Looking for a kit or circuit design

I need to monitor the water temp of an outdoor wood burner wirelessly.

I bought a Grill Right Wireless BBQ/Oven Thermometer, Oregon AW-131 that worked fairly well, but it had some drawbacks. The transmitter has an 8 hour auto power off. Once it auto powers off, you have to go through a reset procedure to "restart" it. I need to monitor 24-7. Also, it went haywire and started displaying incorrect temp by + 60 deg F.

I would like to build a unit from scratch.
I would like to power the transmitter circuit with a 12 vdc supply,
monitor temps 32°F to 572°F
Transmit wireless up to 100'
build a receiver circuit that would display temp on an LCD display, and power the receiver/ display unit with 3.2vdc

Does anyone know of a kit or a source for a schematic?

Any info appreciated....

Thanks

 

You may not find too many kits. Here is a source for something like what you want, but pricey - http://www.omega.com/ppt/pptsc.asp?ref=UWTC&ttID=UWTC&Nav=

 

Sounds like you'll need a thermocouple for temps that high.

Perhaps the way to start would be to look at some application notes for microcontrollers.
Microchip has a line of uC's that have RF transmit/receive capability.

Here's an app note on simplified thermocouple interfacing with PICs:
http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1824&appnote=en012021

Here's an app note on single supply temp sensing with a Microchip PIC:
http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1824&appnote=en011706

Here's a link to Microchips' wireless offerings:
http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=76

 

Thanks for the help guys... really appreciate that...

Yes, a Thermocouple... probably type J ??

Anyone know where I might get a schematic for a transmitter and a receiver/display circuit that will do the job?

 

The Microchip site has LOTS of datasheets and application notes; and many source code examples.

You will likely find something that is reasonably close to what your needs are that it can be adapted.