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1  Using Arduino / LEDs and Multiplexing / Connect ShiftBrite on: March 04, 2011, 12:05:57 pm
A very simple question...
to what pins on arduino I connect a shiftbrite led  ?

What about the power? How Do I supply the led 6-6.5 v?
2  Using Arduino / Sensors / Re: DHT22 Temperature Sensor on: February 28, 2011, 10:03:43 pm
something like this? of course the resistor is not the correct one...but it just an example..
3  Using Arduino / Sensors / DHT22 Temperature Sensor on: February 28, 2011, 07:51:35 pm

I bought a DHT22 sensor ( ) . I got also a library for reading data from here . Can anyone explain me why I need a 4.7kOhm resistor? Is itfor data accuracy and not for hardware?

Anyway if I want to use the resistor btw data pin and Vcc do I just need to make a bridge btw them?

see pic
4  Using Arduino / Project Guidance / Re: Wireless Sensor Network on: January 31, 2011, 06:55:16 pm
Hey P18F4550

does that board you showed on ebay need to be mounted on arduino? how can I attach sensor to it?
5  Using Arduino / Project Guidance / Wireless Sensor Network on: January 26, 2011, 08:50:33 am
Hi ,

I'd like to make a WSN for a university project, well the main focus will be to visualise in a creative/interactive way various environmental parameters. So ideally I would like to place env sensors in various places of my university (indoor and outdoor). I was thinking aorund 30 different locations to make the project interesting. THe problem is to keep the budget very low and the timeline is of 2 months. Do you think is that feasible? What solutions would be available? I've seen Squidbee is no longer there maybe a cheaper way to use a similar technology? Can you maybe advise what should I look for?

Best regards,

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