Sharp EL-8 calculator

From: Joe <rigdonj_at_cfl.rr.com>
Date: Sun May 12 21:58:14 2002

At 09:05 PM 5/12/02 +0100, you wrote:
>>
>> Tony,
>>
>> That's a good guess but it doesn't have one. It does have a three
>> position manual switch on the side (DC-Off-AC). I pulled the thing
>
>I still wonder about separate inputs for battery charging and logic
>supply. That could be done with the 3 position switch you mentioned :

   It is.


>
>DC : Both inputs disconnected, battery supplies logic
>
>Off : Charger input connected to battery, no connection to logic
>
>AC : Charger input connected to battery, Supply input connected to logic.
>
>> apart today and it has some very strange circuitry inside. I figured out
>
>Have you traced out the wiring to the swtich and the connector yet?

  Yes I traced it out between the jack, switch and battery connector. (Pretty bizzare circuit IMO) I didn't want to tear any further into the calculator at this time. I found out enough to allow me to power it up and test it. (Those Itrode (sp?) displays sure look nice!) However I was wondering about the 2nd Dc voltage but I think Don Maslin's message told me what I needed to know for that.

   Joe
Received on Sun May 12 2002 - 21:58:14 BST