Since this is a common error people are making, I want to ask this question. I should receive my B II trident kit shortly and I don't want to do trial-and-error on this. What is the procedure to make the difference between 1.2V and 3.3V trident before soldering or connecting them to a power supply?

1) Are they labeled with a sticker or something similar?
2) Measuring one of the resistors?
3) Reading on the chip?
4) Some other way?

Edited by user Sunday, April 24, 2011 12:17:31 PM(UTC)  | Reason: Not specified

They are labelled.

How can I see what the 1.2 V regulator is for ?

Yes you are right . I did but it could be easier to write 1,2 V on the PCB. There is really very much to read. I have done many diy circuits but those from Twisted Pear are more difficult than others or maybee it is only because it is in English ! My patience is not the best.

Each Tridents have individuals plastic bags and on each of those bags there is a label that tells you exactly where it goes on the BII PCB, including orientation like "IN to VD" or something like that.

Also, each Trident PCBs have a sticker with the voltage written on them.

Please double check this and confirm you have the labels.

Hopefully you did not mix all PCBs and resistors together. You need to be able to set the right current to the right Trident PCB with the resistor.

Ciao!

Finding the value of the through hole resistor is not the issue here...I can measure this easy enough with my DDM or the color codes as LenovB mentioned. However since I assumed (wrongly) that all trident PCBs are the same ie have the same component values save the through hole resistor when my sticker fell off and things got mixed up I simply took the 10.5ohm resistor and assumed that it was what made a 1.2v board as the other two are 20ohm resistors. Therefore since there is one 1.2v board and two 3.3v boards ... well I assumed the odd man out gives 1.2v.

Now unfortunately the manual for trident is not up on the site yet nor the schematic so it kinda makes things hard to troubleshoot.

Russ / Brian can you help clear things up for us here?

Best Regards,
Theo

Ok, I must admit I didn't see that one coming. V1.0.5 now mentions the R8 value in case EVERYTHING gets mixed up, plus a few other minor changes.

What Russ is asking you is not to read what is written on the SMD (surface mount) resistor but rather use a DMM (digital multi meter) and probe the resistor at R8 (one probe on each side of the resistor).

BTW, 104 = 100K or if you prefer 10 + 4 zeros which reads 100000 ohms = 100K

So if you see that R8 has writings on it that says 104 it is the 1.2V Trident. Easier to just measure it unless you have good eyes! :)

Ciao!
Do

I'd start by checking all of the soldering, esp. that of R4.

Edited by user Saturday, June 4, 2011 3:03:56 PM(UTC)  | Reason: Not specified