Author Topic: NEW PDVS2mini DC Voltage Reference from Ian Johnston - Reviewed.  (Read 61331 times)

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Offline SHF

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Re: NEW PDVS2mini DC Voltage Reference from Ian Johnston - Reviewed.
« Reply #100 on: December 14, 2024, 11:44:41 am »
I treated myself to the ADR1399 version, very nice device, works excellently!
Precision is no coincidence
 
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Offline wrytech

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Re: NEW PDVS2mini DC Voltage Reference from Ian Johnston - Reviewed.
« Reply #101 on: December 15, 2024, 02:51:59 pm »
Firmware v1.2 is now available for download under the Resources tab on the website:

https://www.wrytech.eu/pages/resources

A PDF file with upgrade instructions and a changelog is also provided.
Additionally, the manual has been updated to include information on the new features introduced in this firmware version.

Best,
Johannes
PDVS 2 Mini v1.6 now available at wrytech.eu
 
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Offline tonyalbus

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Re: NEW PDVS2mini DC Voltage Reference from Ian Johnston - Reviewed.
« Reply #102 on: December 18, 2024, 11:13:53 am »
Received mine yesterday, the ADR1399 version... video review coming soon, but i needed to play with it. could not help to share it.
Yeah that feels great, my meters are good!! Yes! Yes!!!

2464477-0

(yes its not horizontal, but that is just quickly for the picture)
« Last Edit: December 18, 2024, 11:17:10 am by tonyalbus »
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Offline tonyalbus

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Re: NEW PDVS2mini DC Voltage Reference from Ian Johnston - Reviewed.
« Reply #103 on: December 19, 2024, 08:49:39 am »
What software are you guys using for your PDVS2mini for remote control ?
have not connected mine yet, but i have the isolated adapter,

i have been looking for the software from the screenshot from Ian, but i can't find it . (PDVS2mini 20bit V1.0)
also for calibrating the device (calibration for now not needed but who knows for later)

i did found some from other:
https://github.com/DunningtonAudio/PDVS2miniApp

Or for the old one from Ian: (but that is for the older 18 bit i guess prob not to use for this one)
https://www.ianjohnston.com/index.php/onlineshop/handheld-precision-digital-voltage-source-v2-detail

Or are you using something completely different?
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Online J-R

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Re: NEW PDVS2mini DC Voltage Reference from Ian Johnston - Reviewed.
« Reply #104 on: December 19, 2024, 09:49:56 am »
I suppose there will need to be an update to the software to support the 10.22222V output and perhaps some other aspects?

But you could try Ian's Windows software: https://web.archive.org/web/20240617223338/https://www.ianjohnston.com/images/stories/IanJ/VoltageSourcePrecision/PDVS2mini/PDVS2mini.zip
 
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Offline tonyalbus

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Re: NEW PDVS2mini DC Voltage Reference from Ian Johnston - Reviewed.
« Reply #105 on: December 19, 2024, 10:22:43 am »
I suppose there will need to be an update to the software to support the 10.22222V output and perhaps some other aspects?

But you could try Ian's Windows software: https://web.archive.org/web/20240617223338/https://www.ianjohnston.com/images/stories/IanJ/VoltageSourcePrecision/PDVS2mini/PDVS2mini.zip

Thanks!  Yes the intrnet archive, i forgot.  Great that was what i was looking for.
Ian made some great software for GPIB and just watched an old video how he automated the whole bulk calibration for the PDVS, very impressive stuff.
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Offline Cyclotron

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Re: NEW PDVS2mini DC Voltage Reference from Ian Johnston - Reviewed.
« Reply #106 on: December 24, 2024, 05:41:09 pm »
I received my unit yesterday. I regularly get things from mainland China faster.  I'm not lodging a complaint; it's just an observation.
I highly suspect that the holidays and maybe even Canadian post being offline have impacted global shipping. I ordered a KWeld board out of Toronto that should take 2-3 days to Virginia, and it took 2.5 weeks via FedEx.

Okay, what a nice device! I immediately did what most people, I figure, will do: I hooked it up to every meter I had to check its accuracy. I'm happy to say my primary two bench meters are perfect or thereabouts.
That means the recent calibrations I've made are likely good.

I have noticed a behavior I haven't seen reported, and I wanted to mention it here for WRY TECH and others.

