Let there be light!

FBnil

Ready to Champion the Pyra to the World...
Joined
Dec 14, 2012
Messages
2,805
Location
Yurp
GPS yes (in the 3G models), accelerometers I think I heard being talked about officially, gyro no idea, and compass I've asked for but not heard anything back. Now phones are also getting humidity and temperature sensors and things, but I wouldn't expect it to have any of that.
What do humidity and temperature sensors cost? How do they connect to SoCs? They might cost only a few $ and be easy to connect and use via I2C or something. Position would ideally be on the outside when Pyra is closed and when it's open and it would need a little hole for air to come in. So it seems maybe it could go next to the microphone which has similar requirements.
Yeah, I want that compass too...

The price of a temperature sensor (not the one inside the CPU) is 1.5 dollar Not I2C though. https://www.sparkfun.com/products/10988

The usb variant is much more expensive, but has a very good manual (and you can disconnect the Pandora, but still be able to measure temperature): http://www.yoctopuce.com/EN/products/usb-sensors/yocto-temperature?gclid=CJnNpuy3n70CFWsTwwodZJoASQ
 

_wb_

Microbe
Staff member
Joined
Apr 5, 2012
Messages
5,387
Age
38
Location
Brussels, Belgium
If the Pyra is like the Pandora, you can use the battery temperature sensor if you want to keep track of temperatures. Put your Pandora in a room, start System Info with logging enabled, close the lid and come back one or two days later. Plot your logs and you'll get a nice temperature graph that is quite accurate, because an idle Pandora does not produce enough heat to really disturb the measurements.
 

WizardStan

Mega GP Mania
Joined
May 24, 2008
Messages
16,733
I'm not sure using the battery or the SoC temperature sensor would give a very accurate reading. What is needed is some kind of external temperature sensor, like something behind the LCD. ;)
 

ssokolow

Member
Joined
May 24, 2012
Messages
245
Location
Ontario, Canada
GPS yes (in the 3G models), accelerometers I think I heard being talked about officially, gyro no idea, and compass I've asked for but not heard anything back. Now phones are also getting humidity and temperature sensors and things, but I wouldn't expect it to have any of that.
What do humidity and temperature sensors cost? How do they connect to SoCs? They might cost only a few $ and be easy to connect and use via I2C or something. Position would ideally be on the outside when Pyra is closed and when it's open and it would need a little hole for air to come in. So it seems maybe it could go next to the microphone which has similar requirements.
Yeah, I want that compass too...

The price of a temperature sensor (not the one inside the CPU) is 1.5 dollar Not I2C though. https://www.sparkfun.com/products/10988

The usb variant is much more expensive, but has a very good manual (and you can disconnect the Pandora, but still be able to measure temperature): http://www.yoctopuce.com/EN/products/usb-sensors/yocto-temperature?gclid=CJnNpuy3n70CFWsTwwodZJoASQ
If you're going for something too large to fit inside a Pyra anyway, you might as well get a DHT11 and get temperature and humidity with similar accuracy for under $1.50 including shipping.

(And it's still small enough that you could probably use perfboard, V-USB, a USB-A connector, an ATTiny45 or ATTiny85, and some appropriately-sized heat-shrink tubing to build something cased with the size of a flash drive.)
 
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