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> My Sl-5500 Security Tool!
post Mar 8 2006, 01:59 AM
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Here is my mod of my zaurus! It has a external antenna plug and extra 10000mAh battery for long lasting. cool.gif
Here is some pics.
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post Sep 1 2006, 05:53 AM
Post #2

Group: Members
Posts: 1,565
Joined: 7-April 05
From: Sydney, Australia
Member No.: 6,806

all you need is a 3 pin regulator, one pin is Vin one is gnd and the other is Vout

a low drop out regulator provides regulation at voltages above Vin -Vout => 0.2 the 7805 you need about a 1v diffrence, so if its a 5v vout then you get regulation down to 5.2v then it cuts out and you will get 5.2v going into your device

the erason i mention that is that some Z's are picky about thier input voltage and will blow the charging circutry if you give it more than 5.1v

the best solution is to just add another cell to your pack and get a 7805 from any electroncis supplier in your local town (they are as common as transistors/resistors) and also grab 2x 10uF electrolitic capacitors

if you do follow my advice then the middle leg is gnd, if the tab is facing away from you then the 7.2v comes in the left pin and out the right, all you have to do is put a capacitor in parrelel to the right and middle pins, and the left and middle pins. if you arent sure which way they go in (electrolitics only go in one way unless you like big bangs and cleaning up fluff for an hour) or even ask them to draw you a diagram

also keep in mind that at 7.2v and with wires less than 5cm on Vin and Vout you dont actually need the capacitors as the battery has very little noise in the line and the load is fairly constant (the capacitors help to even out the flucutaitons and provide power when there is a huge spike, which you wont have), if you dont belive me check the data sheet

you dont even need beradboard if you just have insulated wires.

good forms of insulation i have persanally used in a live PC:
heat shrink (the best)
stickytape (good in a pinch)
bluetack: the most handy discovery i ever made smile.gif

Z current draw is 1A max, it can go higher but you wont domadge your Z if you cant provide enogh, the 7805 is ratted at 1A and will go higher in most cases (you can make it do 25A if you read the data sheet wink.gif

avoid the 78L05 which looks like a small black cylinder, its ratted at only 100ma's the 7805 has a huge metal tab at the back, in fact right down 7805 because the 7905 will give you -5v and WILL fry your Z (a mistake you do not want to make)

well i hope that is all you need to get satrted, a bit more than you needed but at least you are aware of the issues. if you have any problems then just post back, PM me or if you live in australia near sydney i am willing to make one up for you (i have tha parts here to build about 20)
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zacklau   My Sl-5500 Security Tool!   Mar 8 2006, 01:59 AM
SlackwareLinux   What wireless card are you using in that picture?   Mar 8 2006, 05:45 PM
xamindar   Nice! Did you build your own battery pack? W...   Mar 8 2006, 05:49 PM
zacklau   I moded my WCF-12, Then I builded a battery with a...   Mar 12 2006, 03:20 AM
SlackwareLinux   QUOTE(zacklau @ Mar 12 2006, 03:20 AM)I moded...   Mar 12 2006, 05:41 PM
Legodude522   QUOTE(zacklau @ Mar 12 2006, 07:20 AM)I moded...   Oct 22 2006, 03:30 PM
db2guru   QUOTE(zacklau @ Mar 8 2006, 09:59 AM)Here is ...   Mar 17 2006, 11:23 AM
telemetric_au   can you run your cf wifi now without the antenna ?...   Apr 5 2006, 01:09 AM
zacklau   yes it can run without the antenna, but the signal...   Apr 24 2006, 10:26 PM
telemetric_au   QUOTE(zacklau @ Apr 25 2006, 05:26 PM)yes it ...   Apr 25 2006, 04:13 AM
dlichterman   Hey what are the details on that battery......im i...   Aug 21 2006, 11:51 AM
dlichterman   Extra battery? Ok I found this thing laying aroun...   Aug 29 2006, 04:15 PM
Drake01   QUOTE(dlichterman @ Aug 29 2006, 07:15 PM)Ext...   Aug 29 2006, 07:48 PM
Da_Blitz   careful, the common 7805 dosnt provide regulation ...   Aug 30 2006, 05:34 AM
Drake01   QUOTE(Da_Blitz @ Aug 30 2006, 08:34 AM)carefu...   Aug 30 2006, 04:27 PM
dlichterman   Right see if i use MiMh @ 1.2V would that work   Aug 30 2006, 01:00 PM
Da_Blitz   all you need is a 3 pin regulator, one pin is Vin ...   Sep 1 2006, 05:53 AM
Drake01   QUOTE(Da_Blitz @ Sep 1 2006, 08:53 AM)all you...   Sep 1 2006, 12:49 PM
Da_Blitz   actually if you put a heatsink on the 7805 it will...   Sep 2 2006, 05:20 AM
Da_Blitz   just found out i can get thin RC plane battery pac...   Oct 24 2006, 06:51 PM

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