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Any reason why you cant use the 4.3 on an original Raspberry Pi B?

Just upgraded to a Humphrey's Down East Beast, and while I have been using a Heatermeter for years, I've always been a fan only guy. As the DEB is much better insulated than my UDS, I feel it would perform better with a servo controlled intake damper + fan. Humphrey's come standard with a 2"...

It was indeed the power supply. Once I switched over to the POE unit I've been using for years everything worked as expected. Thank You for the help everyone.

Exactly. I want to use common ground for the blower, that is why I switched to the P-Channel like in HM4.1+ Ahh, I looked at Digikey's summary and Ta in the datasheet. My Bad. I guess I really wanted to know if anyone was running a larger fan with the FQU11P06TU, which you are so I'll try a...

Which stock? The heatermeter before 4.1 uses the FDP7030BL which is rated for 60W . With 4.1 and 4.2, Bryan switched to the P_Channel FQU11P06TU which is rated for 2.5W.

I've been using a 12v 2A wall wart to test during assembly. My main HM ( which has been using this fan for years) is powered my 12v 3a home-brew POE. I'll my new build off the POE and see if that helps. Have you been using your 1.2A blower with your 4.2.3 build?

Which MOSFET are you using? I've been using a BFB1012H (14.4W) with my previous builds, but I was also using the FDP7030BL (HM4.0) which is rated for 60W. With this build, I switched to the P_Channel FQU11P06TU (HM4.1) is rated for 2.5W.

So I'm working on a custom HM based of the HM4.1 design/hardware and ran into a bit of a snag. I have an old 25CFM blower that I want to use that is rated for a max current of 1.2 amps vs the .22 amps of the designated blower. When I attach my blower and 'activate' it by setting an appropriate...

I started out with Bryan's 4.1 Eagle schematic, and deleted the LCD (& driver), Alarm, most of the button circuit, and probably some other items:confused: Next I went part swap crazy, replaced the standard DIL ATMega328p with the TQFP32 package, all the resistors, diodes, and most caps with...

That's one of the many things i love about the Heatermeter's open nature is you can design your own hardware. I just got back some PCBs from OSHPark. I'm working on a headless & SMD design to serve as either a HM or LMRemote.

I see your point. I was thinking more along the lines of each user could compile the firmware images depending on their probe configuration.

One way to do this is to precompile different versions of the firmware, and store them on the the Pi in the firmware folder. Then you can just use the AVR page to upload the correct firmware to the actual Heatermeter depending on your planed usage. I have two .hex files saved which are...

OK, I modified lmreote.ino. Should I use pin 23, 25, 26, and 27? or nix pin 23, and use 25, 26, 27, & 28 for probes? What is BATT on pin 24?

So the wife just bought me a rotisserie, and I'de like to use my temp probes. I was looking through the LMRemote docs, and had a couple of questions: 1. LMRemote.PNG shows only one probe, connected to PC0, and then PC1 has a lead to BATT. What If I want to hook up additonal probes? What Pins do...

I had a similar problem with my initial AD8495 TC board test. Just for yuks, I grounded the braid and everything fell into place. I already had a 1M ohm resistor between TC- and GND on the board, but ok. Now that I have it mounted, it doesn't seem to matter if the braid is grounded or not. I've...

I have a semi working prototype. I threw my back out to such a degree that I couldn't sit or stand at my solder station for the past week, and before that i was waiting on parts. I hope to get back to it this weekend, but the 'honey do' list has grown pretty long, and a happy wife leads to a...

You run the HM board at the smoker, and transmit via wireless serial back to the PI. You lose the benefits of having the HM board connected directly to the PI, but you gain the ability to keep your PI inside, no wires through doors or windows. You still have to supply 12V at the HM, and now have...

Why not just use a wireless rs232 kit, like this one on ebay? That would require no rework of the code, as communication between the HM & Pi is still standard serial communication. You already have the supply voltage at each end.This has the advantage of having the actual HM board at your...

Alan, it's a K and everything tested out ok in the simple stub sketch I wrote to test my AD8495 board. I think Brian nailed it, I was using slot 3 not index 3. that and the reference voltage issue, which is a known entity.

:o Much closer, but still off a bit. I'm going to assume that margin of error is because of my hardware setup; I don't have a 3.3 reference voltage.if (_probeType == PROBETYPE_TC_ANALOG) { float mvScale = Steinhart[3]; if (mvScale == 0.0f) mvScale = 1.0f...