Ok so in order to help some guys that have problems with those clones. Today arrived some of the new ones called rp2040 PLUS
.
The values of the reistors are these :
oled old
point a cmd 47 ohms
point d clk 47 ohms
point c dat0 47 ohms
point b no resistor
oled new
point a cmd 47ohms
point d clk 47 ohms
point c dat0 240 ohms
point b no resistor
v1-v2
point a 50 ohms
point d 50 ohms
point c 330 ohms
point b 50 ohms
lite
point a 50 ohms
point d 50 ohms
point c 240 ohms
point b 50 ohms
instinct-v6
point a 240 ohms
point d 240 ohms
point c 240 ohms
point b 33 kiloohms
From the measurements above we can see:
1) The oled chips dont have resistors at rst point b which i think is good. But we can see that lite and v1-v2 models use 50 ohm resistors at point b which is not recommended.
2) On newer PLUS chips the main difference is the addition of 240 ohm resistors, instead of 47-50 ohms, at c dat0 points.
I dont know if they are influenced from instinct-nx chips which use 240 ohms at all a,d and c points. This also doesnt make a lot of sense since the recommendation is to add 100 ohm resistors at point c dat0.
3)for some reason the v1-v2 clone uses 330 ohms at point c. Even more than 240 ohms which are used at oled and lite rp 2040 clone boards.
First of all check if you have slow emmc errors after the installation. If yes then proceed with the following:
On old oled boards add 2 more 0201 47 ohm resistor at point c and point a as you can see in my picture (or simply replace them with 100 ohm resistors) . First cut the traces and then add the 47 resistors if you dont replace with 100 ohm.
On new oled models replace the 0201 resistors of point a and c with 100 ohm resistors.
On v1-v2 board replace point a and c with 100 ohm 0402 resistors and if it still doesnt work remove the 50ohm point b resistor and bridge the points.
On lite board
replace point a and c with 100 ohm 0201 resistors and if it still doesnt work remove the 50ohm point b resistor and bridge the points.
Maximumbeans
DinohScene
Veho
