[Stoves] thermocouple to RS232 conection

[Charlie Sellers]

Lanny,

I may have one extra of these TC to digital devices, that should become obsolete soon (so I need to ditch it) - http://www.dghcorp.com/MERCHANT2/merchant.mv?Screen=CTGY&Store_Code=DO&Category_Code=FCT
I like much more anything that is USB connected, but that is a newer thing (and much cheaper).  Same situation for cheap PWM chips for infinite fan control - that will soon be available for fan speed control too.

This device needs a VDC supply (all chips do) and can accommodate up to 4 separate type K thermocouples (linearized and cold junction compensation, leading to just a few degrees of error...).

I'll trade you this for any simple software you develop for it, particularly anything that does better than one data point per second - not really needed, but more fun; and answers to any sheet metal stove construction questions that I may have (as promised at ETHOS)!

Charlie

p.s. give me your address





Lanny Henson <lannych at bellsouth.net> wrote: Crispin,
For my latest pot module I am using pot with a lid, and I am testing a 
double wall insulated metal cap that seals the airflow through the gap.
To seal the bottom I just sit the unit on the ground.
My new 2 liter pot module, retained heat cooker will hold cooking temps for 
an hour or so, and hold safe temps for a few hours.
If you toss a blanket over it. It cooks and holds longer.
I am testing it with an alcohol top jet soda can stove.
I am looking for a thermometer with RS232 connection so I can plot temp 
charts.
Lanny


----- Original Message ----- 
From: "Crispin Pemberton-Pigott" 
To: "'Discussion of biomass cooking stoves'" 
Sent: Thursday, March 06, 2008 10:59 AM
Subject: Re: [Stoves] Lanny Henson pot insulator


> Dear Lanny
>
> I am following the subject closely.
>
> May I suggest that you make a lid that covers the pot and the vertical
> spaces as well.
>
> This means two lids.  One to cook with and one that will turn it into a
> retained heat cooker.
>
> If you made one lid ordinary (and cheap) it will function as normal.  Then
> make a lid with a 'pot cosy' over it to keep lid-heat in, and make it 
> bigger
> in diameter so it blocks the top of the enclosed finned area. That will
> prevent heat loss by rising are (a chimney effect).
>
> You don't have to seal the bottom because heat rises, not falls.
>
> What do you think?
>
> Regards
> Crispin
>
>
>
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