| Christian |
Hi,
I've gotten an old laptop from work, a HiNote Ultra II made by digital (picture). Only problem is I don't have a wall-adapter (battery charger). So, I can't get it working:(
The power-input is a 3-pin connector(picture), and it reads on the laptop that it needs 11VDC. I have another laptop of the same make but slightly different, with the same power-connector but runs at 16 volt. I don't know how compatible these are, nor the pin-config of the powerinlett.
The battery connecter is a 4 pin connector with tiny pins, so I can't start anything over there :((
Does anybody know anything about how to apply power to this thing?
Best Regards
/Chris |
|
|
| Christian |
| the entire thing |
|
|
| geoffwa |
These days laptops seem to come with two quotes for power usage: one for running, another for charging (the charging one typically being the lower).
If portability isn't a concern, a simple transformer supply will be quite adequate. It doesn't even need to be regulated necessarily, most laptops use additional switch-mode regulators internally to drop the voltage down again, although using a reg simplifies the PSU greatly.
You would to ensure the supply has some over-voltage protection though. |
|
|
| jackinnj |
| the power supply for my old Compaq Presario 1255 died about a year ago. It was a switcher capable of 19 volts, 3 amps -- I replaced it with a linear unit (since I didn't have the time to layout a switcher) and have been using it ever since. The schematic is your basic LM317 adjustable regulator with a PASS transistor on heat sink for enhanced current capacity. I mounted it in a busted PC supply case with the existing fan intact. |
|
|
| joensd |
I once build a "wallwart" for a laptop with a transformer out of the junkbox and a LM2676 (3A Stepdown switcher).
Works really well and wasn´t complicate to layout.
Very few parts as well.
Go to National Semiconductor homepage (for example) and look for a chip that satisfies your needs.
Jens |
|
|
| Christian |
Hey, Thanks for all the replies!
Yeas shure I could build a psu for the the computer, but I don't know the pin-configuration on the power outlet. Maybe I could measure up ground by connecting one test-pin to the chassis of a connector and then the other ohm-meter pin to on of the power-pins.
When I know what ground pin is, I could measure which pin is for charging, and then which pin is for running.
/Chris V |
|
|
|
