mikeaj
Headphoneus Supremus
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- Jan 10, 2010
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The thing that plugs into the wall is just a simple AC/AC transformer, as opposed to some kind of AC/DC regulated power supply. There are parts in the board for a dual half-wave rectification: it uses the positive side of the AC cycle to create the positive DC rail, and the negative side of the AC cycle to create the negative DC rail. Voltage regulators (7912 and 7812), filter caps, etc. all are on the board.
With the parts as specified (unless with low line voltage from wall, using the recommended cheapest option wall wart with the relatively low output, and maxing out the output power into low impedance loads), the ripple into the regulators will be small enough that they can take care of most everything.
With the parts as specified (unless with low line voltage from wall, using the recommended cheapest option wall wart with the relatively low output, and maxing out the output power into low impedance loads), the ripple into the regulators will be small enough that they can take care of most everything.