I like the etch-a-sketch David!! The new models must have wifi-what will
they think of next??!!

Seriously though...I think you still need to decouple each cmos chip
with a .1uF as close to the Vcc and Ground terminals as possible.

Happy soldering.

Art

On 10/30/18 10:49 AM, David C Brown wrote:
> Power supply for a circuit with a handful of CD400 chips.
>
> 12vdc from wall-wort charges a 9volt NiMH through a series resistor.  CMO=
S
> runs of battery.
> Just the two components.  What have I overlooked?
>
> __________________________________________
> David C Brown
> 43 Bings Road
> Whaley Bridge
> High Peak                           Phone: 01663 733236
> Derbyshire                eMail: dcb.home@gmail.com
> SK23 7ND          web: www.bings-knowle.co.uk/dcb
> <http://www.jb.man.ac.uk/~dcb>
>
>
>
> *Sent from my etch-a-sketch*

--=20
http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.