Sensors to add to buy page

[jesse]

Lightning: http://www.ebay.com/itm/331309870885
Wind: http://moderndevice.com/product/wind-sensor/
Bill Acceptor
Coin Acceptor

[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).

[hek]

Or we could try receiving DCF77 signal

http://thijs.elenbaas.net/2012/04/arduino-dcf77-radio-clock-receiver-signal/

Other radio clock signals:
http://en.wikipedia.org/wiki/Radio_clock

[Damme]

Or GPS for a very accurate time

[Yveaux]

What's wrong with NTP guys?

[hek]

@Yveaux

Why make it simple when you can build something complicated?

[Yveaux]

@hek

20 Most Useless Inventions Ever Made – 09:04
— PD

[hek]

@Yveaux

A few of those was really good
I must start sticking remotes to my head.

[epierre]

@hek a sensor I'll explain the use later... quite sensible...

http://www.dfrobot.com/wiki/index.php/Analog_Grayscale_Sensor_V2_SKU:DFR0022

[hek]

@epierre said:

I'll explain the use later...

Curious on how this could be useful!

[Yveaux]

@hek said:

Curious on how this could be useful!

I think he got inspired by my YouTube video and wants to create a line-following temperature sensor

[epierre]

@Yveaux haem no... this is my quest of the gas meter reading... this is the cheap, there is the cheapest, and the expensive (raspi+cam+tesseract)...