[sdiy] couple of (beginner) questions

[Keith Winstanley]

In-Reply-To: <001501c08a3a$d5eeb0e0$85f31b3e at nils>
> I know that I need a tempco to get rid of the ambient temperature drift.
> However, the only temperature sensitive resistors I am aware of are NTC and
> PTC resistors.. I searched my favorite web-shops for a thing called "tempco"
> but found nothing. (as I'm typing this I strongly feel like I'm starting a
> new variant of the famous "I searched for the any key, but didn't found it
> on my keyboard" joke right now..).
> 
> Where can I get a tempco? Or is it just a synonym for PTC? (don't think so
> because PTC's and NTC's are not linear)

Hi Nils


Try Farnell in the UK
I have the 2000 catalogue Vol 2 p318
www.farnell.com

I have a packet here of the PTC types here:


For the 9mW/degC
732-278     1K
732-280     10K


For the 5mW/degC
732-291     1K
732-308     5.1K


I use the 732-278     1K

Hope this helps



Keith

http://home.freeuk.net/lowpass