EEZ Bench Box 3 (BB3)

[prasimix]

You can now follow @Jan28's progress with the electronic module in the BB3 EEZ-DIB form factor also on GitHub: https://github.com/fietser28/EL-Load

Fantastic work!

[prasimix]

@goran.mahovlic from Intergalaktik.eu finalized STM32H7 module in CM4 form factor for BB3-CM4 module. Project is now available on GitHub: https://github.com/intergalaktik/bb3-cm4/tree/main/EEZ_BB3_CM4_H7

[Lion_Tamer]

Hi All

I am finally getting round to finishing the assembling of some more modules for my 2nd BB3 and have one that ia throwing an error message, I haven't managed to find a list of the possible error codes and explanations anywhere so thought I would ask on here.

The module in question is a DCP405 R3B3 and the message that I am getting is is "Ch1 IOEXP fault match detected" with a continuous rapid beeping and inability to close the message, this has also sometimes caused the BB3 to enter and exit standby repeatedly even though the power on self checks come back as okay.

Does anyone know what the code set criteria is for this fault code? I assume that it is one or more of the input signals to IC14 that it is moaning about but not sure which one.

For info incase it matters - I am using an R3B3 MCU with firmware V1.7.6

Thank you

Jem

[prasimix]

Check if your PCB has JP2 on bottom side, and if yes then cut it and check once again. Be also sure that I/O Expander IC is soldered correctly.

[Lion_Tamer]

Yes I had JP2 on the bottom - I have another 3 of these modules to complete - will I need to cut it on all of them?
The soldering on the IC looked okay but when I tested between adjacent pins there was a short between pins 1 (~set_DP) and 2 (OE) - must have been a really small whisker as I still couldn't see it at 30x magnification - Looks like my next investment might have to be a microscope.

[prasimix]

You can cut JP2 if you wish, that is RESET line that comes from MCU and in some rare situation could generate instability hence it's removed in the latest revision.

[IanJ]

Hi,

Really like the retractable feet on my BB3 and want to use them on a home made design for something else......where can I get them?

BOM just says:
A-951-A-0-G-0
Adjustable feet (pack of 2) Altinkaya, Turkey

Ian.

[HwAoRrDk]

These?

https://www.altinkaya.eu/shop/a-951-tilt-foot-set-4pcs-set-729#attr=1072

It seems you can buy direct.