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General Category => DC/Battery Powered Commodore 64 => Topic started by: Remzi on February 13, 2019, 10:55:55 PM

Title: Step by step guide for the internal battery mod
Post by: Remzi on February 13, 2019, 10:55:55 PM
A friend from Italy asked me to help him making this mod.I will go in to more detail.

STEP 1 Building the battery pack:

Shopping list.

1 X  Battery Charger Protection Board Module (https://www.ebay.it/itm/3S-10A-18650-Li-ion-Lithium-Batterie-Battery-3-7V-BMS-Charger-Protection-Board/123201105457?hash=item1caf5bae31:g:r8gAAOSwQEtbKcDI:rk:1:pf:0)

6 X 18650 Batteries (https://www.ebay.it/sch/i.html?_odkw=6+pc+18650&_sop=1&_osacat=0&_from=R40&_trksid=p2045573.m570.l1313.TR12.TRC2.A0.H0.X18650+batteria.TRS0&_nkw=18650+batteria&_sacat=0)

1 X DC-DC Step down buck converter (https://www.ebay.it/itm/Convertitore-DC-DC-2X-mini-3A-Step-Down-buck-Alimentazione-3V5V-16V-MP2307-CRIT/173515547705?hash=item2866552439:g:TlsAAOSwlRpZZw3O:rk:2:pf:0)

1 X Soldering Iron (https://www.ebay.it/itm/HANDHELD-MINI-8W-USB-SALDATORE-A-STAGNO-SALDATRICE-SOLDERING-IRON/253894979577?hash=item3b1d51eff9:g:iI0AAOSwN41bqfC7:rk:2:pf:0)

1 X Multimeter (https://www.ebay.it/itm/Multimeter-Tacklife-DM03B-Advanced-Electrical-Tester-2000-Counts-Manual-Ranging/153366484763?hash=item23b55ad71b:g:ZF0AAOSwAIdcWg9O:rk:22:pf:0)

(http://www.load64.com/avkit/bat.jpg)





Making the PSU connector cable:

You need the cut off the DIN connector from an old C64 PSU.

(http://load64.com/up/connec1.jpg)

Plug in the DIN connector and find the continuity to the leg in the image above.

Title: Re: Step by step guide for the internal battery mod
Post by: Remzi on February 18, 2019, 06:24:49 PM
Adjusting th step down buck converter:

Apply 12V DC to input of the module and monitor the output with a multimeter.Turn the screw clockwise to drop the voltage to 5V or 5.1V.




(http://www.load64.com/up/b7.jpg)




(http://www.load64.com/avkit/avpnt.jpg)