Groups > sci.electronics.design > #519151 > unrolled thread

3 cent microcontroller

Started by	Klaus Kragelund <klauskvik@hotmail.com>
First post	2018-10-13 03:10 -0700
Last post	2018-10-19 20:41 -0700
Articles	20 on this page of 38 — 12 participants

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  3 cent microcontroller Klaus Kragelund <klauskvik@hotmail.com> - 2018-10-13 03:10 -0700
    3 cent microcontroller Klaus Kragelund <klauskvik@hotmail.com> - 2018-10-13 06:02 -0700
      Re: 3 cent microcontroller Winfield Hill <hill@rowland.harvard.edu> - 2018-10-13 07:43 -0700
        Re: 3 cent microcontroller David Brown <david.brown@hesbynett.no> - 2018-10-15 09:59 +0200
          Re: 3 cent microcontroller Klaus Kragelund <klauskvik@hotmail.com> - 2018-10-15 01:00 -0700
            Re: 3 cent microcontroller David Brown <david.brown@hesbynett.no> - 2018-10-15 10:31 +0200
              Re: 3 cent microcontroller Klaus Kragelund <klauskvik@hotmail.com> - 2018-10-15 05:06 -0700
                Re: 3 cent microcontroller David Brown <david.brown@hesbynett.no> - 2018-10-15 14:44 +0200
                  Re: 3 cent microcontroller Klaus Kragelund <klauskvik@hotmail.com> - 2018-10-15 07:00 -0700
                  Re: 3 cent microcontroller Klaus Kragelund <klauskvik@hotmail.com> - 2018-10-15 07:04 -0700
                  Re: 3 cent microcontroller Clifford Heath <no.spam@please.net> - 2018-10-16 10:34 +1100
                    Re: 3 cent microcontroller David Brown <david.brown@hesbynett.no> - 2018-10-16 15:02 +0200
                      Re: 3 cent microcontroller <698839253X6D445TD@nospam.org> - 2018-10-16 17:14 +0000
                      Re: 3 cent microcontroller Klaus Kragelund <klauskvik@hotmail.com> - 2018-10-20 05:16 -0700
    Re: 3 cent microcontroller bitrex <user@example.net> - 2018-10-13 11:17 -0400
      Re: 3 cent microcontroller Winfield Hill <hill@rowland.harvard.edu> - 2018-10-13 10:26 -0700
        Re: 3 cent microcontroller boB <boB@K7IQ.com> - 2018-10-13 11:45 -0700
          Re: 3 cent microcontroller Klaus Kragelund <klauskvik@hotmail.com> - 2018-10-13 12:31 -0700
            Re: 3 cent microcontroller Tim <cpldcpu+usenet@gmail.com> - 2018-10-14 10:57 +0200
        Re: 3 cent microcontroller bitrex <user@example.net> - 2018-10-13 15:38 -0400
          Re: 3 cent microcontroller Klaus Kragelund <klauskvik@hotmail.com> - 2018-10-13 14:16 -0700
            Re: 3 cent microcontroller bitrex <user@example.net> - 2018-10-13 22:53 -0400
            Re: 3 cent microcontroller bill.sloman@ieee.org - 2018-10-13 20:02 -0700
            Re: 3 cent microcontroller gnuarm.deletethisbit@gmail.com - 2018-10-13 20:40 -0700
              Re: 3 cent microcontroller bitrex <user@example.net> - 2018-10-14 00:06 -0400
            Re: 3 cent microcontroller Tim <cpldcpu+usenet@gmail.com> - 2018-10-14 12:34 +0200
              Re: 3 cent microcontroller Klaus Kragelund <klauskvik@hotmail.com> - 2018-10-14 15:37 -0700
                Re: 3 cent microcontroller Tim <cpldcpu+usenet@gmail.com> - 2018-10-15 19:57 +0200
                  Re: 3 cent microcontroller Klaus Kragelund <klauskvik@hotmail.com> - 2018-10-15 13:44 -0700
                    Re: 3 cent microcontroller gnuarm.deletethisbit@gmail.com - 2018-10-15 21:07 -0700
    Re: 3 cent microcontroller speff <spehro@gmail.com> - 2018-10-18 01:08 -0700
      Re: 3 cent microcontroller gnuarm.deletethisbit@gmail.com - 2018-10-18 08:24 -0700
        Re: 3 cent microcontroller speff <spehro@gmail.com> - 2018-10-18 10:05 -0700
          Re: 3 cent microcontroller gnuarm.deletethisbit@gmail.com - 2018-10-18 11:29 -0700
            Re: 3 cent microcontroller speff <spehro@gmail.com> - 2018-10-19 08:05 -0700
              Re: 3 cent microcontroller gnuarm.deletethisbit@gmail.com - 2018-10-19 09:02 -0700
                Re: 3 cent microcontroller Jasen Betts <jasen@xnet.co.nz> - 2018-10-20 00:47 +0000
                  Re: 3 cent microcontroller gnuarm.deletethisbit@gmail.com - 2018-10-19 20:41 -0700

