| Subject: | Re: Sound Devices updates the USBPre |
|---|---|
| From: | "Dan Dugan" dandugan_1999 |
| Date: | Fri Sep 17, 2010 8:43 am ((PDT)) |
> I found a YouTube link to a video showing how to build a USB battery. = > They start with a 9-volt alkaline, connect it through a Zener diode > that regulates that down to 5.1 VDC, then a dropping resistor to get > to 5. Pretty simple! Could definitely fit into a cable. And should > work with a Tamiya 7.2V battery. Sounds like a shunt regulator, that throws away power, not good for portabl= es. Should be a series regulator, which takes at least a zener and a transi= stor. But I expect all that's available on one chip, especially for the ubi= quitous 5V. -Dan |
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