nt: Wednesday, October 07, 2009 1:43 AM
Subject: Re: [time-nuts] DAC resistors
Neville Michie wrote:
Hi,
I am constructing a phase meter to monitor the phase creep of clocks.
It consists of a BCD counter counting say microseconds that has its
count strobed into a latch by a pulse from the cloc
Thanks Bruce,
it looks like a good solution.
cheers, Neville
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Neville Michie wrote:
> Hi,
> I am constructing a phase meter to monitor the phase creep of clocks.
> It consists of a BCD counter counting say microseconds that has its
> count strobed into a latch by a pulse from the clock.
> The Latch drives a DAC which drives a pen recorder and an analogue
> da
Thanks for the suggestions,
Why I want this design is that I want to power it off my UPS which is a
solar panel floating a lead acid accumulator of 20AH capacity.
The whole show will run for years at a time.
I also want to be able to switch decades and keep full scale values
as multiples of
Or a binary counter and binary to BCD driver chips.
-John
>> I am constructing a phase meter to monitor the phase creep of clocks.
>> It consists of a BCD counter counting say microseconds that has its
>> count strobed into a latch by a pulse from the clock. The Latch drives
>> a D
> I am constructing a phase meter to monitor the phase creep of clocks.
> It consists of a BCD counter counting say microseconds that has its
> count strobed into a latch by a pulse from the clock. The Latch drives
> a DAC which drives a pen recorder and an analogue data logger. Now I
> am familia
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
> Behalf Of Neville Michie
> Sent: Tuesday, October 06, 2009 3:19 PM
> To: Discussion of precise time and frequency measurement
> Subject: [time-nuts] DAC resistors
>
>
First off, I'd not mess with building DACs. DAC ICs are cheap and come in
wide varieties. I'd change to a binary counter and use a 10 to 16 bit
commercial DAC.
If you are determined to go the decade BCD route, use the summing junction
of an op-amp in an inverting configuration.
If the decades are
Hi,
I am constructing a phase meter to monitor the phase creep of clocks.
It consists of a BCD counter counting say microseconds that has its
count strobed into a latch by a pulse from the clock.
The Latch drives a DAC which drives a pen recorder and an analogue
data logger.
Now I am familiar wi
