ISpindel: Difference between revisions

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* Order more parts (Einnor + Justa)
* Order more parts (Einnor + Justa)
* Test whole setup on a breadboard
* Test whole setup on a breadboard
* Add gravity scale to firmware (einnor)
* possibly fork firmware repo or create a pull request (einnor)
* <s>setup a mailing list! 😁 (Justa)</s> Done: beernerds@lists.techinc.nl
* <s>setup a mailing list! 😁 (Justa)</s> Done: beernerds@lists.techinc.nl



Revision as of 21:54, 22 June 2022

Projects
Participants
Skills soldering, brewing, PCB Design
Status Active
Niche FoodHacks
Purpose Fun

iSpindel

iSpindel DIY continuous hydrometer, for measuring the realitive gravity / density of wort. Meant as an educational project for KWBG. We created footprint for the various parts on the PCB. These can be found in the /libs dir in the repo. Furthermore we replaced the reset switch with a reed switch so you can use a magnet to reset the iSpindel without opening the container.

Why Bat43???

It seems to me that the selection of the diode to be a schottky is a critical one here! According to the datasheet, the min. Input Low Voltage must be < 0.25×VIO while the Output Low Voltage is up to 0.1×VIO. Therefore, this leaves 500mV where the BAT43 will drop around 300mV or more. So a regular silicium diode will fail in this setup! Using a BAT43 or better is a requirement so to speak.

found here [iSpindel/issue/59]

Previous work:

Look also here: github.com/techinc/ispindel_kicad

Subpage Dutch user documentation for setting up iSpindel with dataservices

Handy Formulas

Following formulas can be used to convert Gravity values from degrees P to SG and vice versa. Plan is to use this in the firmware to decide on what value to send based on a config variable same as is possible for temperature.

  • degrees P = 259-(259/SG)
  • SG = 259/(259-degrees P)

TODO-List:

  • Cleaned PCB repo (first version: Einnor)
  • Pannelization test (Einnor)
  • Reed-switch test/rework (Einnor)
  • Footprint Battery Holder with sliding pads (Einnor)
  • Footprint D1-Mini 8-pin version (justa) Done by Einnor
  • Petling bottles order (justa) Done, 20220608. 10 pieces
  • Online-service (ubidots?) uitzoeken/selecteren (sikkepitje)
  • Order more parts (Einnor + Justa)
  • Test whole setup on a breadboard
  • Add gravity scale to firmware (einnor)
  • possibly fork firmware repo or create a pull request (einnor)
  • setup a mailing list! 😁 (Justa) Done: beernerds@lists.techinc.nl


Ordered stuff

Arrived

  • 10 Petling's (justa)
  • 2 GY521 Gyro's (justa)
  • 1 TP4051 (justa)
  • 1 Wemos D1-Mini (justa)
  • 2 Battery-holders (justa)
  • 5 pcb's (einnor)

In progress

  • PCB's (einnor)
  • 20 BAT43's (justa)
  • 2 SMD-reed-switches (justa)

Iterations