LaFonera Hardware Power-Sources

From DD-WRT Wiki

(Difference between revisions)
Jump to: navigation, search
Revision as of 04:36, 17 February 2007 (edit)
Paxswill (Talk | contribs)
(Correction about LM7805, suggest Zip tip)
← Previous diff
Revision as of 13:44, 18 February 2007 (edit) (undo)
Paxswill (Talk | contribs)
(Added section on building a battery pack.)
Next diff →
Line 2: Line 2:
== LaFonera Battery Pack or Car-Adaptor == == LaFonera Battery Pack or Car-Adaptor ==
- +You can even use a LiIon battery and a stepup circuit. (or power LaFonera from the inside without the 3,3V regulator)
-You cannot use a LM7805 as La Fonera uses 2 amps, and most output 1 amp. They might be usable if you used a pair of them in parallel. For building the plug, a SCSI Zip 100 power adapter tip can be used instead of the original adapter. You can even use a LiIon battery and a stepup circuit. (or power LaFonera from the inside without the 3,3V regulator)+
For those willing to take the LiIon approach, make sure you get a battery with built-in battery protection, which prevents the battery from bursting in flames (literally) when shorted, over or under-charged. It is also better to get a proper LiIon charger, which will work within the safe parameters of the battery. For those willing to take the LiIon approach, make sure you get a battery with built-in battery protection, which prevents the battery from bursting in flames (literally) when shorted, over or under-charged. It is also better to get a proper LiIon charger, which will work within the safe parameters of the battery.
 +
 +== How To Build a Battery Pack ==
 +To build my battery pack, I used an LM7805A, an external SCSI Zip 100 drive power adapter tip, a 9 volt battery clip, and a 9 volt battery. I soldered the positive wire from the battery clip to the input lead of the LM7805A, and the ground wire of the battery clip to the ground lead on the LM7805A. Then I soldered the sleeve of the tip to the ground of the LM7805A, and the inner hole to the output lead of the LM7805A. Then I attached a heatsink to the LM7805A to makesure it wouldn't overheat. Then I put everything into an Altoids Gum container and insulated everything with hot glue. The battery pack still gets warm, but not too bad.

Revision as of 13:44, 18 February 2007

You are here: DD-WRT wiki mainpage / LaFonera / Hardware / Power-Sources

LaFonera Battery Pack or Car-Adaptor

You can even use a LiIon battery and a stepup circuit. (or power LaFonera from the inside without the 3,3V regulator)

For those willing to take the LiIon approach, make sure you get a battery with built-in battery protection, which prevents the battery from bursting in flames (literally) when shorted, over or under-charged. It is also better to get a proper LiIon charger, which will work within the safe parameters of the battery.

How To Build a Battery Pack

To build my battery pack, I used an LM7805A, an external SCSI Zip 100 drive power adapter tip, a 9 volt battery clip, and a 9 volt battery. I soldered the positive wire from the battery clip to the input lead of the LM7805A, and the ground wire of the battery clip to the ground lead on the LM7805A. Then I soldered the sleeve of the tip to the ground of the LM7805A, and the inner hole to the output lead of the LM7805A. Then I attached a heatsink to the LM7805A to makesure it wouldn't overheat. Then I put everything into an Altoids Gum container and insulated everything with hot glue. The battery pack still gets warm, but not too bad.