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#519151 — 3 cent microcontroller

From	Klaus Kragelund <klauskvik@hotmail.com>
Date	2018-10-13 03:10 -0700
Subject	3 cent microcontroller
Message-ID	<858164b4-2bc1-419d-9f80-37fb4ba08c4e@googlegroups.com>

Amazingly, there is such a thing as a microcontroller that goes for less than a dirt cheap logic IC

3 cents in volume:

https://www.youtube.com/watch?v=VYhAGnsnO7w

Cheers 

Klaus

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#519157

From	Klaus Kragelund <klauskvik@hotmail.com>
Date	2018-10-13 06:02 -0700
Message-ID	<461f3ec1-bb2c-41e0-893c-e1c05ba88328@googlegroups.com>
In reply to	#519151

Dealer site:

https://lcsc.com/search?q=Microcontroller

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#519161

From	Winfield Hill <hill@rowland.harvard.edu>
Date	2018-10-13 07:43 -0700
Message-ID	<ppt0a402qn5@drn.newsguy.com>
In reply to	#519157

Klaus Kragelund wrote...
>
> Dealer site:
> https://lcsc.com/search?q=Microcontroller

 I found a critical Chinese part at LCSC, that's not available
 from the usual suppliers, for 30 cents each, and LCSC shipped
 100 pieces by some type of DHL service, for only $10, and they
 arrived in four days.  Awesome!


-- 
 Thanks,
    - Win

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#519336

From	David Brown <david.brown@hesbynett.no>
Date	2018-10-15 09:59 +0200
Message-ID	<pq1hc8$4l2$2@dont-email.me>
In reply to	#519161

On 13/10/18 16:43, Winfield Hill wrote:
> Klaus Kragelund wrote...
>>
>> Dealer site:
>> https://lcsc.com/search?q=Microcontroller
> 
>  I found a critical Chinese part at LCSC, that's not available
>  from the usual suppliers, for 30 cents each, and LCSC shipped
>  100 pieces by some type of DHL service, for only $10, and they
>  arrived in four days.  Awesome!
> 

If you are happy to go up to $0.30 rather than $0.03, then you can get
ARM Cortex-M0 parts from NXP and other more mainstream suppliers.

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#519337

From	Klaus Kragelund <klauskvik@hotmail.com>
Date	2018-10-15 01:00 -0700
Message-ID	<20c94e1d-0f91-4c53-8b3b-d057ac72feea@googlegroups.com>
In reply to	#519336

On Monday, October 15, 2018 at 9:59:07 AM UTC+2, David Brown wrote:
> On 13/10/18 16:43, Winfield Hill wrote:
> > Klaus Kragelund wrote...
> >>
> >> Dealer site:
> >> https://lcsc.com/search?q=Microcontroller
> > 
> >  I found a critical Chinese part at LCSC, that's not available
> >  from the usual suppliers, for 30 cents each, and LCSC shipped
> >  100 pieces by some type of DHL service, for only $10, and they
> >  arrived in four days.  Awesome!
> > 
> 
> If you are happy to go up to $0.30 rather than $0.03, then you can get
> ARM Cortex-M0 parts from NXP and other more mainstream suppliers.

