On 6/25/2011 4:44 PM, V G wrote:
> Hi all,
>
> I'm looking for a relatively cheap (~$10 for humidity sensor, ~$5 or less
> for temperature sensor) for my project.
>
> Right now, I'm looking at the following:
>
> Temperature: DS18B20 (
> http://ca.mouser.com/ProductDetail/Maxim-Integrated-Products/DS18B20+/?qs=
=3DsGAEpiMZZMvbyeSUH4qH%2fLbikZ7SIep9
> )
>
> Humidity: HIH-5031-001 (
> http://ca.mouser.com/ProductDetail/Honeywell-Microswitch/HIH-5031-001/?qs=
=3DsGAEpiMZZMseu6oguAZpqee7rmuRi3v3z4pHD5zNNiU%3d
> )
>
> Requirements:
> - Low voltage (3.3V compatible).
> - Easy to interface (digital bus outputs are nice, such as SPI, I2C, 1wir=
e,
> etc), I don't want to be measuring capacitance or frequency. I can work w=
ith
> linear voltage measurement.
> - Humidity range: 0-100% RH.
> - Temperature range: nothing special, anything standard will most likely =
do.
> - Cost: as mentioned above. I don't want to be spending $40 for a chip.
>
> Can anyone recommend better? Have any experience with a particular produc=
t?
LM34/35
Less than $5.

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*John Ferrell W8CCW*

**

*'A man's feet should be planted in his country, but his eyes should=20
survey the world. '*

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