In message <4b8831fa.8010...@christiantena.net>, Philip writes: >I want to power my net5501 from a spare 12V car battery that I have.
First off, car batteries are not optimal, but it will work. You need to find the float-charge voltage of your battery, this is a bit of a tricky concept for a "wet" battery, but there is lot of wisdom to be surfed. Be aware that a "wet" battery being float-charged will release hydrogen, which needs to be ventilated, you really don't want it to accumulate in some oddball corner of your workshop. Be aware that hydrogen gas exposure makes many metals brittle over time, but with the amount of gas you should see, that's probably not in your lifetime. Once you have a float-charger set up, you will find the voltage is somewhere in the 13.5-15 volt range, depending on battery and temperature. This is fine for the soekris. For your other gadgets, open them up, find the power-supply chip and surf a data-sheet to see what input voltages it will work with. Most of the time, there is no problem up to about 15V. You can use a couple of series-diodes to drop off a volt, if necessary. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. _______________________________________________ Soekris-tech mailing list Soekris-tech@lists.soekris.com http://lists.soekris.com/mailman/listinfo/soekris-tech
