| Main > Main Forum |
| how to hook up u360 to 5 volt power supply |
| << < (5/5) |
| Hogie1418:
--- Quote from: MonMotha on June 30, 2012, 03:06:09 am ---Sounds like you tore a couple pads off the board. Someone who's good at soldering can generally repair it fairly easily, but such a repair is probably out of reach of someone who doesn't have a reasonable degree of practice. --- End quote --- Yep, definately outta my paygrade and I do not know anyone personally who has these skills. Thanks for the advice tho. |
| MonMotha:
--- Quote from: Hogie1418 on June 30, 2012, 03:29:35 am ---Is there any other way to determine that black is truely ground in this situation? I do not have a multimeter at this time (This is why you do not let people borrow your stuff). So at the moment I have no way to check any of that. Is there anything else we can try without this information? --- End quote --- On a typical USB cable, you can be 99% sure that Red is +5V and Black is Ground. There data lines would be white and green. The colors for the wires in the cables are standardized by the USB-IF. In theory, any cable with the USB logo on it should be compliant since it's a requirement to use the trademarked logo. In practice, not all cables that use the logo are actually fully compliant since USB-IF isn't very aggressive with the trademark enforcement. I've never hacked one up that used the standard colors but didn't use them correctly. Worst case, unless they're just plain BACKWARDS, which would be really weird, you shouldn't hurt anything by wiring it up if they're not right. It just won't work. I would recommend using a USB outlet in this case rather than pulling power off a PC HDD connector. The USB outlet should be current limited to ~1A on most PCs, which is a small enough amount of juice that you're unlikely to melt things. The disk drive connectors, OTOH, can supply enough current to melt small PCB traces or wires without kicking the supply's protection in (they're usually good to at least 30A). BTW, if you'd like to send me your board and the connector with a return postage paid box, I'll be happy to attempt a repair. No guarantee of success, but I should be able to test it, and this is well within my normal soldering skill. No guarantees on how long it'll take, though (things have been known to sit on my bench for a couple months). |
| Hogie1418:
So what I am gathering is that since the stick has power then black is ground and red is +5 volt in the usb cable. Otherwise I wouldnt see my u360 with power. So is the power not the issue? Could the problem be the connection between the ipac and u360? Unless insufficient power would cause the two not to comunicate. hmmm --- Quote from: MonMotha on June 30, 2012, 03:56:01 am --- --- Quote from: Hogie1418 on June 30, 2012, 03:29:35 am ---Is there any other way to determine that black is truely ground in this situation? I do not have a multimeter at this time (This is why you do not let people borrow your stuff). So at the moment I have no way to check any of that. Is there anything else we can try without this information? --- End quote --- BTW, if you'd like to send me your board and the connector with a return postage paid box, I'll be happy to attempt a repair. No guarantee of success, but I should be able to test it, and this is well within my normal soldering skill. No guarantees on how long it'll take, though (things have been known to sit on my bench for a couple months). --- End quote --- I may take you up on your offer monmotha, I actually have 2 u 360s and both are busted. I broke the first one and the second one (this one) I was real careful with but it came loose and eventually stopped working as well. It eventually pulled too far away from the pcb. I have since fixed my setup giving the cord extra slack but it was too late for the 2 u360s :-( |
| PL1:
--- Quote from: Hogie1418 on June 30, 2012, 03:29:35 am --- --- Quote from: PL1 on June 30, 2012, 03:00:27 am --- First step: Check the remaining stubs where the port was attached to be sure nothing is shorted across the terminals. Can't quite tell from this picture. --- End quote --- Alright, when you say check to be sure nothing is shorted, how does one determine if it is shorted or not. Again, sorry, totally new to all this. --- End quote --- No problem. I'll try to keep the explanations simple. Visually inspect the torn up traces (silver lines) on the board to make sure they aren't touching each other. If the pins for 5v or ground (pins 1 and 4) are making contact with the other traces, that could cause the voltage to go where it isn't supposed to. (Think BIG plumbing leak causing a drop in water pressure and damaging the house.) Once you get your multimeter back, you can use the Ohms (resistance) setting to check for shorts (accidental connections) and opens. (breaks or disconnects) To see what a short looks like, just touch the meter leads together in Ohms mode and the reading should drop down to 1 or 2 Ohms. To see what an open looks like stop touching the leads together. Checking a cable for shorts (Ohms mode--no power applied) Press one lead to pin 1 and the other to pins 2, 3, and 4 in turn. You should get an open reading on all three. Now move the first lead to pin 2 and the other to pins 3 and 4 in turn. Should be opens. Now move the first lead to pin 3 and the other to pin 4. It should be open. Checking a cable for continuity--the connections you do want to have (Ohms mode--no power applied) With one lead on pin 1 and the other on the red (5v) wire, the meter should read 1 or 2 Ohms. With one lead on pin 4 and the other on the black (ground) wire, the meter should read 1 or 2 Ohms. --- Quote from: Hogie1418 on June 30, 2012, 03:29:35 am --- --- Quote from: PL1 on June 30, 2012, 03:00:27 am --- Second thing to check: Disconnect the USB red and black wires from the U360--with no power applied, of course. Set your multimeter to DC Volts, plug in the hacked USB cable and verify that the red is indeed +5v. Measure with the "-" lead connected to the PC case ground. Next, verify that the black is indeed ground. (0v) Measure with the "-" lead connected to the PC case ground. If both of those are correct, connect red to "+" and black to "-" and you should read +5v. If you want to be absolutely certain, here is a pinout for the USB connector. (Right side, scroll down a bit.) With no power applied, set your multimeter to Ohms and verify that pins 1 and 4 are not shorting to any other pins. --- End quote --- Is there any other way to determine that black is truely ground in this situation? I do not have a multimeter at this time (This is why you do not let people borrow your stuff). So at the moment I have no way to check any of that. Is there anything else we can try without this information? --- End quote --- That is why I have two meters and bought a Harbor Freight $3 meter for a buddy. As the old military saying goes,"Two is one, and one is none. The quick and dirty way to check the voltage is if you have an LED pushbutton (5 or 12v versions will work equally well for this) , you can use the USB wires to light that up. If none are available, try a 3-cell flashlight bulb. (~4.5v) That will tell you in a hurry if there is a voltage on the cable. I'd avoid using a 2-cell flashlight bulb since it is only rated to 3v and would probably burn out very quickly. Same for a regular LED. Once you've verified that you can light the LED/bulb, you can then verify that the colors aren't reversed by using a chunk of wire shorted to the PC case in place of the black wire. (Use this for a quick test ONLY) Scott |
| AndyWarne:
We can easily repair this board or supply a replacement, just drop me an email. Andy@ultimarc.com |
| Navigation |
| Message Index |
| Previous page |