Aquarium Lighting

On Sat, 19 Jun 2004 20:05:03 +0000 (UTC), david wrote:

I am reading this now just what I wanted.
always interested in diy pic stuff I measure temp with a thermister but it
is a bit adhock wonder if you can identify your sensors for me sounds much
more reliable

I'm fairly certain they are LM35DZ, and I got them from Farnell.
It's not 100% because that's based on teh fact that I've done it by
checking in my bits box and found a packet claiming to contain 5
"LM35DZ ic-precision temp sensor", and actually containing only one,
and I think I bought a couple of spares for design development.

It might be farnell part number 409-091, and if so I expect a trip to
teh web site will yield a data sheet fairly easily.

I thought about thermistors, but this sensor with its linear output
and an appropriate couple of resistors on an op-amp to scale teh
voltage to a convenient range seemed easier.

regards, Ian SMith
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