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31
A look Inside #14 - Tekpower TP3016M Battery Power? - Part 1

https://www.youtube.com/watch?v=2MeEpbpXtbc

A  look to see if the Tekpower TP3016M can be powered from a Battery?
In Part 2 we take a closer look inside at how it works.

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32
Odd Ball #3 - Tekpower TP3016M Portable Handheld Variable DC Power Supply

https://www.youtube.com/watch?v=CvCTD9-eLYs

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A look at the Tekpower TP3016M Portable Handheld Variable DC Power Supply.

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33
YouTube Video Episodes / T4D #143 - HA Clock and DIY PSU Update
« Last post by SeanB on April 28, 2020, 02:11:02 PM »
T4D #143 - HA Clock and DIY PSU Update

https://www.youtube.com/watch?v=lw1vFPI8wF0

I add an analog clock to my HA (High Accuracy) Arduino clock project.
I chat about progress on the collage DIY Power Supply Project.
Bits from Adafruit:

I did not use this one but I have it on order, Stepper motor - NEMA-17 size - 200 steps/rev, 12V 350mA:
https://www.adafruit.com/product/324

This is the one I used from Amazon:
https://www.amazon.com/gp/product/B00PNEPF4O

Adafruit TB6612 1.2A DC/Stepper Motor Driver Breakout Board:
https://www.adafruit.com/product/2448

This is the board I should have used with the Stepper from Amazon, I have it on order:
Adafruit DRV8833 DC/Stepper Motor Driver Breakout Board:
https://www.adafruit.com/product/3297

-----------------------------------------------------------------------------------------------------------------------
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34
YouTube Video Episodes / Agilent 3458A Accuracy After 7 Years With No Calibration.
« Last post by SeanB on April 22, 2020, 01:55:48 PM »
Agilent 3458A Accuracy After 7 Years With No Calibration.

https://www.youtube.com/watch?v=G0UTNEumFIk

A look at my 3458A Accuracy After 7 Years With No Calibration.
I do a comparison against Doug's 10V, .002% Voltage Reference:

https://voltagestandard.com/0025%25-10v-reference

This is in preparation for a review of Ian's Handheld Precision Digital Voltage Source - PDVS2mini:

https://www.ianjohnston.com/index.php/onlineshop/handheld-precision-digital-voltage-source-2-mini-detail?showall=1


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35
YouTube Video Episodes / Odd Ball #2 - Owon AS101 Oscilloscope Review
« Last post by SeanB on April 13, 2020, 11:06:30 AM »
Odd Ball #2 - Owon AS101 Oscilloscope Review

https://www.youtube.com/watch?v=jETpFanotxA

I take a look at the Owon AS101 "analog like" Oscilloscope.
Does anybody else have a use case for one of these??

https://www.owon.com.hk/products_1_channel_oscilloscope

Spec Sheet

http://files.owon.com.cn/specifications/AS%20Series%20DSO.pdf



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36
YouTube Video Episodes / Vici VC8145 Bench Multimeter - Calibration Attempt - Pt 4
« Last post by SeanB on April 01, 2020, 02:23:39 AM »
Vici VC8145 Bench Multimeter - Calibration Attempt - Pt 4

https://www.youtube.com/watch?v=Y-DYo_L3l3A

A look at calibrating the Vici VC8145. Challenges with calibrating AC voltage.

A great written review and look inside by Henrik:
https://lygte-info.dk/review/DMMVici%20VC8145%20UK.html

Software by Hendrick for this and other meters:
http://lygte-info.dk/project/TestControllerIntro%20UK.html

A couple of articles about multimeters, these two are about the design:
https://lygte-info.dk/info/DMMDesign%20UK.html

https://lygte-info.dk/info/DMMDesignProtection%20UK.html

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37
YouTube Video Episodes / Vici VC8145 Bench Multimeter - A Look Inside - Pt 3
« Last post by SeanB on March 27, 2020, 08:19:04 AM »
Vici VC8145 Bench Multimeter - A Look Inside - Pt 3

https://www.youtube.com/watch?v=-d5GvizNQ-w

A look inside the Vici VC8145 to see how it operates.
A great written review and look inside by Henrik:
https://lygte-info.dk/review/DMMVici%...
Software by Hendrick for this and other meters:
http://lygte-info.dk/project/TestCont...

ICs inside the Vici VC8145:
The main multimeter IC, FS9704:
https://www.ic-fortune.com/upload/Dow...
Micro Processor/Controller, Holtek HT48R30A-1:
https://www.dataman.com/media/datashe...
LCD driver and RS232 data interface, FSUP01-003.
RMS-to-DC Converter, Analog Devices AD737J:
https://www.digchip.com/datasheets/pa...
Voltage Reference Diode, Texas Instruments LM185-1.2-N:
http://www.ti.com/lit/ds/symlink/lm38...
Dual D-type flip-flop, HEF4013B:
https://assets.nexperia.com/documents...
EEPROM, ATMEL AT93C46:
http://ww1.microchip.com/downloads/en...

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38
Rubidium Frequency Standard Buyers Guide - High Accuracy Clock Project

https://www.youtube.com/watch?v=Nd2GOtPyXUM

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------------------------------ Click "Show more" -------------------------------------------
In this video I provide some guidance and tips to buying a  Rubidium Frequency Standard on eBay.
Some helpful links:
http://www.ham-radio.com/sbms/LPRO-101.pdf
http://www.wriley.com/A%20History%20of%20the%20Rubidium%20Frequency%20Standard.pdf
http://www.tect-electronics.com/uploads/files/Accubeat/AR60A%20Spec%2024%205%2011.pdf

FEI Frequency Standards:
https://www.prc68.com/I/FEIFS.shtml
https://time-nuts.febo.narkive.com/jEZIVGmI/fe-5682a-coming-any-info

Mini Precision GPS Reference Clock:
http://www.leobodnar.com/shop/index.php?main_page=product_info&cPath=107&products_id=301
http://www.ka7oei.com/10_MHz_Rubidium_FE-5680A.html

FEI Rubidium Atomic Frequency Standards:
https://freqelec.com/low_g_oscillators/

----------------------------------------------------------------------------------------------------------------------------------------

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39
General Discussion / Re: Various bench safety questions...
« Last post by SeanB on March 16, 2020, 01:01:14 AM »
How about simply getting a small consumer unit, with 4 ways, and installing the box inline with the cable, with cable glands onto the cable. that way you can use a DIN mounting AC DC GFCI along with a 16A breaker.
40
General Discussion / Various bench safety questions...
« Last post by bsodmike on March 14, 2020, 06:42:51 AM »
Hi all/Martin -

I'm putting a small bench/workspace together and found your videos on isolation and potential shocking dangers at the bench.

For the past 25 years or so I've always relied on UPSes to provide stable power to my computer-related equipment, and I plan to follow the same practice as I'm now in an apartment where the generator kicks in after a short delay whenever the mains power fails.  Whenever the generator engages/disengages, the mains power can surge as it is extremely poorly regulated as well.

Therefore, I plan to run my bench equipment via a UPS; right now I only have a Tektronics 'scope and a Keysight programmable bench PSU.  If anything were to float, it will be the DUT, not my 'scope.

Unfortunately I've not been able to locate a 240vdc capable inline-GFCI (with UK plug/sockets) -- so I'll have to rely on the GFCI fitted in the breakerboard.

Any further thoughts on this?

Cheers, M.
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