Since I burned my fingers with the evil raspberries (I do not like them...) this time I ask before.
Are you happy with the ESP32 based boards? Is the ESP32 running stable for you? Can be used in production?´
Many thanks.
I’ve stayed away after reading horror stories. Things like crashes when you write to flash during interrupts, undocumented behaviour and the ADC sucking complete balls. However there are very few SoC at that level which have the out of box features you might need and you can actually still get the things.
Ergo I’d put the engineering hat on, write your feature requirements down, do a KT decision analysis against that and STM32 and see what comes out.
As for seatbelts, I only wear them on Mondays, Thursdays and occasionally Sundays *
* oh the power of carefully misstating positions
Ok an actual TE post. Black Star Jupiter 2010 arrived. Looks in good condition, appears to actually work fine although I have nothing to check that available at the moment.
Outside:
Insides view 1:
Insides view 2:
Very standard design akin to Thurlby / TTi and it is of the same heritage.
You are having now a good camera, now you need better lighting.
Hmm, that redhead looks familiar...
Since I burned my fingers with the evil raspberries (I do not like them...) this time I ask before.
Are you happy with the ESP32 based boards? Is the ESP32 running stable for you? Can be used in production?´
Many thanks.
I’ve stayed away after reading horror stories. Things like crashes when you write to flash during interrupts, undocumented behaviour and the ADC sucking complete balls. However there are very few SoC at that level which have the out of box features you might need and you can actually still get the things.
Ergo I’d put the engineering hat on, write your feature requirements down, do a KT decision analysis against that and STM32 and see what comes out.
As for seatbelts, I only wear them on Mondays, Thursdays and occasionally Sundays *
* oh the power of carefully misstating positionsI don't wear a belt on my seat anymore unless I'm going out to the store, a restaurant or some appointment. The rest of the time I'm either wearing shorts or it's a pants-free day.
mnem
I am not my pants. No, I am not your pants, either.
Hopefully it'll be good enough for a Sunday drive and hobble through a field of stinky old hams (present company excepted from that - I think ).
Thanks. I surely don't stink, I take a shower once a week whether I need it or not ...
Since I burned my fingers with the evil raspberries (I do not like them...) this time I ask before.
Are you happy with the ESP32 based boards? Is the ESP32 running stable for you? Can be used in production?´
Many thanks.
I’ve stayed away after reading horror stories. Things like crashes when you write to flash during interrupts, undocumented behaviour and the ADC sucking complete balls. However there are very few SoC at that level which have the out of box features you might need and you can actually still get the things.
Ergo I’d put the engineering hat on, write your feature requirements down, do a KT decision analysis against that and STM32 and see what comes out.
As for seatbelts, I only wear them on Mondays, Thursdays and occasionally Sundays *
* oh the power of carefully misstating positions
And then completely fail to find any stock of the STM32 model arrived at.
Actually, there are some relatively new STM32s with onboard wireless functions (if that's why the ESP32 is of interest) and they're new enough that few are actually being used in production, which means there is a little stock availability of them. However they are mostly dual core and rely on that for the wireless functionality, so there are many subtle synchronisation bugs awaiting the unwary embedded programmer who doesn't have a solid understanding of the same.
...As for seatbelts, I only wear them on Mondays, Thursdays and occasionally Sundays *
* oh the power of carefully misstating positionsI don't wear a belt on my seat anymore unless I'm going out to the store, a restaurant or some appointment. The rest of the time I'm either wearing shorts or it's a pants-free day.
mnem
I am not my pants. No, I am not your pants, either.
In the spirit of Volvo's gifting the design of the 3 point seatbelt to the world, because of public good it represented as a safety device, I am here publicly disclosing a novel invention for anyone to manufacture because of the benefits it offers to public safety.
The device is a safety belt worn on the body. It consists of a waist belt and two thigh belts intended to firmly hold the device to the human body or any similar arrangement that will be obvious to practitioners of the art. At the front is a crossed pair of belts that once adjusted to the wearer provide a rigid connection, one from each thigh belt to the waist belt intended to resist and control rearward forces applied to the waist and thigh belts. Adjustment mechanisms in the form of buckles or similar are provided.
At the rear there is a similar pair of crossed belts with a central loose sliding buckle intended to keep the belts mechanically connected to each other while allowing the belts to be freely tightened. A sensor mechanism is housed on the outside of this buckle. These belts have on one side a fixed connection to the waist and thigh belts and on the other side are connected to the same by pyrotechnic tensioning devices.
The rearward sensor is designed to detect any immanent collision and when it does so it fires the pyrotechnic tensioning devices. This instantly tightens the rear facing straps, compacts the buttocks, and thus prevents collisions between the buttocks and any fragile, frangible, or flaming objects in their path (e.g. cathode ray oscilloscopes).
A right to manufacture the BumbleButtBeltTM is hereby granted to any party who wishes to reduce the terrifying risks posed to the public every day by errant, poorly controlled buttocks.
Mandatory seat belt use became Federal law once, in 1974. Every new passenger vehicle sold in the USA had a starter interlock to prevent you from starting the car unless the driver and front passenger buckled their seat belt. The public outcry was so loud that the interlock was removed starting in 1975. And the interlock on the 1974 cars was easy to defeat.
