ISpindel
| Projects | |
|---|---|
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| |
| Participants | Einnor, Justa, Sikkepitje |
| Skills | soldering, brewing, PCB Design |
| Status | Active |
| Niche | FoodHacks |
| Purpose | Fun |
Contents
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
-
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)
