[sdiy] Socket schematic symbol question

[Harry Bissell]

Try shorting the 9V battery terminal. (use a screwdriver like Bob Weigel
recommends :^)   If you see a spark, the battery has enough current to
potentially damage the plating on the plug

(note: do not try the screwdriver test on car batteries...)

H^) harry


----- Original Message -----
From: Graham Atkins <gatkins at blueyonder.co.uk>
To: Harry Bissell <harrybissell at wowway.com>
Cc: Donald Tillman <don at till.com>, Synth DIY <synth-diy at dropmix.xs4all.nl>
Sent: Thu, 28 Oct 2010 13:31:28 -0400 (EDT)
Subject: Re: [sdiy] Socket schematic symbol question

On 28 Oct 2010, at 18:01, Harry Bissell wrote:

> Using the stereo jack is the standard approach, otoh I don't like
> passing battery current through the plug. there may (should) be a  
> capacitor in there
> that might draw a lot of current on charge, and cause pitting of the  
> finisg
> of the jack...
>
> of course its probably less damaging than dropping the jack on a  
> floor full or beer...

You must use some big batteries !!!, I doubt if charging a PP3 size  
battery would
cause much damage, even a high capacity one. Ansmanns 9V NiMH battery is
just 250mAh.

Graham

-- 
Harry Bissell & Nora Abdullah 4eva