If I was able to go up, I could choose the Silabs EFM8BB1 or ATTiny, they both come in at about 15 US cents, half that of the Cortex M0+ devices

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#519343

From	David Brown <david.brown@hesbynett.no>
Date	2018-10-15 10:31 +0200
Message-ID	<pq1j9s$kn4$1@dont-email.me>
In reply to	#519337

On 15/10/18 10:00, Klaus Kragelund wrote:
> On Monday, October 15, 2018 at 9:59:07 AM UTC+2, David Brown wrote:
>> On 13/10/18 16:43, Winfield Hill wrote:
>>> Klaus Kragelund wrote...
>>>> 
>>>> Dealer site: https://lcsc.com/search?q=Microcontroller
>>> 
>>> I found a critical Chinese part at LCSC, that's not available 
>>> from the usual suppliers, for 30 cents each, and LCSC shipped 100
>>> pieces by some type of DHL service, for only $10, and they 
>>> arrived in four days.  Awesome!
>>> 
>> 
>> If you are happy to go up to $0.30 rather than $0.03, then you can
>> get ARM Cortex-M0 parts from NXP and other more mainstream
>> suppliers.
> 
> If I was able to go up, I could choose the Silabs EFM8BB1 or ATTiny,
> they both come in at about 15 US cents, half that of the Cortex M0+
> devices
> 

There is a vast difference in the quality of the cpu core between these
two chips and the M0, if that is important to you.

Since you also mentioned ASICs, Atmel (now owned by Microchip) will do
you ASICs with AVR cores in them.  But I imagine you know that already.

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#519361

From	Klaus Kragelund <klauskvik@hotmail.com>
Date	2018-10-15 05:06 -0700
Message-ID	<65c7e3d0-b848-43dc-9154-c3adf364ef47@googlegroups.com>
In reply to	#519343

On Monday, October 15, 2018 at 10:32:00 AM UTC+2, David Brown wrote:
> On 15/10/18 10:00, Klaus Kragelund wrote:
> > On Monday, October 15, 2018 at 9:59:07 AM UTC+2, David Brown wrote:
> >> On 13/10/18 16:43, Winfield Hill wrote:
> >>> Klaus Kragelund wrote...
> >>>> 
> >>>> Dealer site: https://lcsc.com/search?q=Microcontroller
> >>> 
> >>> I found a critical Chinese part at LCSC, that's not available 
> >>> from the usual suppliers, for 30 cents each, and LCSC shipped 100
> >>> pieces by some type of DHL service, for only $10, and they 
> >>> arrived in four days.  Awesome!
> >>> 
> >> 
> >> If you are happy to go up to $0.30 rather than $0.03, then you can
> >> get ARM Cortex-M0 parts from NXP and other more mainstream
> >> suppliers.
> > 
> > If I was able to go up, I could choose the Silabs EFM8BB1 or ATTiny,
> > they both come in at about 15 US cents, half that of the Cortex M0+
> > devices
> > 
> 
> There is a vast difference in the quality of the cpu core between these
> two chips and the M0, if that is important to you.
> 

By quality, do you mean the Field Failure Rate of the die? I do not expect an ARM device with many more transistors to have less failure rate....

Cheers

Klaus

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#519371

From	David Brown <david.brown@hesbynett.no>
Date	2018-10-15 14:44 +0200
Message-ID	<pq223b$amh$1@dont-email.me>
In reply to	#519361

On 15/10/18 14:06, Klaus Kragelund wrote:
> On Monday, October 15, 2018 at 10:32:00 AM UTC+2, David Brown wrote:
>> On 15/10/18 10:00, Klaus Kragelund wrote:
>>> On Monday, October 15, 2018 at 9:59:07 AM UTC+2, David Brown
>>> wrote:
>>>> On 13/10/18 16:43, Winfield Hill wrote:
>>>>> Klaus Kragelund wrote...
>>>>>> 
>>>>>> Dealer site: https://lcsc.com/search?q=Microcontroller
>>>>> 
>>>>> I found a critical Chinese part at LCSC, that's not available
>>>>>  from the usual suppliers, for 30 cents each, and LCSC
>>>>> shipped 100 pieces by some type of DHL service, for only $10,
>>>>> and they arrived in four days.  Awesome!
>>>>> 
>>>> 
>>>> If you are happy to go up to $0.30 rather than $0.03, then you
>>>> can get ARM Cortex-M0 parts from NXP and other more mainstream 
>>>> suppliers.
>>> 
>>> If I was able to go up, I could choose the Silabs EFM8BB1 or
>>> ATTiny, they both come in at about 15 US cents, half that of the
>>> Cortex M0+ devices
>>> 
>> 
>> There is a vast difference in the quality of the cpu core between
>> these two chips and the M0, if that is important to you.
>> 
> 
> By quality, do you mean the Field Failure Rate of the die? I do not
> expect an ARM device with many more transistors to have less failure
> rate....
> 

No, I mean whether your programmers will say "this is a nice core to
work with" (the M0), "this is a bit odd and inefficient for some things,
but not too bad" (the AVR core in the ATTiny), or "this is a hideous
monster and should have been strangled at birth some 30+ years ago" (the
8051 core in the EFM8BB1).

