cheap and simple way to measure temperature

[El_AMPo]

When I made my POV propeller clock I was also tempted to include temperature display, besides the time and the calendar. What gave me second thoughts was the fact that the PCB would be spinning all the time, and therefore the temperature being displayed was unlikely to be exactly the ambient.

Are you sure your POV stick, while it is being waved, would also not influence the sensor's readings?

Just a thought...

Anand

Check how old fashion wet bulb hygrometers work,
http://www.agri-shop.co.uk/whirling-hygrometer-37-p.asp
Spinning all around but still the best readings, so no problem with the winding, probably a bad idea because of line noise if you weren't using batteries, but is not the case.

If you want a really CHEAP thermometer with decent accuracy use a diode as a sensor.
Here is the schematic:


Still working for me at a 0.5ºC resolution, but needs a two point slope calibration, some chip math and a pic with ADC.

Maybe the 10bit ADC will give you a resolution of 2-3ºC, maybe less with oversampling with just the 4k7 resistor and the diode directly to the adc.
Anyone for the test of oversampling?
http://www.darreltaylor.com/DT_Analog/