I finally got my shipment for keyboard (from Wegener Media) and battery ( From ATC LLC ) replacements for the old MacBook 13''. In addition I changed the HDD for a solid state.
I have to say it ... It runs faster than my almost new MacBook Pro! I should run to CompuUSA to get another solid state for mine!
Here is a good video in case you are in need to replace the keyboard. One of the screws got stripped in my case and I got lucky there was enough room to turn it with pliers.
Wednesday, May 25, 2011
Thursday, December 10, 2009
Multiple Ipod Charger
My task: Provide a Charger that allows to charge multiple IPods at the same time.
Resolution:
1. Use a switching Power Supply 5V/10A to charge 20 IPods (500mA each). The voltage must not go outside the below limits:
2. Use the below diagram to provide a voltage divisor for the D+ and D- pins of the USB (in my case type A) connector
The USB Ipod connector uses 4 cables plus ground shield. They must be connected to the connector as indicated below.
Resolution:
1. Use a switching Power Supply 5V/10A to charge 20 IPods (500mA each). The voltage must not go outside the below limits:
4.9 <= V <= 5.4
2. Use the below diagram to provide a voltage divisor for the D+ and D- pins of the USB (in my case type A) connector
(+) --- 75K --- (D-/D+) --- 51K --- (-)
The USB Ipod connector uses 4 cables plus ground shield. They must be connected to the connector as indicated below.
1 (+) Red
2 (D-) Green
3 (D+) White
4 (-) Black and Ground Shield
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