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Nicmus
- 19th June 2008, 16:28
Hi all,

Many years ago I was using a Dallas Semiconductor kit, DS1821K, especially design for DS1821 family temperature sensor/ thermostat. I was using it only to program the TH, TL and status registers so I can use the device (DS1821) as a stand alone thermostat.
Unfortunately I lost the HDD with the DEV1821.EXE file and the hardware involved (or part of it).
I still have some other parts of other kits (DS9091K, port adaptors, DS9097 and DS9097E and a fair supply of DS1821 chips).
I would like to make use of them but I no longer have the setup.
A search on Dallas (now Maxim) site left me empty handed.

My humble questions to the forum are:

• Does anyone know where I can find the DEV1821.EXE file to download and some info on the schematic of the hardware?

• Does anyone know if they have for sure an other kit which can, out of box, work with the target device (DS1821) or its newer versions? I prefer to use this particular device because is the only one I know that comes on a 3 pin package and one of the choices is TO220 (easy to mount).

• Does anyone have such kit for sale?

Thank you for your attention!

Nick

Acetronics2
- 19th June 2008, 18:08
Hi,

Just dig into the gold mine ...

ftp://ftp.dalsemi.com/pub/pub/thermal/ds1821.zip

...

Niiiiiiiiice, isn't it ???

Alain

skimask
- 19th June 2008, 18:27
Isn't the DS1821K just a plain ol' standard DS1821 in a different package?
Looks like there's a half a dozen hits here on the forums for it (not to mention a fair number of hits in Google).

Nicmus
- 19th June 2008, 18:39
Alain,

You are a life savior!
Thanks a lot!
I’ll dig some more for the hardware schematic or for the hardware itself.

Skimask,

The DS1821K is a development kit for DS1821 family. The big advantage of the DS1821 family devices (at list for me) is the 3 pin package and especially the TO220 and the fact that once you set a TH, TL and a status bit it becomes a stand alone thermostat. It is true you have only one degree Celsius resolution but for my application is fine.
Regards,

Nick

skimask
- 19th June 2008, 18:46
Skimask,
The DS1821K is a development kit for DS1821 family.
Nick

Ahhh...
I thought it might be the difference between a TO-92, TO-220, DIP-8, or something along those lines.

Nicmus
- 19th June 2008, 18:56
Usually a K at the end of DSxxxx part numbers means a development kit

Nick

skimask
- 19th June 2008, 19:04
Usually a K at the end of DSxxxx part numbers means a development kit
Huh....guess I just never noticed before.
There's my 'learned something new' for the day.

Acetronics2
- 19th June 2008, 20:00
Also see this links ...

http://www.microchipc.com/sourcecode/PIC_Hi-Tech_C_Mike_Pearces_DS1821_thermostat.zip

Alain