encoder. This implies that the encoder code needs to communicate with the motor control code, so it knows which direction the wheels are turning. The best option is to put the motor control and encoder code in the same cog.

-Phil

Whit

Thanks Phil and Mike!

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Whit+


"We keep moving forward, opening new doors, and doing new things, because we're curious and curiosity keeps leading us down new paths." - Walt Disney