TI-H: Problems with BCC serial link


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TI-H: Problems with BCC serial link




Hi, I bought a TI-89 last week and I'm now trying to build a BCC link. My 
TI-89 is HW 2.00 with AMS 1.05. I soldered everything to make the link.. 
there are no apparent shortcuts. But it still doesn't work !
I know my 2.5mm plug is working because I can read 3.12V on the tip and the 
middle. All my diodes are the right way. Now, I'm wondering if the PNP/NPN 
transistors are the right way. Is there a difference between the left and 
right pin or I can use either one ? Is there any special settings to do 
before it works ?

Thanks for helping

Kaven

,
|
| Kaven Rousseau
| omnisync@videotron.ca
| FingerPrint:  F1C8 F915 9F0F DD5E DACB  024B 5C6F 163D F097 40D6
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