Of course, for a small enough program and high enough volume, no one
will listen to the programmers' complaints :-)

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#519382

From	Klaus Kragelund <klauskvik@hotmail.com>
Date	2018-10-15 07:00 -0700
Message-ID	<f4181065-1e8c-4a9a-a34b-eeb30da36337@googlegroups.com>
In reply to	#519371

On Monday, October 15, 2018 at 2:44:33 PM UTC+2, David Brown wrote:
> On 15/10/18 14:06, Klaus Kragelund wrote:
> > On Monday, October 15, 2018 at 10:32:00 AM UTC+2, David Brown wrote:
> >> On 15/10/18 10:00, Klaus Kragelund wrote:
> >>> On Monday, October 15, 2018 at 9:59:07 AM UTC+2, David Brown
> >>> wrote:
> >>>> On 13/10/18 16:43, Winfield Hill wrote:
> >>>>> Klaus Kragelund wrote...
> >>>>>> 
> >>>>>> Dealer site: https://lcsc.com/search?q=Microcontroller
> >>>>> 
> >>>>> I found a critical Chinese part at LCSC, that's not available
> >>>>>  from the usual suppliers, for 30 cents each, and LCSC
> >>>>> shipped 100 pieces by some type of DHL service, for only $10,
> >>>>> and they arrived in four days.  Awesome!
> >>>>> 
> >>>> 
> >>>> If you are happy to go up to $0.30 rather than $0.03, then you
> >>>> can get ARM Cortex-M0 parts from NXP and other more mainstream 
> >>>> suppliers.
> >>> 
> >>> If I was able to go up, I could choose the Silabs EFM8BB1 or
> >>> ATTiny, they both come in at about 15 US cents, half that of the
> >>> Cortex M0+ devices
> >>> 
> >> 
> >> There is a vast difference in the quality of the cpu core between
> >> these two chips and the M0, if that is important to you.
> >> 
> > 
> > By quality, do you mean the Field Failure Rate of the die? I do not
> > expect an ARM device with many more transistors to have less failure
> > rate....
> > 
> 
> No, I mean whether your programmers will say "this is a nice core to
> work with" (the M0), "this is a bit odd and inefficient for some things,
> but not too bad" (the AVR core in the ATTiny), or "this is a hideous
> monster and should have been strangled at birth some 30+ years ago" (the
> 8051 core in the EFM8BB1).
> 
> Of course, for a small enough program and high enough volume, no one
> will listen to the programmers' complaints :-)

We have high volume, so the programmer can complain all he wants, HW rules

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#519383

From	Klaus Kragelund <klauskvik@hotmail.com>
Date	2018-10-15 07:04 -0700
Message-ID	<396022b1-0105-43be-b7cf-9859c04d7617@googlegroups.com>
In reply to	#519371

On Monday, October 15, 2018 at 2:44:33 PM UTC+2, David Brown wrote:
> On 15/10/18 14:06, Klaus Kragelund wrote:
> > On Monday, October 15, 2018 at 10:32:00 AM UTC+2, David Brown wrote:
> >> On 15/10/18 10:00, Klaus Kragelund wrote:
> >>> On Monday, October 15, 2018 at 9:59:07 AM UTC+2, David Brown
> >>> wrote:
> >>>> On 13/10/18 16:43, Winfield Hill wrote:
> >>>>> Klaus Kragelund wrote...
> >>>>>> 
> >>>>>> Dealer site: https://lcsc.com/search?q=Microcontroller
> >>>>> 
> >>>>> I found a critical Chinese part at LCSC, that's not available
> >>>>>  from the usual suppliers, for 30 cents each, and LCSC
> >>>>> shipped 100 pieces by some type of DHL service, for only $10,
> >>>>> and they arrived in four days.  Awesome!
> >>>>> 
> >>>> 
> >>>> If you are happy to go up to $0.30 rather than $0.03, then you
> >>>> can get ARM Cortex-M0 parts from NXP and other more mainstream 
> >>>> suppliers.
> >>> 
> >>> If I was able to go up, I could choose the Silabs EFM8BB1 or
> >>> ATTiny, they both come in at about 15 US cents, half that of the
> >>> Cortex M0+ devices
> >>> 
> >> 
> >> There is a vast difference in the quality of the cpu core between
> >> these two chips and the M0, if that is important to you.
> >> 
> > 
> > By quality, do you mean the Field Failure Rate of the die? I do not
> > expect an ARM device with many more transistors to have less failure
> > rate....
> > 
> 
> No, I mean whether your programmers will say "this is a nice core to
> work with" (the M0), "this is a bit odd and inefficient for some things,
> but not too bad" (the AVR core in the ATTiny), or "this is a hideous
> monster and should have been strangled at birth some 30+ years ago" (the
> 8051 core in the EFM8BB1).
> 
> Of course, for a small enough program and high enough volume, no one
> will listen to the programmers' complaints :-)

