[sdiy] RAM CCD

[Roy J. Tellason]

On Tuesday 25 January 2005 04:05 pm, Ken Stone wrote:

> Also a couple of times I've mentioned using 6116P as battery backed up ram
> and getting at least 15 years out of the batteries (AAA drycells) keeping
> the data intact.

How the heck did you manage to avoid battery leakage?  This turned out to be a 
problem for me with my old Simpson 260 recently...

(Anybody got a parts unit around?)

> ANd each time I have, someone has "corrected" me saying 6116LP. So let me 
> take this opportunity to state emphatically that they are 6116P - NOT the 
> low power ones. Even the regular ones draw little current.

I did a setup on a breadboard to test this some time back,  and was amazed at 
how low the drain actually was.

> As for the NMOS variants, it is a different matter entirely. I forget the
> part number,

2016?  Something like that.  I have some of them around,  salvaged from 1541 
disk drives.  :-)

> but it was a pin for pin drop-in for the 6116, and it GUZZLED current.

Yep.