Boe-Bot with Spin Stamp

Rayman

So I won this Boe-Bot thing at the Expo...

But, "I'm not going back to Basic", and yes, you can quote me on that!

I already gave the Stamp thing away to Vaati at the Expo...

Anyway, I'm going start by using a SpinStamp (that's been on the shelf about a year now...)
to get it going with the supplied board..

Has anybody else done this?

The datasheed for the SpinStamp says you need a PropClip, but I remember from before that I can just solder on a header and use a PropPlug...

I think I see one typo·in the SpinStamp datasheet that confused me for a second...
It says the VIN->VDD voltage regulator is a LM2937IMP-3.3, but I think it must be something like LM2937IMP-5.0

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My Prop Info&Apps: ·http://www.rayslogic.com/propeller/propeller.htm

Mike Green

Use the Google search: search.parallax.com. There are several "Completed Projects" that have done this (http://forums.parallax.com/showthread.php?p=635533 is one). In the Object Exchange, there is a specialized version of FemtoBasic ("BoeBotBasic") that supports the wheel servos, a PING with servo, IR distance sensors, a compass, and can use an xBee wireless link. The pictures show a Protoboard-based BoeBot, but BoeBotBasic was originally developed using a stock BoeBot with a Spin Stamp substituted for the BS2.

The SpinStamp has a 5V regulator so it can supply regulated 5V just like other Stamps. It also has an internal 3.3V regulator for the Propeller.

Rayman

Hi Mike, I did find your project! I thought you used a cut up protoboard, but if you started with a SpinStamp, then I'll definitely take a look at your stuff...

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My Prop Info&Apps: ·http://www.rayslogic.com/propeller/propeller.htm

Mike Green

Keep in mind that the BoeBot runs on 5V logic and the Spin Stamp runs on 3.3V logic. Although they're not required, I spliced 1K resistors into the servo control leads since the headers for them are directly connected to the Stamp I/O pins. I changed the IR distance detection LED series resistors to work with 3.3V and put 1K series resistors in the signal leads for the IR detector and PING. I don't remember what I used for extra storage. I'm pretty sure it wasn't an SD card since the Spin Stamp doesn't have a 3.3V regulated output and an SD card requires that. You could add a couple of 24C1024B EEPROMs to a pair of I/O pins and run them off 5V. Tracy Allen posted a schematic of a 3.3V to 5V interface here: http://forums.parallax.com/attachment.php?attachmentid=42241. You could tie the 10K pullup to 5V and it would work fine. For xBee, I used Selmaware's AppMod adapter which I don't think is available anymore. The website (www.selmaware.com) does have the documentation and you could build your own version.

Post Edited (Mike Green) : 8/27/2009 2:45:11 PM GMT

Rayman

Thanks Mike. As I recall, you did use an SD card...

PS: If you looke at the SpinStamp datasheet schematic, you'll see both regulators have the same part#... That's what threw me for a second...

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My Prop Info&Apps: ·http://www.rayslogic.com/propeller/propeller.htm