Author Topic: EEZ Bench Box 3 - Sequel to EEZ H24005  (Read 111111 times)

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Offline prasimix

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Re: EEZ Bench Box 3 - Sequel to EEZ H24005
« Reply #650 on: November 11, 2021, 12:59:59 pm »
What is your firmware now: 1.7.3 or 1.8-alpha1? We changed something around OVP but if you think that something is wrong with DP run a simple list or func generator as square wave and check in YT view if falling edge is too large.

Offline elekorsi

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Re: EEZ Bench Box 3 - Sequel to EEZ H24005
« Reply #651 on: November 11, 2021, 02:01:38 pm »
FW is 1.7.3
I managed to start the FG, but with very low voltage. Ampl=1Vpp, Offs=1,5V, f=50Hz. If i go higher with the Offs, i get an error and can't measure anything...
And it appears to be a problem with the down-programmer, as you can see on the scope print screen. CH1 is the faulty DCP and CH2 is a good one for the reference (with same parameters in FG as faulty DCP)
 

Offline prasimix

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Re: EEZ Bench Box 3 - Sequel to EEZ H24005
« Reply #652 on: November 11, 2021, 02:54:26 pm »
Yes, if the DP is not turned off it is damaged. Please check R29 and Q5.
 
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Offline elekorsi

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Re: EEZ Bench Box 3 - Sequel to EEZ H24005
« Reply #653 on: November 11, 2021, 03:34:02 pm »
Thanks, you were right, it was R29...
 

Offline prasimix

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Re: EEZ Bench Box 3 - Sequel to EEZ H24005
« Reply #654 on: November 11, 2021, 03:52:27 pm »
Right, power resistor in 2512 package is really for optimists. In next revision it will be replaced with TO-220 THT!

Offline prasimix

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Re: EEZ Bench Box 3 - Sequel to EEZ H24005
« Reply #655 on: November 11, 2021, 03:53:27 pm »
Still, check if Q5 is not shorted.

Offline elekorsi

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Re: EEZ Bench Box 3 - Sequel to EEZ H24005
« Reply #656 on: November 11, 2021, 04:00:21 pm »
Q5 is fine, it works now as it should.
Measured Q5 and R29 and both were fine, had to take a closer look to see that cracked solder...
 

Offline victorhooi

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Re: EEZ Bench Box 3 - Sequel to EEZ H24005
« Reply #657 on: January 20, 2022, 11:18:08 am »
Hi,

I noticed mention of a 1.8 firmware - this sounds exciting =). Any idea of what will be included in this?

Also - sorry if this is a really basic question, but say I had a LED driver that takes a 0-10V PWM input signal, for dimming (e.g. link).

How would I drive that from the BB3? Which module can I use for that?
 

Offline prasimix

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Re: EEZ Bench Box 3 - Sequel to EEZ H24005
« Reply #658 on: January 20, 2022, 11:24:15 am »
Firmware 1.8 incomplete list of tasks can be found here: https://github.com/eez-open/modular-psu-firmware/milestone/11

If PWM frequency could be low you can try DCP405 module (Function generator, with voltage set to 10V), or you could use SMX46 analog outputs, or MIO168 analog or PWM outputs.

Offline prasimix

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Re: EEZ Bench Box 3 - Sequel to EEZ H24005
« Reply #659 on: January 20, 2022, 11:26:03 am »
I forgot to mention that 1.8. pre-release (Alpha 2) can be download from https://github.com/eez-open/modular-psu-firmware/releases/tag/1.8.alpha2
 
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Offline prasimix

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Re: EEZ Bench Box 3 - Sequel to EEZ H24005
« Reply #660 on: March 17, 2022, 12:59:31 pm »
ATTENTION: we have several BB3 enclosures (including foot, display mounting frame and Mean Well mounting frame) for sale. Price 30 EUR (+ S&H)!

As you know the enclosure is custom made and all those who bought only a set of PCBs this is an opportunity to once they assemble all the modules put them in the original enclosure 🪛

Send me PM for details (it's not listed on web store).

Offline prasimix

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Re: EEZ Bench Box 3 - Sequel to EEZ H24005
« Reply #661 on: March 19, 2022, 07:22:49 am »
60% discount valid until the end of March:

https://www.envox.eu/product/prel6-module/ coupon code: 60PRELOFF ... SRP: €143, with coupon: €57.20
https://www.envox.eu/product/smx46-module/ coupon code 60SMXOFF ... SRP: €214, with coupon: €85.60

Feel free to PM me for more details or if you cannot buy it via official store.

Offline prasimix

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Re: EEZ Bench Box 3 - Sequel to EEZ H24005
« Reply #662 on: March 22, 2022, 01:14:09 pm »
Used, functional MIO168 (pre-production): €200 + S&H. PM me if you're are interested:


Offline RoGeorge

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Re: EEZ Bench Box 3 - Sequel to EEZ H24005
« Reply #663 on: June 08, 2022, 06:19:50 am »
Is there any code example of how to connect and send SCPI commands from Python, for example using PyVisa (or maybe some other module).  Doing like this didn't work:  https://www.eevblog.com/forum/projects/exit/msg4192018/#msg4192018

Not asking to debug someone else's code, a simple code example of a "*IDN?" from Python would be enough.  Is there any Python code example for EEZ instruments, please?

Offline mvladic

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Re: EEZ Bench Box 3 - Sequel to EEZ H24005
« Reply #664 on: June 08, 2022, 02:09:51 pm »
Here is an example of using Python to talk with H24005 (and BB3) over serial port.
 
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Offline RoGeorge

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Re: EEZ Bench Box 3 - Sequel to EEZ H24005
« Reply #665 on: June 08, 2022, 04:08:24 pm »
I didn't specify, sorry.  Looking for a LAN example.

Is there any SCPI example from Python, using a LAN connection instead of the serial COM port?

Offline mvladic

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Re: EEZ Bench Box 3 - Sequel to EEZ H24005
« Reply #666 on: June 09, 2022, 07:04:06 am »
Here it is.
 
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Offline prasimix

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Marketplace ...
« Reply #667 on: June 15, 2022, 09:12:55 am »
I clean my workshop and warehouse. Find some bargain on the new Discord #marketplace channel. Invitation link: https://discord.gg/dhYMnCB




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