As by request from others members, I will explain how to build a DC/DC for the WD TV Live.
I will not tell everything, not because I want some secret for myself, but I believe that it’s more interesting if you search by yourself.
So, you need:
• A soldering iron
• A multi-meter
• Some basic tools (screwdrivers, a good knife, etc.)
• Some basic knowledge of electronic (ohm law, V, A, R)
2 batteries 12V 4,5Ah in series = 24V (you will need to understand why, but you will).You can use a battery car, but I think it’s not very practical at home
A small box (aluminum) for electronic devices.
A 12V voltage regulator 1,0A (1,5A max)(where, if you read the regulator datasheet completely you will understand why you need 2 batteries and why 24V)
A heat sink for the regulator
Electrolytic – More than 4700 uF (16V or more) for the input caps and no more than 600 uF (16V or more) for the out caps – Tip: more caps in parallel the better. Why?
Ceramic - several, max 1,0 uF – min 0,01 uF Tip: more caps in parallel the better. Why?
2 or 3 resistors (be careful with the power dissipation needed) - they are needed to achieve a nearly exact 12V ( I have 11,98V, normally)
A plate for the assembling.
Some wire (capable of 2,5A) and a switch (on/off)
Then, try to find online how is a Typical AC/DC 12V power supply and replace the transformer and the triode bridge by the batteries.
A tip: I use the LM7812CK voltage regulator (any brand) (I’m telling almost everything…again, read the regulator datasheet device)
I know I’m not telling how to do it but I promise that, for those who still have difficulties, the next tread I will publish the schematic diagram.
Regards and good investigation.