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This forum is locked: you cannot post, reply to, or edit topics. Calculator Modifications => Calculator Hardware, Electronics, Robotics
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Unregistered HyperCam 2

Super Elite (Last Title)

Joined: 10 Nov 2003
Posts: 4468

Posted: 20 Jan 2008 05:43:33 pm    Post subject:

Yep. It's a universal supply that works with any calculator that takes AAA batteries. Here's a cleaned-up version of the earlier diagram.

Special part notes...
. . . . . . . . . . . . . . . .
CALC POSITIVE/NEGATIVE - This is the important part. NEGATIVE is a connection to the calc's "-" battery terminal. BUT to make the POSITIVE connection, take the calc's + battery terminal and cut it in half using heavy pliers. The half still connected to the calc represents the POSITIVE connection. The half that can still touch the battery is the represents the "+" where it says "Normal AAA Batteries" in the diagram. I'll hopefully make some photos to explain where to cut this week.

LED Color - If your LED color is red, orange, yellow, or green, use 220 Ohms for R1. If your LED color is blue, violet, ultraviolet, white, or warm white, use 100 Ohms for R1. This system will not support high-brightness type LEDs (>75mA).

JP1 This is any 2.5mm jack connector used with wall adapters. Not shown is the wall adapter itself, which should be in the 9 Volt - 12 Volt range for best results.

B1 - This any full-wave bridge that can withstand your wall adapter's voltage and 3 Amps surge current.

Bypass Switch - This is an optional switch to give a slight contrast boost if you're using only the AAA batteries. Only use it if the Calc DBS is unplugged and your AA batteries are removed.

Last edited by Guest on 21 Jan 2008 01:09:10 am; edited 1 time in total
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Advanced Member

Joined: 09 Oct 2007
Posts: 339

Posted: 21 Jan 2008 12:08:13 pm    Post subject:


I gotta get one of those! Can I find one on ebay, or only from you?
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Joined: 10 Oct 2007
Posts: 160

Posted: 23 Jan 2008 08:06:47 pm    Post subject:

Don't look too great. Not much of a Chic magnet.
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Calc Guru

Joined: 14 Feb 2007
Posts: 1110

Posted: 23 Jan 2008 08:54:34 pm    Post subject:

BatBlaster wrote:
Don't look too great.  Not much of a Chic magnet.

Yeah...but the first thing I do when I meet a girl...or anyone...isn't showing them my calculator Cool
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Active Member

Joined: 22 Aug 2007
Posts: 559

Posted: 23 Jan 2008 09:17:29 pm    Post subject:

magicdanw wrote:
Yeah...but the first thing I do when I meet a girl...or anyone...isn't showing them my calculator Cool
Is that a bad thing to do? :confused:
That explains alot... Neutral
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Calc Guru

Joined: 17 Apr 2007
Posts: 1233

Posted: 24 Jan 2008 08:21:46 am    Post subject:

Meh I asked My current gf to your first date with my calc. TI-basic FTW Just Joking
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Unregistered HyperCam 2

Super Elite (Last Title)

Joined: 10 Nov 2003
Posts: 4468

Posted: 24 Jan 2008 05:33:07 pm    Post subject:

Disclaimer: Built-in chick magnet may actually repel females.
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