Polarization

[marcin11]

Jlc and I are sort of confused about polarization of D2 diode on 4.5 module. PCB had markings K and + on the same site. According to schematics Cathode should be on the right site connecting directly to F1.
The other question is about D1 on controller.
Should pin 1 Anode be on the bottom right connecting to R17?
Thank you for your hard work.

[stuartpittaway]

D2 is a SMBJ5.0A TVS DIODE - data sheet https://datasheet.lcsc.com/szlcsc/1912111437_AnBon-SMBJ5-0A_C440263.pdf

The STRIPE of the DIODE should be pointing to the RIGHT of the module PCB (towards positive).

D1 is a 3 pin device, so no problem with orientation. Do you mean D3 (next to R17) as per the silk screen, the positive is on the right hand side.

[marcin11]

Thank you for your respond.
2nd part of my question referred to D1 on the controller board

[stuartpittaway]

Ok, pin 1 aligns with the marking for pin 1 on the silkscreen. D6 is unpopulated (as it should be).

[marcin11]

Thank you. Please excuse my ignorance. There is 8 or 10 versions of ATTINY1624 XF, SSU,SSF ... are they interchangeable?

[stuartpittaway]

They all have differences, but as long as it has the same 14 pin layout it should be fine