Re: Where are all the ESR meters?

On Jul 28, 5:43 am, Tony Williams <to...@xxxxxxxxxxxxxxxxxxx> wrote:
In article <1185543277.828560.28...@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>,
MooseFET <kensm...@xxxxxxxxx> wrote:

On Jul 27, 5:13 am, Tony Williams wrote:
........ Having more power from an AC supply would
Batteries do come in shapes and sizes. A lead acid battery I can
easily lift will provide more power for a short time than a wall
wart. Whatever voltages are needed can be made with DC-DC
converters. As a result, I suggest we let the issue of the
battery float and think in terms of how much power is needed.
Once we know the answers on power and voltages, we can design the
power supply part of the system.

Yes you are right to leave it open, particularly
since it now seems to be a bipolar (5-0-5) supply.
That's much more comfortable for the analogue swings,
and allows CMOS logic to be powered off a 10V supply.

The HC405X switches like those voltages. Those who want to use a PIC
may also want to include +4V and -1V so that the capacitor terminals
that need to be near ground can be part way up on the ADC scale.


.

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