jana-marie / temperature-logger Goto Github PK

First of all, thanks for sharing this project. I have had a similar need of logging a couple of thermocouple channels, but so far, not enough of a need to design something like this myself.

When reviewing the board before ordering it I noticed a couple of DRC violations- most of them are harmless, but two did catch my attention:

1. Pin 35 of U3 (GND) is not connected- probably a later routing change made it an island.
2. Net NTC_BOARD is connected to pin 29 of U3 in PCB layout, but in schematic it's connected to pin 18.

I'd submit a PR for item #1, but I also squeezed the width of the board a bit to get below 100mm threshold, so that JLCPCB doesn't apply large board engineering fee.

Starting this issue to collect some notes regarding the project documentation. This may be an ongoing issue, or (depending on how it develops) be done at some point.

• add BOM viewing link http://htmlpreview.github.io/?https://github.com/Jana-Marie/temperature-logger/blob/main/bom/ibom.html to be able to directly view the latest version of the interactive BOM

Having thought about the temperature logger for a bit, I feel that a small addition would improve performance:

• 5mm thick metal base plate bonded to the PCB with thermal adhesive tape
• self-adhesive magnet foil (1.5-2mm thick)

This would make the unit bulkier and nice and heavy, but improve performance, stop it from sliding around on the desk, and one could stick it to metal enclosures, rack frames etc.

First draft with tapped corner holes and a whole lot of blind holes accommodating the THTs:

To DIY this, 50x5 bar stock might be flat enough. In principle one could just get a quote from JLCPCB or such, but for a one-off it's probably better to 3D print a center punch template with a thru-hole for each hole center.

base_plate.pdf
temperature-logger_base_plate.zip

If anyone is interested, I can open a PR with the FreeCAD project and exports.

This is a really awesome device and have a need for it in my lab right now. any chance someone could add support into Sigrok for this device, it would be a nice fit for that ecosystem.

https://sigrok.org/wiki/Developers