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Interesting comment on mini-B connector. I always heard that the micro-b was more reliable (see: https://electronics.stackexchange.com/questions/18552/why-was-mini-usb-deprecated-in-favor-of-micro-usb ).

though i only ever had 1 micro-b connector fail (none for micro-b). in the end i standardised on micro-b as this is more common though annoyingly, i still have some mini-b's around which i leave the cable plugged in to avoid annoyance.

Hi Phil, the micro-USB connectors that I encountered were fully SMD and had a tendency to rip off the board taking the pads with them if you pushed too hard. I just had a look on ebay and it looks like you can now get micro connectors with through-hole chassis pins. I would be more confident using those. Based on your linked article it seems I need take care inserting and removing mini-B cables if I want them to last a long time.  My favourite is the original full-size B connector but obviously, it's big.
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Hardware projects / Re: A development board for the STM32G081 Cortex M0+ MCU
« Last post by Phil on Yesterday at 11:45:06 am »
Interesting comment on mini-B connector. I always heard that the micro-b was more reliable (see: https://electronics.stackexchange.com/questions/18552/why-was-mini-usb-deprecated-in-favor-of-micro-usb ).

though i only ever had 1 micro-b connector fail (none for micro-b). in the end i standardised on micro-b as this is more common though annoyingly, i still have some mini-b's around which i leave the cable plugged in to avoid annoyance.

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Hardware projects / Re: A development board for the STM32G081 Cortex M0+ MCU
« Last post by Andy Brown on July 14, 2019, 04:57:06 am »
Thanks for the info about the crystal and also the ch340. I just tried the new_id method and it did work on my Ubuntu VM. I'll give it a try on the Pi later and will also try the permanent fix. Looks promising though.
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Hardware projects / Re: A development board for the STM32G081 Cortex M0+ MCU
« Last post by ddrown on July 13, 2019, 04:37:12 pm »
I've recently built a development board for the new STM32G081RBT6 MCU featuring the Cortex M0+ core.

Hello! And thank you for your videos, I'm a fan.

You mention in the video trying to get the ch340 to work on linux with the 9986 vendor ID.  I think there's two choices:

* add the IDs to /sys/bus/usb-serial/drivers/ch341-uart/new_id https://stackoverflow.com/questions/442833/forcing-driver-to-device-match  (this will have to happen every time you boot)

* recompile the ch341 driver with the new vendor ID:  https://elixir.bootlin.com/linux/latest/source/drivers/usb/serial/ch341.c#L82  (this would have to happen every time you upgraded your kernel)

Quote from: Andy Brown
I have no idea how crystals are constructed but I do find it fascinating and it looks a bit like a tuning fork. Does anyone out there know what’s going on in there?

Crystals physically vibrate so the resemblance to a tuning fork is no accident.  There are different shapes used, and this cut is called the tuning fork shape.  "The chief application [of the tuning fork cut] is the 32.768 kHz RTC crystal" - https://en.wikipedia.org/wiki/Crystal_oscillator#Crystal_cuts
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Hardware projects / A development board for the STM32G081 Cortex M0+ MCU
« Last post by Andy Brown on July 13, 2019, 10:22:18 am »
I've recently built a development board for the new STM32G081RBT6 MCU featuring the Cortex M0+ core.



There's a full write up here and a video on YouTube that you can watch.
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General discussion / Re: Help me in HP z800 workstation
« Last post by Ultimate GaMerZ on July 06, 2019, 08:46:59 am »
Thanks for reply Sir .I read manual and check all thing in board and fixes all issue removs all devices but not fix issue without hdd working perfectly.but I connect power wire in hdd or and DVD no sata wire only power wire .and problem show me .I uploaded my PC issue video here plz check Andy Sir.i update already new bios this Version: 3.61 Rev.A  Release date:Mar 6, 2018.my board Rev: 003
https://support.hp.com/us-en/drivers/selfservice/swdetails/hp-z800-workstation/3718645/swItemId/wk-207280-1

https://vimeo.com/346544447


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General discussion / Re: Help me in HP z800 workstation
« Last post by Andy Brown on July 06, 2019, 04:18:54 am »
Hi, HP's "beep decoder" document is here:

https://support.hp.com/gb-en/document/c03599666

Four beeps = a problem with the power. Unfortunately they don't offer further debugging steps. Thermaltake are well known, quality brand so I expect your new PSU is fine.

When your old PSU died do you think that there is a possibility it fried something on the board at the same time?
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General discussion / Help me in HP z800 workstation
« Last post by Ultimate GaMerZ on July 06, 2019, 02:03:56 am »
Friends I am using ho z800 PC my default PSU damage I bought new PSU Thermaltake 1000w through power and I buy main power cable 18 pin connector in Ali Express and I attached PSU and start the pc but showing 4 time beep and not start pc but I removed my hdd PC working perfect.i don't know what happened this issue plz help me.i attached hdd in PC always showing 4 time beep.and removed hdd working perfectly.plz solve this my issue thanks






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Hardware projects / Re: An easy to build android/bluetooth reflow controller
« Last post by Andy Brown on June 25, 2019, 01:00:21 am »
Hi Howard, yes you are right I used the wrong gender connector there and didn't warn others not to do the same.
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Hardware projects / Re: An easy to build android/bluetooth reflow controller
« Last post by HDRW on June 24, 2019, 09:29:47 am »
Hi Andy, I'm new here, having seen one of "your" reflow boards demonstrated at the Newbury Radio Rally yesterday.  Very impressive!
I'd like to have a go at building one, but at the moment I don't have the time (I'm retired, so have no time to spare!  :-)

I did notice one thing in the video, though:  it looks like you're using an IEC *input* (C14, plug) for the connection to the oven, when it should be an output (C13, socket) - otherwise you could have unshielded pins with live mains on.  Or is it an oprical illusion in the video?

73,

Howard  G1BYY
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