As far as I know every state now requires mandatory seat belt use but there is no interlock. Just the reminder light on the dash and the nanny buzzer.
Here if Flori-DUH, we have lit signs on the sides of the roads that say, click it or ticket. They must have paid someone a crap pot of money to come up with that.
Very standard design akin to Thurlby / TTi and it is of the same heritage.
Hmm, that redhead looks familiar...
That redhead would look familiar to a lot of us. And she does.
Since I burned my fingers with the evil raspberries (I do not like them...) this time I ask before.
Are you happy with the ESP32 based boards? Is the ESP32 running stable for you? Can be used in production?´
Many thanks.
I’ve stayed away after reading horror stories. Things like crashes when you write to flash during interrupts, undocumented behaviour and the ADC sucking complete balls. However there are very few SoC at that level which have the out of box features you might need and you can actually still get the things.
Ergo I’d put the engineering hat on, write your feature requirements down, do a KT decision analysis against that and STM32 and see what comes out.
As for seatbelts, I only wear them on Mondays, Thursdays and occasionally Sundays *
* oh the power of carefully misstating positions
And then completely fail to find any stock of the STM32 model arrived at.
Actually, there are some relatively new STM32s with onboard wireless functions (if that's why the ESP32 is of interest) and they're new enough that few are actually being used in production, which means there is a little stock availability of them. However they are mostly dual core and rely on that for the wireless functionality, so there are many subtle synchronisation bugs awaiting the unwary embedded programmer who doesn't have a solid understanding of the same.
Many thanks to all you gang! As always it is beautiful to swim in this TEA pond.
For production I mean something that do not crash for unknown reasons and leave you with a sad monkey face.
Example for production level SW: FreeBSD, ZFS, just to understand what I am talking about.
I do not want cheap stuff, I want stuff that is reliable and don't care too much about money.
I do not want to touch thinker stuff anymore.
If I need to invest my time to learn new stuff, no problem but I do not want to be disappointed later.
Learning FreeBSD after many decades or windows was not easy but boy it was worth every single penny.
Basically I need just a µC to collect/process temperature and relative humidity and show them up in a display (touchy, why not? it will not used in a car).
Target is a dew point calculation, maybe with an air pressure sensor in the big picture.
I am in a very early design stage I just want to start with the right foot.
WIFI with async web services NICE TO HAVE, but I do not want to chose a wifi board which compromise the stability.
Learning MQTT right now, very interesting stuff, but I have no experience with it. Pondering to have a stupid (BUT REALIABLE) wifi board (looks like not ESP32) and move the horse power into the MQTT brocker/server.
Slightly off topic question, why it is so hard to find a RELIABLE SBC platform?
On The Bench This Morning: Aspire R5-471T UltraBook
...the only flaw in the thing is that the battery won't take a charge; probably the BMS in shutdown due to not being used for 5 years. I'm going to do some exploratory surgery; if the pack isn't puffy, I'll try and jump-start the cells using the ol' Lambda LQ-532...
I popped the cover off of the 4800A and took a few more pictures of it. Normal HP construction of the era - well laid out and easy to access, no surprises.
Other pics at: https://pmanning.smugmug.com/Electronics/HP-4800A-Vector-Impedance-Meter (Crappy iPad pics, at some point I'll take better ones with the DSLR)
-PatAre those PCBs only tin coated or is just the lighting/camera that make them look that way?
On my 4800A the PCBs are fully gold plated as was normal for HP equipment of that era.
What is this " Linear Technology " branded calculator sitting on top of the TE patient ?Swag from embedded world fair some years agoQuoteSome rebranded off the shelf (which one ?) calculator, or did LT ask Casio or TI or whoever, to make them a custom calculator with their own specs / features / looks ??
No, it's an off the shelf one with no special features. Not even one of the big brands, it says "abacus" on its back side. Rather a cheap look and feel knockoff from a Casio.
BTW: it has an "poke with a needle type" reset button on it's backside, and one needs to use that button sometimes WTF?
These are made by a company called Kinpo: https://www.kinpo.com.tw/en-US/products/consumer-electronics
The TI, Casio, basic HP, generic ones are all made using the same hardware platform and software these days. The only thing that is customised is the plastic and branding. The basic OS is pretty nice though to be honest.
BUT as you will find out they are generally garbage hardware quality. I actually had to run out yesterday and grab a replacement Casio FX991EX because the 4 and integral button stopped working on my eldest's calculator.
Why do you need a dual core 32 bit processor for that? An 8 bit PIC is more than capable.....
There is FreeBSD for Raspberry Pi.
Ok an actual TE post. Black Star Jupiter 2010 arrived. Looks in good condition, appears to actually work fine although I have nothing to check that available at the moment.
Outside:
Insides view 1:
Insides view 2:
Very standard design akin to Thurlby / TTi and it is of the same heritage.
Fridge repair
...
In the meantime I have to cycle the fridge/copressor on and off by hand to keep my food fresh..... old man says ratio is about a third to a fourth. So total run time per day / 24H must be 6 to 8H, something like that. So ideally turn it on 15 minutes then turn it off for 30 to 45 minutes. but that's too much work for me... I am no slave. So I guess it will be more like 1hour on and 2 or 3 hours off....
...