Author Topic: EEVBlog #930 - Mailbag  (Read 9508 times)

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Offline MobileWill

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Re: EEVBlog #930 - Mailbag
« Reply #25 on: October 06, 2016, 06:55:23 am »
The CNC controller IC reminds me of the STM32F429 in probably the 208 package, but not sure about the corner markings. I will have to check if STM32 uses those.
 

Offline lemming

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Re: EEVBlog #930 - Mailbag
« Reply #26 on: October 06, 2016, 04:53:56 pm »
The CNC controller IC reminds me of the STM32F429 in probably the 208 package, but not sure about the corner markings. I will have to check if STM32 uses those.

Having had a look at the datasheet the location of the two crystals matches up nicely with the OSC_IN and RTC_REF pins on the IC.
The better it felt when you said it, the more likely it is to get you in trouble.

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Offline MobileWill

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Re: EEVBlog #930 - Mailbag
« Reply #27 on: October 06, 2016, 04:59:40 pm »


The CNC controller IC reminds me of the STM32F429 in probably the 208 package, but not sure about the corner markings. I will have to check if STM32 uses those.

Having had a look at the datasheet the location of the two crystals matches up nicely with the OSC_IN and RTC_REF pins on the IC.

I just checked and my stm32f429 only has two dimples. But it is only 144pin.

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Offline strangersound

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Re: EEVBlog #930 - Mailbag
« Reply #28 on: October 11, 2016, 08:04:01 am »
The Russian multimeter is a beauty. I was not expecting some quality point to point wiring when he opened it. The Sinclair, not so much. ;)

Dave did make me feel better about my antiquated multimeter since he was raving about his first being an RS and gave him years of service. Mine is a Radio Shack (Micronta) 22-211A. I'm guessing I've had it since around '94/95, so it's served me well since I've never had an issue with it. It's always been for low V/A use, so I' guessing that's probably helped. It was a one of the nicer meters RS had back in the day.

"I learned a long time ago that reality was much weirder than anyone's imagination." - Hunter S. Thompson
 

Offline kj5cn

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Re: EEVBlog #930 - Mailbag
« Reply #29 on: October 11, 2016, 12:55:52 pm »
That Russian Multimeter is C-20 - very popular and ubiquitous model in the USSR in the 60's-70's. I got one as a teenager and had it for something like 20-years - never failed me even with all the abuse that a stupid kid could impart on it.
Too bad Dave failed to open the battery compartment - the battery is a unique 4.5V dry cell with flat leads, which were very conveniently located for one's tongue to fit in for voltage measurement  ;D

Peter.
« Last Edit: October 11, 2016, 12:57:48 pm by kj5cn »
 

Offline NottheDan

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Re: EEVBlog #930 - Mailbag
« Reply #30 on: October 13, 2016, 07:02:38 am »
Too bad Dave failed to open the battery compartment - the battery is a unique 4.5V dry cell with flat leads, which were very conveniently located for one's tongue to fit in for voltage measurement  ;D
Unique? Well, they aren't all that common anymore but when I was a kid they were ubiquitous.
 


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