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Texrat's Avatar
Texrat is offline Texrat
2007-07-10 , 07:22
Posts: 11,700 | Thanked: 10,045 times | Joined on Jun 2006 @ North Texas, USA
#51
Originally Posted by Kybo_Ren View Post
Alright, sounds good. I ordered two samples, so if at all possible I'd like to try it on a semi-broken or broken one first before I go messing with mine
I have 2 types of broken 770s: no power, and funky screen. Sounds like you need a funky screen.
 
tonydt1g3r is offline tonydt1g3r
2007-07-10 , 19:05
Posts: 17 | Thanked: 0 times | Joined on Jul 2007
#52
1. so when you need to install a new OS it says unplug the 770, does that mean if you wire it up to charge from the USB port its not going to work right?

2. also is the diode really neccessary?
 
Texrat's Avatar
Texrat is offline Texrat
2007-07-10 , 19:33
Posts: 11,700 | Thanked: 10,045 times | Joined on Jun 2006 @ North Texas, USA
#53
Diodes can act to protect a sensitive circuit by ensuring current flows only one way. I think that was the intention in this case.
 
Kybo_Ren is offline Kybo_Ren
2007-07-10 , 22:04
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#54
Originally Posted by Texrat View Post
I have 2 types of broken 770s: no power, and funky screen. Sounds like you need a funky screen.
Yeah that'd work fine

1. so when you need to install a new OS it says unplug the 770, does that mean if you wire it up to charge from the USB port its not going to work right?
It would still work. Why wouldn't it?
Especially if you can switch the host mode and device mode.

2. also is the diode really neccessary?
As Texrat said, a diode ensures current only flows one way.
It would be easy to make an external switch that switches between two sets of diodes, each allowing current to flow different directions. That way you could have a device mode and a host mode (i.e. charge from a USB port mode and power devices mode)
 
ishtob is offline ishtob
2007-07-14 , 15:51
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#55
which direction shoul dbe diode be placed if there is to be one?
 
Kybo_Ren is offline Kybo_Ren
2007-07-15 , 10:22
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#56
Depends on what you want to do. Do you want to charge via USB or use the device as a host?
 
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barry99705 is offline barry99705
2007-07-15 , 22:39
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#57
Originally Posted by Kybo_Ren View Post
Depends on what you want to do. Do you want to charge via USB or use the device as a host?

Yes! Some more stuff to make up for the ten character limit...
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Kybo_Ren is offline Kybo_Ren
2007-07-16 , 02:40
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#58
Lol, if you want to do both, then just use them in opposite polarities
 
ishtob is offline ishtob
2007-07-16 , 08:24
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#59
i just want to charge the 770 by usb, not host usb
 
Kybo_Ren is offline Kybo_Ren
2007-07-16 , 08:45
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#60
Then put the diode in series (+ -> - -> + -> - is series) with the USB power input/battery line circuit.
 
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