problem whit logical level converter

[arogiani]

Hi
i bought your logical level convertor from robo italy :) (the one based on the TXB0108 on their site http://www.robot-italy.com/it/logic-lev ... ional.html)
Right now it's doing bidirectional comunication but it doesn't convert the level.
I connecten on the VCCA side to my 3.3V supplay, the VCCB at my 5.5 V supplay i shourtcuted the gnd and conneted them to the correct pin. Then i shortucude the enable pin to the VCCA and now all chanell on both side are at let's say around 80% of VCCB (2.60V) (channel terminal are not connected), if i force one side of a channel to gnd the other go to gnd as well (and onlyy the cahnnel i force) but it isn0t doing the level conversion. if i disconet the enable all channel go to high inpeadance.
The guy from robo italy told me to ask you for help :)
Thanks a lot
Amos

[adafruit_support_rick]

Please post clear, detailed pictures of your wiring

[arogiani]

I admit is not mmy best of samrtest work of soldering but i check whit the the tester and there is no uintended short and the measure on the pin are as intende apart from the level on the b side when it should give me out high. I connent all the cable that must have fixed values (suppplay, gnd) then i connect the desiderate channel pin whit the 5V, 3.3V or GND (dependign from the side the supplay),finaly i take the measure. i coonect only the pin from one side of the channel ad leave the other not conneted (a part from the multimeter)
Thanks

[adafruit_support_rick]

Are you sure there's no short between B8 and GND?

What voltage do you get on B8 when you put 5V on A8?

[arogiani]

i got the 5V i was suppose to, and i check whit the test for short and found none :)

[adafruit_support_rick]

So it sounds like it's working?

[arogiani]

sorrz i saw onlz the first question :) No it's not working as intended: i will speak for one channel but is replicated on all of them, if nothing is conneted i have a little less than VCCA on both side, if i connecte gnd to one side the other go to gnd, if i connect 5v on B itth b side go to 5 volt and the a side staz to little les then VCCA but if i connct the A side to VCCA the B side staz at litlle less than VCCA and so i can't control sistem that require 5V :(

[adafruit_support_rick]

Hmmm. I don't know. It should work. We can try replacing the converter. Please email [email protected] with a link to this thread for a replacement