Re: [PLUG] Temperature recorder

On Fri, 12 Aug 2022, Rich Shepard wrote: On Thu, 11 Aug 2022, Keith Lofstrom wrote: Maybe not; I presume roasting coffee beans emit a lot of steam, with a crazy-varying specific heat compared to room air. Keith, It's not steam, but smoke. Heavy smoke. Now I use a 3" corrugated hose (the

Re: [PLUG] Temperature recorder

On Fri, 12 Aug 2022, benjamin knutson wrote: I think you could just use an arduino or pi pico(which are usually in stock and can have Wi-Fi). They have data logger shields where you can add an sd card or if you use esp32 or pico w you can always log to somewhere else. Thanks, Benjamin. Rich

Re: [PLUG] Temperature recorder

I think you could just use an arduino or pi pico(which are usually in stock and can have Wi-Fi). They have data logger shields where you can add an sd card or if you use esp32 or pico w you can always log to somewhere else. On Thu, Aug 11, 2022 at 4:59 PM Rich Shepard wrote: > I've no

Re: [PLUG] Temperature recorder [RESOLVED]

On Thu, 11 Aug 2022, Rich Shepard wrote: I've no experience with SBCs while many here have such experience. I want to build a small temperature recorder that takes input from a thermocouple probe, converts the changes to temperature (F and C), and writes the time (from start) and temperature to

Re: [PLUG] Temperature recorder

On Thu, 11 Aug 2022, Keith Lofstrom wrote: Maybe not; I presume roasting coffee beans emit a lot of steam, with a crazy-varying specific heat compared to room air. Keith, It's not steam, but smoke. Heavy smoke. Now I use a 3" corrugated hose (the type used for clothes dryer exhaust) through

Re: [PLUG] Temperature recorder

On Thu, Aug 11, 2022 at 01:59:18PM -0700, Rich Shepard wrote: > There are inexpensive units that do this but the maximum temperature is > limited to about 150F, and I need a range to 500F. As a cheap wildass alternative, can you use a second controllable fan to mix room air with your roasting

Re: [PLUG] Temperature recorder

If you can locate the laptop within 5 meters of USB cable run from the microcontroller, then you can get immediate information over USB from the microcontroller, and potentially control the process, using something easy to develop on. For example, you could program the microcontroller to measure

Re: [PLUG] Temperature recorder

On Thu, 11 Aug 2022, Tomas Kuchta wrote: I hope that I am not distracting from the HW. With my question. Tomas, Nah. How do you plan to implement temperature control loop? You intend to control the temperature, correct? I am asking because - What would be the point of measuring

Re: [PLUG] Temperature recorder

On Thu, Aug 11, 2022, 19:01 Rich Shepard wrote: > On Thu, 11 Aug 2022, Russell Senior wrote: > > > How often do you roast, and can you afford to dedicate a laptop to the > > process during roasting times? > > Russell, > > Generally once per week. Yes, I can put my laptop on the stove top (it's >

Re: [PLUG] Temperature recorder

On Thu, 11 Aug 2022, Russell Senior wrote: How often do you roast, and can you afford to dedicate a laptop to the process during roasting times? Russell, Generally once per week. Yes, I can put my laptop on the stove top (it's off) when I'm roasting. Would this allow an Ethernet or USB

Re: [PLUG] Temperature recorder

On Thu, 11 Aug 2022, Russell Senior wrote: A raspberry pi zero w can do wifi. Or an ESP32 or ESP8266 as well. Programming the microcontrollers is likely to be more challenging for novices. requiring an investment of time learning how to make your stuff work. Russell, Then I'll buy a

Re: [PLUG] Temperature recorder

How often do you roast, and can you afford to dedicate a laptop to the process during roasting times? On Thu, Aug 11, 2022 at 3:17 PM Rich Shepard wrote: > > On Thu, 11 Aug 2022, Russell Senior wrote: > > > I'd recommend not messing with local storage, but immediately forward > > it to a real

Re: [PLUG] Temperature recorder

A raspberry pi zero w can do wifi. Or an ESP32 or ESP8266 as well. Programming the microcontrollers is likely to be more challenging for novices. requiring an investment of time learning how to make your stuff work. On Thu, Aug 11, 2022 at 3:17 PM Rich Shepard wrote: > > On Thu, 11 Aug 2022,

Re: [PLUG] Temperature recorder

On Thu, 11 Aug 2022, Rich Shepard wrote: This page says they have 63 in stock. Oops! Rich

Re: [PLUG] Temperature recorder

On Thu, 11 Aug 2022, Bill Barry wrote: If you want to sample the temperature that quickly make sure you get a very tiny thermocouple otherwise its mass will keep it from responding on 1 second time scales. Bill, My research (not terribly extensive) finds web sites that relate to commercial

Re: [PLUG] Temperature recorder

On Thu, 11 Aug 2022, Russell Senior wrote: I'd recommend not messing with local storage, but immediately forward it to a real computer, either over USB or a network, if you possibly can. Okay. Wireless would be needed because the roaster is in the kitchen and computers are in my office. Rich

Re: [PLUG] Temperature recorder

On Thu, 11 Aug 2022, Russell Senior wrote: This sensor might do the trick: https://www.adafruit.com/product/3984 Russell, Well! I missed that one. Its range is -50°C to 280°C. Connected to this: https://www.adafruit.com/product/3648 (out of stock!) This page says they have 63 in stock.

Re: [PLUG] Temperature recorder

I'd recommend not messing with local storage, but immediately forward it to a real computer, either over USB or a network, if you possibly can. On Thu, Aug 11, 2022 at 3:06 PM Rich Shepard wrote: > > On Thu, 11 Aug 2022, Russell Senior wrote: > > > The worldwide supply of raspberry pi's

Re: [PLUG] Temperature recorder

On Thu, 11 Aug 2022, Russell Senior wrote: The worldwide supply of raspberry pi's available through ordinary retail channels is zero right now (or was the last I looked). But they'd be a good choice. Russell, Huh! Part of the computer chip shortage? The missing information is "how far away

Re: [PLUG] Temperature recorder

This sensor might do the trick: https://www.adafruit.com/product/3984 Connected to this: https://www.adafruit.com/product/3648 (out of stock!) Connected over SPI to a microcontroller or a RasPi. On Thu, Aug 11, 2022 at 2:50 PM Russell Senior wrote: > > Oops, lol. Try again. > > On Thu, Aug 11,

Re: [PLUG] Temperature recorder

On Thu, Aug 11, 2022 at 3:59 PM Rich Shepard wrote: > > I've no experience with SBCs while many here have such experience. I want to > build a small temperature recorder that takes input from a thermocouple > probe, converts the changes to temperature (F and C), and writes the time > (from start)

Re: [PLUG] Temperature recorder

Oops, lol. Try again. On Thu, Aug 11, 2022 at 2:44 PM Russell Senior wrote: > > On Thu, Aug 11, 2022 at 1:59 PM Rich Shepard wrote: > > > > I've no experience with SBCs while many here have such experience. I want to > > build a small temperature recorder that takes input from a thermocouple >

Re: [PLUG] Temperature recorder

On Thu, Aug 11, 2022 at 1:59 PM Rich Shepard wrote: > > I've no experience with SBCs while many here have such experience. I want to > build a small temperature recorder that takes input from a thermocouple > probe, converts the changes to temperature (F and C), and writes the time > (from start)

[PLUG] Temperature recorder

I've no experience with SBCs while many here have such experience. I want to build a small temperature recorder that takes input from a thermocouple probe, converts the changes to temperature (F and C), and writes the time (from start) and temperature to a removable storage device. There are