Hi
> On Mar 21, 2017, at 1:07 AM, Chris Albertson
> wrote:
>
> I built one of these using a PWM DAC also. The design was posted to this
> list so I can't take credit for the idea. But we used two PWM output
> pins. The PWM provides more voltage range than is
I built one of these using a PWM DAC also. The design was posted to this
list so I can't take credit for the idea. But we used two PWM output
pins. The PWM provides more voltage range than is needed by the OXO's
EFC. To the output was scaled by a voltage divider. This also scaled down
thew
The "DAC" was PWM based, but used a separate voltage regulator for the
"reference". I never tried it using the USB power as the reference.
The OCXO (+board) uses less than 500 mA warming up (which it does rather
quickly). It's in a small hermetic package about twice the size of a standard
Moin,
On Mon, 20 Mar 2017 17:11:36 -0400
"William H. Fite" wrote:
> You are talking about product design, development and optimization, not the
> production of a one-off for home use. Since performance standards are
> already well established, it is only necessary for the
On Mon, Mar 20, 2017 at 4:14 PM, Mark Sims wrote:
> $3 for an Arduino chip on a PCB with proto area from China (should have
> bought a lot more when they were available),$10 for a small ovenized 5V
> TTL output OCXO (also should have bought a lot more), and $5 for misc
Attilla,
You are talking about product design, development and optimization, not the
production of a one-off for home use. Since performance standards are
already well established, it is only necessary for the developer to test
the bench built instrument against published standards and determine
I did it for $25... $7 for the GPS+antenna module, $3 for an Arduino chip on
a PCB with proto area from China (should have bought a lot more when they were
available),$10 for a small ovenized 5V TTL output OCXO (also should have
bought a lot more), and $5 for misc parts (OK, beer money
e time and frequency measurement <time-nuts@febo.com>
Sent: Monday, March 20, 2017 2:01 PM
Subject: [time-nuts] time-nuts equipment verification from scratch (was: WTB:
GPSDO)
On Thu, 16 Mar 2017 00:06:49 -0700
Chris Albertson <albertson.ch...@gmail.com> wrote:
> I actually did use
On Thu, 16 Mar 2017 00:06:49 -0700
Chris Albertson wrote:
> I actually did use your method. I have a Rb and Thunderbolt, a pair
> of freq. counters and so on.But still I wanted to see if I could
> build from scratch and verify proper operation and keep the budget