[AG-TECH] FW: [wearables] wireless accelerometer interest
Ivan R. Judson
judson at mcs.anl.gov
Sun Aug 15 10:54:10 CDT 2004
This is a very cool looking device.
From: owner-wearables at cc.gatech.edu [mailto:owner-wearables at cc.gatech.edu]
On Behalf Of Daniel L. Ashbrook
Sent: Friday, August 13, 2004 7:14 AM
To: wearables at cc.gatech.edu
Subject: [wearables] wireless accelerometer interest
I'm trying to gague interest in the wireless accelerometers our group has
developed. We're investigating a production run of around 100, to be sold
for under $100 each. Here's a variety of information about them, and the
website where more information can be found. If you're interested, please
send me an email with how many you think you'd order when they're available.
If you have a specific project in mind, a short description would be
appreciated as well.
anjiro at cc.gatech.edu
This is a small wireless sensor platform providing a bluetooth SPP
link to three axes of accelerometer data. The accelerometers are
sampled by a PIC microcontroller (onboard ADC) at roughly 100Hz
(rate can be changed via firmware). Data from the ADC conversion is
sent to a remote computer using the PIC's UART in conjunction with a
drop-in bluetooth serial part. Even with two dual-axis
accelerometers onboard there are up to 17 free I/O lines and two
additional ADC channels depending on the device configuration.
Three sockets provide access to all PIC signals. Over-the-air
programming allows for easy firmware updates and rapid prototyping
without the need to have a PIC programmer or special cable.
Schematics, parts lists, and firmware sources are available online.
Quick Feature List
* Bluetooth serial port profile (SPP) for standardized interface
* 3-Axis accelerometer data, 3.9mg resolution (ADXL202JE)
* Reprogrammable PIC (16LF873-04I)
* 17 free I/O lines
* In-Circuit programming connector
* Over-the-air programming via bootloader
* Battery life ~60hrs on 840mAh 3.7v battery, full TX mode
* 13mA @ 3.7v TX mode, 3mA @ 3.7v standby
* Very Simple Firmware
* 35mm X 35mm X 5mm
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