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This thread is privately moderated by extremewing, who may elect to delete unwanted replies.
May 12, 2015, 02:45 PM
A different attitude to RC
extremewing's Avatar
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Making more Bluetooth Open Altimeters. Reserve yours now.

I am setting up to make a new batch of BTOA's to be ready some time around May 20th. (were completed with a few still available)

If you are interested in ordering one, please visit to order!

RCG's Bluetooth Open Altimeter (BTOA) thread

When making some BTOA's recently, Google was kind enough to created a video from some footage of the Shapeoko2 + cirQWizard CNC Pick and Place machine in action. Complete with music!

Shapeoko2 + cirQWizard, making BTOA's (0 min 22 sec)

The following two video's are of a batch of twenty BTOA's being pick and placed by my home built machine!
BTOA top side assembly with Shapeoko2 (0 min 53 sec)

BTOA bottom side assembly with Shapeoko2 (0 min 47 sec)
Last edited by extremewing; Jun 19, 2015 at 11:28 AM.
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May 12, 2015, 11:54 PM
Would you mind elaborating as to the size, weight, and range of the device? Seems like a wonderful idea and I am defiantly interested in potentially using it in my gliders, as it would be nice to see my altitude. Thanks and nice work!!

May 13, 2015, 12:15 AM
A different attitude to RC
extremewing's Avatar
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The dimensions are 5/8" X 1 7/8" X 3/8" and it weighs around 8 grams.

Bluetooth range is around 10 to 30 feet. It is designed to only turn on Bluetooth when close to the ground for landing. It then connects to an app on the Android to readout data.

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