Author Topic: EEVblog #1190 - Mailbag Review Bonanza  (Read 3725 times)

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Offline EEVblog

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EEVblog #1190 - Mailbag Review Bonanza
« on: March 15, 2019, 10:32:03 pm »
A look at three major products in this lengthy Mailbag.



SPOILERS:

LabJack T7-Pro Multifunction DAQ with WiFi, Ethernet, and USB
https://labjack.com/products/t7

15:56 Balena Fin Raspberry Pi Compute module industrial computer
https://www.balena.io/fin/

29:29 Dodgy truck LED tailight assembly

38:00 Joulescope: Precision DC Energy Analyzer Kickstarter
With lengthy discussion on current measurement autoranging.
https://www.kickstarter.com/projects/jetperch/joulescope-precision-dc-energy-analyzer

 
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Offline gir

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Re: EEVblog #1190 - Mailbag Review Bonanza
« Reply #1 on: March 16, 2019, 03:11:27 am »
Regarding the absence of a microSD card: At $WORK we had dozens of ┬Ásdcards in our custom monitoring system fail (the Pi is known for this). Offering only the more reliable eMMC storage is (imho) the correct way to go.
 

Offline johnlsenchak

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Re: EEVblog #1190 - Mailbag Review Bonanza
« Reply #2 on: March 16, 2019, 05:01:57 am »

I thought the lab  was flooded, I would  have  figured    it would have been a  swimming  pool  by the time you did this video  LOL
John Senchak "Daytona  Beach  Florida "
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Offline highlanderIII

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Re: EEVblog #1190 - Mailbag Review Bonanza
« Reply #3 on: March 16, 2019, 09:48:05 am »
Dave, did you just pull the RF connector off the WiFi module of the LabJack (at 4:53) ?
None of this new Wi-Fi rubbish, I'll use the DB25 connector!  ;D


OK, coax connects to Y1, not to J1 (visible at 6:03).   :palm:
« Last Edit: March 16, 2019, 10:39:23 am by highlanderIII »
Back from haitus
 

Offline pinchies

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Re: EEVblog #1190 - Mailbag Review Bonanza
« Reply #4 on: March 16, 2019, 02:44:09 pm »
That labjack? I was wondering where it was used.

Coincidentally, I just saw one in the field today - in a quantum computer: https://youtu.be/6yaY4Fw-ovM?t=242

Hope the lab is drying out Dave!
 

Online darik

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Re: EEVblog #1190 - Mailbag Review Bonanza
« Reply #5 on: March 16, 2019, 11:06:51 pm »

I thought the lab  was flooded, I would  have  figured    it would have been a  swimming  pool  by the time you did this video  LOL

At the very end he mentions that it's starting to hail outside....
 

Offline nixfu

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Re: EEVblog #1190 - Mailbag Review Bonanza
« Reply #6 on: March 16, 2019, 11:39:59 pm »
Dave, I liked that you did long segments in this mailbag.   It's nice to have a mailbag like that sometimes.  I know you feel like you have to do the wham-bam-thank-you-mam style you often do because you are so backed up with mail.  But personally I like this style.
 
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Offline chickenHeadKnob

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Re: EEVblog #1190 - Mailbag Review Bonanza
« Reply #7 on: March 17, 2019, 12:04:54 am »
Dave, I liked that you did long segments in this mailbag.   It's nice to have a mailbag like that sometimes.  I know you feel like you have to do the wham-bam-thank-you-mam style you often do because you are so backed up with mail.  But personally I like this style.

The segment on the joule-scope would have been a decent show all by itself. Fast, good  and information dense - well done Dave. It was obvious  you have been thinking about the design issues involved with this type of instrument. I did wish to know which ADC is being used and if the onboard STM32f091 "inguard processor" ADC+DACs are utilized, but that is just nit-picking.
 

