Calc DBS

[DigiTan]

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.

[Ph34r_my_l33t_skillz]

*drooooool*

I gotta get one of those! Can I find one on ebay, or only from you?

[BatBlaster]

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

[magicdanw]

[JoostinOnline]

[TheStorm]

Meh I asked My current gf to your first date with my calc. TI-basic FTW

[DigiTan]

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