Sensors to add to buy page

jesse

Powered GSM cell phone signal detector: http://www.ebay.com/itm/390851034766
Unpowered GSM cell phone signal detector: http://www.ebay.com/itm/GSM-Signal-Electromagnetic-Radiation-Sensitive-Detector-Electronics-DIY-Parts-/400710053337?pt=LH_DefaultDomain_0&hash=item5d4c2e2dd9

jesse

Digitally tuned FM receiver: http://www.ebay.com/itm/Hot-Sales-New-TEA5767-Philips-Programmable-Low-power-FM-Stereo-Radio-Module-RY-/310964644633?pt=LH_DefaultDomain_0&hash=item4866efeb19

hek

@jesse said:

http://www.ebay.com/itm/390851034766

Thanks @Jesse. The lightning sensor will definitely be added.

The FM radio also if there is a way to pick up RDS data. Do you know if it is possible?

Zeph

@hek said:

The FM radio also if there is a way to pick up RDS data. Do you know if it is possible?

The TEA5767 doesn't have RDS onboard.

One could add a SAA6588 per http://www.rockbox.org/wiki/pub/Main/DataSheets/application_note_tea5767-8.pdf

Possible Alternatives to consider:
Si4703 http://www.ebay.com/itm/221463938377
FM2011 http://www.ebay.com/itm/261217969109

There's an interesting paper about using RDS as an accurate timebase, with the TEA5764HN chip, tho I don't know where to get a module with that chip:
http://www.cse.msu.edu/~glxing/docs/rds-li.pdf

hek

@Zeph :

Yes, Time and Traffic Jam warning system would be cool.

Zeph

@hek
I don't know about the traffic jam thing - do you have any reference? I'm wondering if that's based on low power radios along the highway reporting local conditions, vs wide area FM broadcast RDS. If it's the former, you might have to drive your sensors around to get local traffic jam info from various places (or live next to the highway that matters). :-) But I'm only guessing.

As for time, according to the paper linked at the bottom of my last msg, RDS content can include real time info with about 100ms accuracy - and the paper itself was about a method of getting more precise incremental timing from the RDS packet timing (there's an IRQ on that chip at the end of a RDS packet and apparently they found the timing on that to be precise).