How/where to connect hall filament width sensor on octopus v1.1

General Discussion
1

Hi,
got the octopus v1.1.

now I have recreated the hall filament width sensor(link to hall filament width sensor) and would like to connect it.
unfortunately I can’t find anything to which pins I have to/can connect it.

does anyone have an idea?

Kind regards
markus

2

This will require a bit of research on your side and also depends on the rest of the hardware you are using.
Assuming that you have a sensor with two hall sensors, then you need two ADC capable pins.

Get:

OR

  • Get the datasheet depending on your chip
  • Page 44 / 47 and following lists the available pins on your boards MCU
  • “Additional function” column will give you an indication if a pin is ADC capable or not

Get: BIGTREETECH-OCTOPUS-V1.0/Hardware at master · bigtreetech/BIGTREETECH-OCTOPUS-V1.0 · GitHub the pin out or the schematic file (which you like better)

  • Find pins that are not used by your hardware and have ADC capability

Example:
Pins PA4, PA5 and PA6 on EXP2 are ADC capable

3

that worked straight away

Thanks for your help

1 Like
4

@seebaer1976 that mod requires two analog inputs with no components connected to them, so the unused thermistor inputs may not work due to the components on them, but I would bench-test them first.

All four have the same circuit setup.

IMG_8518
IMG_85181561×614 74.9 KB

To calibrate this sensor I would recommend getting piano wire size above and below 1.75mm the same amount. Example: 1.7 & 1.8 or 1.6 & 1.9

CC: @Sineos

5

@seebaer1976
I have been interested in this mod, what did you end up connecting them to on your Octopus and what version do you have?
F407, F429, F446, H723

6

I have the 446 and i used 2 pins from exp2. PA5 and PA4 since im not using the mini12865 and im using klipper screen and the other 2 pins went to the POWER DETEC 3.3v and Ground pins.