I charged mine overnight, and this morning, I was nerding around with it (definitely not fondling).  I turned it off and set it aside when I realized I wanted to check the firmware version.
I clicked the power button, and the display showed the images in the attached photos. My stomach sank a bit. I think I clicked the button for more time, and it came to life normally.

In the end, I can reproduce the results easily. If you just tap the power button the display will pop up some lines and slowly clear. I suspect there's some logic in there that prevents bumping the device and changing the power state. But I'm not sure.

 
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Offline IanJ

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Re: NEW PDVS2mini DC Voltage Reference from Ian Johnston - Reviewed.
« Reply #107 on: December 24, 2024, 05:55:01 pm »
I received my unit yesterday. I regularly get things from mainland China faster.  I'm not lodging a complaint; it's just an observation.
I highly suspect that the holidays and maybe even Canadian post being offline have impacted global shipping. I ordered a KWeld board out of Toronto that should take 2-3 days to Virginia, and it took 2.5 weeks via FedEx.

Okay, what a nice device! I immediately did what most people, I figure, will do: I hooked it up to every meter I had to check its accuracy. I'm happy to say my primary two bench meters are perfect or thereabouts.
That means the recent calibrations I've made are likely good.

I have noticed a behavior I haven't seen reported, and I wanted to mention it here for WRY TECH and others.

I charged mine overnight, and this morning, I was nerding around with it (definitely not fondling).  I turned it off and set it aside when I realized I wanted to check the firmware version.
I clicked the power button, and the display showed the images in the attached photos. My stomach sank a bit. I think I clicked the button for more time, and it came to life normally.

In the end, I can reproduce the results easily. If you just tap the power button the display will pop up some lines and slowly clear. I suspect there's some logic in there that prevents bumping the device and changing the power state. But I'm not sure.

This is caused by not holding the power button down long enough when you want to power it up.
The soft power circuit is integrated into the software, so when you just quickly jab the power button it does send 3.3Vdc to the display & uController but not long enough for the software to run and interact with the soft power switch hardware in order to hold the power on permanently.

The proper way to power up is to hold the power button for a second or so.....then release.

There's nothing wrong with your PDVS2mini.

Ian.
Ian Johnston - Original designer of the PDVS2mini || Author of WinGPIB
Website: www.ianjohnston.com
YouTube: www.youtube.com/user/IanScottJohnston, Odysee: https://odysee.com/@IanScottJohnston, Twitter(X): https://twitter.com/IanSJohnston, Github: https://github.com/Ian-Johnston?tab=repositories
 
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Re: NEW PDVS2mini DC Voltage Reference from Ian Johnston - Reviewed.
« Reply #108 on: December 24, 2024, 05:56:02 pm »
In the end, I can reproduce the results easily. If you just tap the power button the display will pop up some lines and slowly clear. I suspect there's some logic in there that prevents bumping the device and changing the power state. But I'm not sure.
It's perfectly normal behavior. IIRC it's written in the manual that you have to hold the power button to turn it on.
It's either against accidental power on as you say, or the µC is disconnected from the battery by that push button, and holding it down energizes the circuit and it takes some time to initialize and bypass that button electronically so the device stays on. That would be a power saving feature then which is just a guess. Wondering if that's still necessary with todays µCs standby/sleep currents.
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Offline Cyclotron

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Re: NEW PDVS2mini DC Voltage Reference from Ian Johnston - Reviewed.
« Reply #109 on: December 24, 2024, 08:57:14 pm »

The proper way to power up is to hold the power button for a second or so.....then release.

There's nothing wrong with your PDVS2mini.

Ian.

Yup, that's what I figured, and I just didn't communicate well in my post. I only posted about it in case others saw it, and, as I did, a mild panic attack.  I prefer it like it is; as you said, there is nothing wrong with it.
 

Offline wrytech

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Re: NEW PDVS2mini DC Voltage Reference from Ian Johnston - Reviewed.
« Reply #110 on: December 28, 2024, 06:22:01 pm »
Finally following up on the things that came up over the holidays....

What software are you guys using for your PDVS2mini for remote control?

I typically use the Arduino IDE’s Serial Monitor for quick testing or custom Python scripts for more complex tasks. The latter also inspired the changes in software version 1.2, making it easier to reliably retrieve data (mainly temperature) using the “request” option.
I’ve mentioned before that I feel the serial connection is underutilized, likely due to the lack of examples and showcases. It’s on my list to address, but other tasks have taken priority for now.