We have high volume, the programmers can complain all they want - in this case HW rules

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#519421

From	Clifford Heath <no.spam@please.net>
Date	2018-10-16 10:34 +1100
Message-ID	<8u9xD.295577$sO2.263430@fx41.iad>
In reply to	#519371

On 15/10/18 23:44, David Brown wrote:
> No, I mean whether your programmers will say "this is a nice core to
> work with" (the M0), "this is a bit odd and inefficient for some things,
> but not too bad" (the AVR core in the ATTiny), or "this is a hideous
> monster and should have been strangled at birth some 30+ years ago" (the
> 8051 core in the EFM8BB1).

It's noteworthy that you didn't even invoke the demon PIC12... :)

Clifford Heath.

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#519474

From	David Brown <david.brown@hesbynett.no>
Date	2018-10-16 15:02 +0200
Message-ID	<pq4nhp$4p2$1@dont-email.me>
In reply to	#519421

On 16/10/18 01:34, Clifford Heath wrote:
> On 15/10/18 23:44, David Brown wrote:
>> No, I mean whether your programmers will say "this is a nice core to
>> work with" (the M0), "this is a bit odd and inefficient for some things,
>> but not too bad" (the AVR core in the ATTiny), or "this is a hideous
>> monster and should have been strangled at birth some 30+ years ago" (the
>> 8051 core in the EFM8BB1).
> 
> It's noteworthy that you didn't even invoke the demon PIC12... :)
> 

Just be careful not to say its name three times in a row!

Klaus had given an ATTiny and an 8051 device as alternative choices for
cheap microcontrollers.  Maybe the PIC12 is more expensive than them -
or maybe he /does/ have some sympathy for his programmers after all :-)

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#519499

From	<698839253X6D445TD@nospam.org>
Date	2018-10-16 17:14 +0000
Message-ID	<pq56bn$186l$1@gioia.aioe.org>
In reply to	#519474

David Brown wrote
>Klaus had given an ATTiny and an 8051 device as alternative choices for
>cheap microcontrollers.  Maybe the PIC12 is more expensive than them -
>or maybe he /does/ have some sympathy for his programmers after all :-)

That 12F has other virtues you do not so easily find in other micros:
 
;                                                wms-0.1.asm
;                                      Copyright (c) Jan Panteltje 2010-always.
;
; Temperature controller / thermostat replacement for Zanussi 913 washing machine.
; The original sensor has one make contact at 40 C that is in series with the mechanical timer clock, and one break contact at 90 C that is in series with the heating element.
; wms.asm for Microchip 12F629.
; From  Microchhip program: TSTAT2~1.ASM. modified for RS232 ASCII out and PIC 12F629.
; see Microchip application notes 00720c.pdf (temp sensor using watch dog timer), and 00510e.pdf (for software serial out).


Fixed old washing machine with it...

Not hard to program at all.

