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I will mount the thermal fuses this weekend, and maybe put the mess in the box. Too many projects. 1) Heater needs to be finished 2) Wifi and RF temp. build starting (see thread) 3) Beer in the bag needs to be finished... still rather good :mug:

The first image is the internals for the Headless, eZ430-RF2500 unit. 1) I am planning on using 4 AAA Batteries 2) Switch Power on switch is mounted on the top of the unit 3) Since I am using eneloop batteries, will have 4.8 volts nominal, so I am throwing in a 3.3 Regulator + cap...

I haven't done this, but looking at the manual, you might be able to use a SPDT switch and switch the W to terminal 5 connection on the PID between the two RTDs When switching a signal, if you have the power on bad things might happen if you disconnect one sensor (let the input float)...

I put the ez430-RF2500 remote sensor in the PVC enclosure and I get approximately 20 feet range to the PC with no change to the PVC enclosure I can always cut holes by the "chip" antenna and use some RF transparent tape... good enough for initial testing. -Joel

The XMEGA-A3BU Xplained is in.... Considering slight redesign, if I go with a ADC TMP35/TMP36 instead of the TMP03 (requires 5 Volts), I can get ride of a separate regulator if we can tolerate 3.3V switching of the Solid State Relays. Also, I think I can power the XBEE WiFi Module without...

Here is the "Headless" version based on the TI MSP430 eZ430-RF2500 and a Analog Devices TMP35 [Not shown is the standoff on the bottom of the probe (I will strap a piece of wood to the probe with a hose clamp). For direct fired setups we need to keep the probe off the bottom, since the TMP35...

Good idea. Thanks. I have yet to pull the plugs and run a wirebrush down the tubes... Typically, I simply fill up the mash tun after I dump the grains and run some PBW through the system... and then flush with clean water... I think you could go with a completely enclosed system, or...

For those who would like wireless temp. Monitoring with little or no custom software/hardware development. I will also show the following build. 1) MSP430 eZ430-RF2500 (Complete RF link to USB with temp demonstration software 2) Analog Devices Low Voltage Temp Sensor. Parts on Order...

I am making sure all of the parts are off the shelf. Only basic tools will be required. The hardest part will be finding a good looking water-proof case. The electronics are on order, should be here soon. Joel

Here is a diagram of the basic system components. I am thinking of adding a XBee Wi-Fi Module so I can monitor the temps on any WiFi Enabled device (iPod, Android etc)... Thoughts? Joel

Thanks. Remaining parts are on order. I will show the wiring of the fuses this week, and the build of the box. Joel

Yes, I could put in a charge circuit for the batteries if it is plugged in to USB. I was thinking USB for the data-logging, but I could throw in a WiFi module, bluetooth or zigbee. The advantage would be no wires!!

I pulled a datasheet from opto22 and I get 3 volt operation draws 2 ma's, if I use 750ma/hr AA batteries (eneloops are 1.9Ahr) The TMP03 draws 1ma, and the processor is the biggest load. I should be able to control multiple 3 hour mash cycles.

You could. I find the English ale is holding up very well, I am a bit surprised. :mug: I will post when I get more information on the single use bags. Joel

Great, I will bring out RS232 or USB (more likely USB)

Here is the vision

I have had some good results with bagging beer for conditioning and serving. I have been documenting the approach here. https://www.homebrewtalk.com/f51/beer-bag-engine-264872/ Joel

This thread is to document the build of a Digital Brew Thermometer. Abstract: I want a digital thermometer which can stand up to the demands of brewing. Features: 1) Stainless steel construction 2) Battery powered and self contained. 3) Should be able to output 5 Volt control...

I am using the following thermal cut-off by the heaters, since I am going to enclose the two tubes in a box. (I am using Mouser.com as the supplier) Per Heating tube. 364 Degree F Thermal Cutoff, 526-NTE8181. Install this on the hot leg of the heater. High temp Heat shring tubing, 4.75mm...

Your welcome. Let me know if you have questions or need more photos. Things to finish up. 1) Add the thermal fuses 2) Build an enclosure 3) Rewire the SSR (Solid State Relay) and PID closer to the enclosure.