That said, I encourage you to explore the commands—it’s as simple as opening the Arduino IDE’s Serial Monitor, connecting a PDVS 2 Mini, and sending <KeyVoltage,0,1.23456> to set the voltage to 1.23456 V.

Beyond calibration, I  also use the serial connection to remotely set the voltage on my Agilent E3616A supply, which only accepts control voltages and lacks a direct digital interface. I have used this to simulate battery discharge over a longer time period for example.

I received my unit yesterday. I regularly get things from mainland China faster. I'm not lodging a complaint; it's just an observation.
I highly suspect that the holidays and maybe even Canadian post being offline have impacted global shipping. I ordered a KWeld board out of Toronto that should take 2-3 days to Virginia, and it took 2.5 weeks via FedEx.

Shipping has been challenging because I handle low volumes, which made setting up logistics difficult initially due to minimum quantity requirements. DHL ended up being the best option here. However, since the packages transition through both national postal services, delays are sometimes unavoidable.
Tracking is included with all shipments, and so far, there haven’t been any major issues, with successful deliveries from Alaska to New South Wales. Still, I’ll look into adding an express shipping option that DHL already offers.

Recently, I introduced a cheaper rate for shipping links and the IUSL using “Warenpost International.” So far, this has only been announced in the newsletter.

I have noticed a behavior I haven't seen reported, and I wanted to mention it here for WRY TECH and others.

I charged mine overnight, and this morning, I was nerding around with it (definitely not fondling). I turned it off and set it aside when I realized I wanted to check the firmware version.
I clicked the power button, and the display showed the images in the attached photos. My stomach sank a bit. I think I clicked the button for more time, and it came to life normally.

I’ve noticed streaks on the LCD when turning on devices for the first time after mounting the display in some cases as well. I suspect this is due to stray voltages in the display that take time to dissipate. This issue can also occur if the batteries are removed without switching the unit off. It can take some time for the streaks to disappear, but so far, I haven’t encountered a display with any permanent marks or damage.

As Ian has already kindly mentioned, there’s absolutely nothing to worry about.

Let me know if there’s anything else you’d like me to clarify or address,
Johannes
« Last Edit: December 29, 2024, 11:19:16 am by wrytech »
PDVS 2 Mini v1.6 now available at wrytech.eu
 
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Offline IanJ

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Re: NEW PDVS2mini DC Voltage Reference from Ian Johnston - Reviewed.
« Reply #111 on: December 29, 2024, 12:24:18 pm »
I’ve noticed streaks on the LCD when turning on devices for the first time after mounting the display in some cases as well. I suspect this is due to stray voltages in the display that take time to dissipate. This issue can also occur if the batteries are removed without switching the unit off. It can take some time for the streaks to disappear, but so far, I haven’t encountered a display with any permanent marks or damage.

Yes, I noticed that also sometimes......I.E. if I remember correctly, on the very first boot fresh from the reflow oven and after the firmware is loaded, the Flash ram area in the uC doesn't contain it's default parameters yet and so the LCD can be a bit random and doesn't clear at boot. It could probably be coded around that in setup() but it's only ever going to happen once in it's lifetime......unless the user as per here jabs the power button.

Ian.
Ian Johnston - Original designer of the PDVS2mini || Author of WinGPIB
Website: www.ianjohnston.com
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Offline Cyclotron

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Re: NEW PDVS2mini DC Voltage Reference from Ian Johnston - Reviewed.
« Reply #112 on: January 03, 2025, 03:34:20 am »
but it's only ever going to happen once in it's lifetime......unless the user as per here jabs the power button.

Ian.

And now I've been called a "user".  Oh man, that stings a bit. I've been an engineer and an Architect in Information Technology for nearly 30 years. "USER" has always been a 4 letter word. :D

I guess we are all users at some point.
 

Offline tonyalbus

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Re: NEW PDVS2mini DC Voltage Reference from Ian Johnston - Reviewed.
« Reply #113 on: January 26, 2025, 09:12:56 am »
Here it is on my desk, the change of weather or the wind blowing the other way, coused my last digit not to match in the video :)
but man, the thing is clean and stable...




« Last Edit: January 26, 2025, 09:26:58 am by tonyalbus »
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