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#519983

From	Klaus Kragelund <klauskvik@hotmail.com>
Date	2018-10-20 05:16 -0700
Message-ID	<7228ea70-21fc-48e6-91db-c50d025873cd@googlegroups.com>
In reply to	#519474

On Tuesday, October 16, 2018 at 3:02:54 PM UTC+2, David Brown wrote:
> On 16/10/18 01:34, Clifford Heath wrote:
> > On 15/10/18 23:44, David Brown wrote:
> >> No, I mean whether your programmers will say "this is a nice core to
> >> work with" (the M0), "this is a bit odd and inefficient for some things,
> >> but not too bad" (the AVR core in the ATTiny), or "this is a hideous
> >> monster and should have been strangled at birth some 30+ years ago" (the
> >> 8051 core in the EFM8BB1).
> > 
> > It's noteworthy that you didn't even invoke the demon PIC12... :)
> > 
> 
> Just be careful not to say its name three times in a row!
> 
> Klaus had given an ATTiny and an 8051 device as alternative choices for
> cheap microcontrollers.  Maybe the PIC12 is more expensive than them -
> or maybe he /does/ have some sympathy for his programmers after all :-)

The quotes we have gotten for the PIC series were above the Silabs and ATTiny parts. So no need to push the PIC onto programmers :-)

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#519162

From	bitrex <user@example.net>
Date	2018-10-13 11:17 -0400
Message-ID	<D0owD.121099$ZJ2.32782@fx33.iad>
In reply to	#519151

On 10/13/2018 06:10 AM, Klaus Kragelund wrote:
> Amazingly, there is such a thing as a microcontroller that goes for less than a dirt cheap logic IC
> 
> 3 cents in volume:
> 
> https://www.youtube.com/watch?v=VYhAGnsnO7w
> 
> Cheers
> 
> Klaus
> 

I was looking for a uP small and dirt cheap enough to put in a 
micro-server project where the enclosure will not be much larger than 
the total size of a desktop PC Ethernet port's through-hole housing and 
these seem to fit the bill exactly!

I bet there's not much chance of it going EOL soon by the look of things 
either hundreds and hundreds of thousands available that is _remarkable_

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#519168

From	Winfield Hill <hill@rowland.harvard.edu>
Date	2018-10-13 10:26 -0700
Message-ID	<ppt9s20a3i@drn.newsguy.com>
In reply to	#519162

bitrex wrote...
>
> I was looking for a uP small and dirt cheap 

 Why does it have to be dirt cheap?


-- 
 Thanks,
    - Win

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#519177

From	boB <boB@K7IQ.com>
Date	2018-10-13 11:45 -0700
Message-ID	<e9f4sd1aic7pgjsk0nfulmegcut4dmf1ei@4ax.com>
In reply to	#519168

On 13 Oct 2018 10:26:26 -0700, Winfield Hill
<hill@rowland.harvard.edu> wrote:

>bitrex wrote...
>>
>> I was looking for a uP small and dirt cheap 
>
> Why does it have to be dirt cheap?

For things like $1.00 toys I guess

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#519180

From	Klaus Kragelund <klauskvik@hotmail.com>
Date	2018-10-13 12:31 -0700
Message-ID	<787fe3f6-4e56-48e5-b9de-84a020cf6615@googlegroups.com>
In reply to	#519177

https://lcsc.com/product-detail/Microprocessor-Microcontroller_Bojuxing-Industry-BJ8P509FNB_C83513.html

1kW OTP micro, 3 cents

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#519242

From	Tim <cpldcpu+usenet@gmail.com>
Date	2018-10-14 10:57 +0200
Message-ID	<ppv0ed$qc1$1@dont-email.me>
In reply to	#519180

On 10/13/2018 09:31 PM, Klaus Kragelund wrote:
> https://lcsc.com/product-detail/Microprocessor-Microcontroller_Bojuxing-Industry-BJ8P509FNB_C83513.html
> 
> 1kW OTP micro, 3 cents
> 

The manufacturers homepage is http://www.bjxmcu.com

No update since 2016. Most of the press releases on their homepage 
mention government incentives, so it seems doubtful that this ever has 
been a functioning business.

Looks like they are defunct.

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#519181

From	bitrex <user@example.net>
Date	2018-10-13 15:38 -0400
Message-ID	<jRrwD.43812$mJ1.5677@fx24.iad>
In reply to	#519168

On 10/13/2018 01:26 PM, Winfield Hill wrote:
> bitrex wrote...
>>
>> I was looking for a uP small and dirt cheap
> 
>   Why does it have to be dirt cheap?
> 
> 

that was the joke, son. :|

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3 cent microcontroller

Contents

#519151 — 3 cent microcontroller

#519157

#519161

#519336

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