for example, on my windows laptop, there is the plug that goes into the outlet, some wire, a big block of plastic, and then more wire that connects to the charger that goes into the charging port. why is that block there?
it’s ac to dc converter. It a big old dought shape iron with wire wrap around it. this is also why a lot of modern small electronic just have usb charger instead, save money from having to include a transformer and just use dc current from your lap top directly.
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