Homebrew PCBs

Always learning something new here.
1N4148 + LM741 makes a temperature sensor



On 01/01/2017 07:11 AM, 'David C. Partridge' 
david.partridge@... [Homebrew_PCBs] wrote:
>
> It\u2019s a Vivid IP-330 described as having \u201chot roller\u201d technology.
>
> I need to dig it out as I can\u2019t remember what I did to increase the 
> Temp range (probably just changed a resistor in the op-amp circuit 
> that used a 1N4148 as a Temp sensor).
>
> Can\u2019t find a parts list \u2026
>
> *From:*Homebrew_PCBs@yahoogroups.com 
> [mailto:Homebrew_PCBs@yahoogroups.com]
> *Sent:* 31 December 2016 18:11
> *To:* Homebrew_PCBs@yahoogroups.com
> *Subject:* Re: [Homebrew_PCBs] Re: Temp upgrades of lam's HOW high is 
> high heat conditions
>
> Really? This grabs my attention.
> What make and model?
> Can you take a picture and share?
> Is there an online parts list we can eyeball that shows how concentric 
> heaters are mounted?
>
> On 12/31/2016 11:53 AM, 'David C. Partridge' 
> david.partridge@... <mailto:david.partridge@...> 
> [Homebrew_PCBs] wrote:
>
>     But, but the heaters are concentric with the rollers (or at least
>     they are in my laminator) so
>
>     stopped/forward/reverse should make no difference.
>
>     Dave
>
>