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Re: Power Comms 1.3 Voltage Tolerances? - 16 years ago
Oh and the power supply is a nice Antec Basiq 500W ATX, reads the following voltages on the four-pin Molex connected to the board: ground (black) to +12V (yellow): 11.V ground to +5V (red): 5.32V So it's likely not a power supply issue.by Ithacacian - Controllers
Re: Power Comms 1.3 Voltage Tolerances? - 16 years ago
Here's the power comms board with the power on, no serial cable attached, Rx and Tx shorted. The aforementioned voltage levels apply for the state the board is in in this picture. Sorry for the VGA quality.by Ithacacian - Controllers
Re: Power Comms 1.3 Voltage Tolerances? - 16 years ago
Also, intermittently dmesg | grep tty will give me that I have a connection, but as soon as I ping it for anything and come back, I get this when I recheck my connections: stephen@stephen-desktop:~$ dmesg | grep tty [52913.424167] usb 1-1: FTDI USB Serial Device converter now attached to ttyUSB0 [52915.891787] usb 1-1: usbfs: interface 0 claimed by ftdi_sio while 'brltty' sets config #1 [52915.9by Ithacacian - Controllers
Re: Power Comms 1.3 Voltage Tolerances? - 16 years ago
I did indeed have Rx and Tx shorted, though I shorted both ground (left on both?) and signal (right on both?). In trying to establish whether this is me being stupid on minicom, or if its rather a board error, I present to you the minicom option screen. What Ive done is 'O,' configure minicom, where I've set the serial port to /dev/tty/USB0, and adjusted the baud rate. After that, sometimesby Ithacacian - Controllers
Power Comms 1.3 Voltage Tolerances? - 16 years ago
Hello again, I have a question regarding the tolerances for the pin to pin measurements in the Power Comms 1.3 board. I have made the following measurements: With power and usb->serial connected: 15 to 16: 5.03V (fine) 15 to 14: -6.82V (a little low, but within 10% of lower range of -7 to -12) 15 to 13: -5.63V (problematic) 15 to 12: 5.03V (fine) 15 to 11: 5.03V (little high) With jusby Ithacacian - Controllers
Re: PCB v1.3.0. problems - 16 years ago
Hey, As someone else putting together the electronics for the first time, I had the same problem. The disconnect in the documentation is that for the initial power test, the MAX232 chip is out, then you put it in for the communications test, then if you have problems (as I did, on account of minicom, but I assumed it was a problem with my soldering), go to the debugging. The voltage tests betwby Ithacacian - Controllers
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