Re: Need Circuit Design -- Cheap...

On Fri, 01 May 2009 22:34:17 +1000, Bob Larter <bobbylarter@xxxxxxxxx>
wrote:

Bob Thomas wrote:
Well smoke is the last thing I hope to see,

Well, that's the same for all of us. ;^)

I usually use my bench
power supply and start with the current down to nearly nothing and
then slowly turn it it up the first time until I reach by best
gestimate on the total draw.

Always a good idea.

This does not always keep the smoke from
escaping but the power supply has a light over the current knob that
goes from off (I am supply all the cuurrent the circuit want to very
bright, it wants a LOT more, this is usually a good tell. It is a 20
year old bench supply I got from a surplus place, one of the best buys
I have ever make.

I've always built my own bench supplies, but buying a bought one is a
good thing.

BTW -- Did you know that all electronics works from smoke? Did you
ever see anything work once the smoked escaped... :)

Indeed. ;^)

PS: Please try to reply at the bottom of the post, rather than the top -
it's good manners.

Hi Bob,
Thanks for your feedback and input, I built it today and it
worked perfectly, actually on the first try!! I posted the detailed in
a message to Jim so I will not repeat them here. Again Thanks!!

What it looks like on the breadboard. Neatness is not one of my strong
suits, but it got the job done.

http://people.delphiforums.com/wildbill47/X10/ds7000_mod/ds_mod_bb1.JPG
http://people.delphiforums.com/wildbill47/X10/ds7000_mod/ds_mod_bb4.JPG
http://people.delphiforums.com/wildbill47/X10/ds7000_mod/ds_mod_bb7.JPG
http://people.delphiforums.com/wildbill47/X10/ds7000_mod/ds_mod_bb15.JPG
http://people.delphiforums.com/wildbill47/X10/ds7000_mod/ds_mod_bb17.JPG

.

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