Hey guys:
I'm trying to build a simple little serial to USB adapter. I'm having difficulty getting it to work though. After building the board I cannot get the PC to detect the adapter.
Here's my schematic. Can anybody see where I went wrong?
Is R1 really a 10 Megohm resistor?
Looks OK to me otherwise. RESET# is left floating in the bus-powered reference designs, but the sheet says it can float or be tied high so that shouldn't matter.
-j
Hi sparkfun have a basic breakout board check out their schematic at
there maybe something there you can use.
cheers
You are focusing on the schematics as the source of your problem and maybe the problem is somewhere else... did you solder correctly all the pins? Can you see any shorting between the pins? Maybe the chip is dead? If you are using breadboard, is your wiring correct?
Figured it out. It was that 10 meg resistor that I didn't need. The schematic I based my design off of had a blank resistor in there and I tried to guess the impedance off an already built arduino I had.
Thanks!
That spot should be occupied by a ferrite bead (or a 0 ohm resistor). See the FTDI datasheet for details.
-j