Offline EEVblog

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Re: EEVblog #1190 - Mailbag Review Bonanza
« Reply #8 on: March 17, 2019, 12:21:43 am »
Dave, I liked that you did long segments in this mailbag.   It's nice to have a mailbag like that sometimes.  I know you feel like you have to do the wham-bam-thank-you-mam style you often do because you are so backed up with mail.  But personally I like this style.

This longer rambling "real time first try" format is actually easier and quicker to produce than a more polished mini-review.
 
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Offline EEVblog

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Re: EEVblog #1190 - Mailbag Review Bonanza
« Reply #9 on: March 17, 2019, 12:23:17 am »
Dave, I liked that you did long segments in this mailbag.   It's nice to have a mailbag like that sometimes.  I know you feel like you have to do the wham-bam-thank-you-mam style you often do because you are so backed up with mail.  But personally I like this style.

The segment on the joule-scope would have been a decent show all by itself. Fast, good  and information dense - well done Dave. It was obvious  you have been thinking about the design issues involved with this type of instrument.

I thought about splitting it out into a 2nd video but it wasn't polished enough for a standalone review IMO, it was just me rambling and doing a first time play around with it, so decided to keep it in the mailbag.
 

Offline EEVblog

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Re: EEVblog #1190 - Mailbag Review Bonanza
« Reply #10 on: March 17, 2019, 12:25:24 am »

I thought the lab  was flooded, I would  have  figured    it would have been a  swimming  pool  by the time you did this video  LOL

At the very end he mentions that it's starting to hail outside....

That's when I headed downstairs to film it and I came back to a flooded lab  :palm:
 

Online splin

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Re: EEVblog #1190 - Mailbag Review Bonanza
« Reply #11 on: March 17, 2019, 12:36:41 am »
The segment on the joule-scope would have been a decent show all by itself. Fast, good  and information dense - well done Dave. It was obvious  you have been thinking about the design issues involved with this type of instrument. I did wish to know which ADC is being used and if the onboard STM32f091 "inguard processor" ADC+DACs are utilized, but that is just nit-picking.

ADS7056 - U22 and U26. That Dave happened to show it in the Digikey listing was presumably just chance because it happens to be the cheapest 2MSPS+ 14 bit ADC, and presumably why it was selected for the Joulescope (but underclocked at 2MSPS for some reason).
 
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Offline cjurczak

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Re: EEVblog #1190 - Mailbag Review Bonanza
« Reply #12 on: March 17, 2019, 04:02:11 am »
Where can I doing those high resolution photos? Love to see close yours of the PCBs if possible!
 

Offline EEVblog

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Re: EEVblog #1190 - Mailbag Review Bonanza
« Reply #13 on: March 17, 2019, 08:28:14 am »
Where can I doing those high resolution photos? Love to see close yours of the PCBs if possible!

https://www.flickr.com/photos/eevblog/46486019735/in/dateposted-public/
 

Offline cjurczak

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Re: EEVblog #1190 - Mailbag Review Bonanza
« Reply #14 on: March 17, 2019, 12:27:57 pm »
No bottom side?
 

Offline artag

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Re: EEVblog #1190 - Mailbag Review Bonanza
« Reply #15 on: March 19, 2019, 07:26:55 pm »
Huge ++ for the phoenix connector on that Balena board. I really hate using power jacks or USB for permanently-assembled systems. I usually end up fitting some sort of expansion board to pick up the power input on 0.1" headers.

I also didn't realise the compute module supported uPCI  - that's a pretty unusual feature for a small, cheap(ish) board. Must remember that next time I need an embedded board with PCI.
 
 

Offline gearshredder

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Re: EEVblog #1190 - Mailbag Review Bonanza
« Reply #16 on: April 03, 2019, 04:05:08 pm »
Dave, for the LED tail light, the supply goes up to 30V as a 24v Fiber Nickel Cadmium (20x1.2v) nominal pack will sit at a 30v float voltage. These FNC cells are used in rail passenger vehicles but have different grades for engine starting, UPS, and general purpose.
A lead acid style should only reach about 28v or so.
« Last Edit: April 03, 2019, 04:08:18 pm by gearshredder »
 


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