| Subject: | Re: External battery pack for Sony MZ RH1 MiniDisc? |
|---|---|
| From: | "jpbeale" jpbeale |
| Date: | Wed Jun 13, 2007 5:43 pm ((PDT)) |
--- In Paul Jacobson <> wrote: > I came across a post on the minidisc.org forum describing a DIY usb = > battery pack for the RH1. The design has a resistor between the +/- > data lines which is apparently required so the RH1 can detect that a > charger/power supply is attached. I suspect the difference between > working and non-working battery packs is this resistor. > For the DIY inclined, the schematic is linked... > http://forums.minidisc.org/index.php?showtopic=3D15378&st=3D0 Absolutely correct. I got my 4xAA pack working based on that info. The RH1 needs about 20k between USB pins 2 and 3 to work with an external USB power supply. I made some measurements and took some photos, you can see the details here: http://beale.best.vwh.net/measure/USB/index.html |
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