Mirosław Folejewski
@Mirko_DIY
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Hardware/PCB Designer, DIY Maker, Embedded, Carrier boards
Kraków, Polska
Joined June 2019
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Ultra-compact mini PC
PCB dimensions 62x62mm
GbE RJ45 + HDMI Type A, USB-C (power+data), 2x USB 2.0 Type A (host), 3.5mm jack (32bit, 384kHz DAC), microSD, power button (MCU controlled), M.2 slot (2230/2242), RTC + battery backup (CR1025).
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How old am I?
It was 1997 year, I was a poor boy, during my technical high school study I decided to build my first microprocessor system from scratch. Without a computer, the internet, or any PCB tool, only on paper, by hand.
I used Intel i8085 CPU, 5V, 8-bit CPU, and external
Any thoughts ?
Feel free to share
@dsp8bit
@aggarwal_pallav
@toybuilder
@elmundoverdees
@Mirko_DIY
@gsreynaga
@arturo182
@LuisLlamas
@evilgeniuslab
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nice and easy desoldering DDR socket using solder pot
source: PCB Hero
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Raspberry Pi 5 as a NAS?
Using such a tiny HAT it would be possible now.
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The question is:
"...but can it run Crysis?"
Raspberry Pi 5 + Upcity Lite + Radeon RX 6800 XT
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nice trick how to detect short circuit using thin rosin layer.
source: LinkedIn / PCB Hero.
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Finally, it has PCIe! 🔥
It's nice to see that the new Raspberry Pi finally has a PCIe interface (however attached to the FFC connector as an expansion port, not as a standard M.2 port).
Who might be interested in a dedicated M.2 adapter board for RPi 5?
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All right, now I have 14 GB RAM onboard, isn't it?
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I can't say that I'm proud of the fact that my designs are copied by the Chinese, but, interestingly, we were noticed by one of the largest Chinese electronics manufacturers.
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eMMC adapter for Raspberry Pi (highly reliable MicroSD card replacement) - one of our side projects.
Created especially for users which complains about storing Pi OS into uSD card.
Will it work? Let's find out...
Manual soldering of the BGA chip might be tricky (0.5mm pitch).
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Hundreds of PCBs are waiting for testing, packaging and shipping.
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In pursuit of perfection. It seems like a pedantic penchant for symmetry, but placing components (bypass capacitors) in this way speeds up the design and PCB layout.
The biggest challenge for QFN devices: component placement for single-side mounted PCBA.
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If you are a hardware designer all the PCB boards are open source.
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wow 😍
It looks like Raspberry Pi 5, but isn't.
The early stage of Pi5 with exposed PCIe x4 interface.
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PCB Tips & Tricks for Beginners.
You may encounter phrases during PCB manufacturing that you sometimes don't understand.
Here I have gathered a collection of the most frequently offered services, technologies, and objects that appear on PCB circuits.
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Do you know that quote: "640kB should be enough for anyone"?
What about designing PCB boards?
Isn't it true that a 2-layer PCB design should be enough for anybody?
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What is more interesting, they designed a special Southbridge chip (RP1), as the GbE, USB3, and GPIO controller.
There is also a dedicated hard-coded MEMORY jumper for selecting embedded RAM (1-2-4-8G).
Still 8GB RAM only?
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A quick preview of the M.2 HAT (TOP) setup from our development:
*
@PineberryPi
TM1S board with installed NVMe SSD drive (M-key, 2242 size)
*
@Raspberry_Pi
5 4GB RAM
*
@PineberryPi
FPC PCIe cable, 40mm
* set of 14mm metal standoffs
* M2.5 screws
* 2X20P male-female pin header
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If you have too many spare microsd cards, you can build a SATA ssd drive using this adapter (build-in RAID0).
Looks a bit funny 🤩
2nd picture -> adapter for assembly eMMC BGA153 memory chips.
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We are thrilled to announce that today we launched a new brand in the Embedded industry: meet Pineberry Pi!
Introducing HatDrive by Pineberry Pi, the first
@Raspberry_Pi
Pi5 board with NVMe GEN3 support!
Two variants now available for pre-order. Be among the first 5000! Shipping starts early December 2023.
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Raspberry Pi 5 eMMC adapter (microSD card replacement) - now it's time for bring-up and testing
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PCB: tips & tricks
If you have any tracks or vias underneath metal parts of the connectors, you can place in this area extra silkscreen rectangle to protect and mask copper objects located under the connector (just in case).
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Sneak peek of my next PCB project during development (test setup).
Implemented: PCIe Gen2 x4 edge connector, GbE, HDMI 2.0, 2x USB 2.0, 12VDC (up to 8A).
Project will published as OSHW (next year).
PCB dimensions: 100 x 161.80mm (golden ratio).
4-layer PCB.
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We are thrilled to announce our new product - HatDrive! Piano - M.2 socket (2230/2242 size, M-key) combined with high-quality DAC audio card (32-bit/384kHz) with embedded headphone amplifier (I2C controlled).
As you probably know the new Raspberry Pi 5 does not have a dedicated
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I'm not sure if you noticed that on the top side of the PCB, right next to the LPDDR4X memory, there is a series of resistors that create a simple voltage divider.
@Raspberry_Pi
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[1/3]
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"What are you playing this night?" 💻🕹️
"They call it: PCB editor"
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Sooner or later everyone makes such mistake
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too much connectors will kill you :)
during designing hw concept of some industrial router
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Last Saturday (11th November), in Poland we celebrated Independence Day.
I'm proud that I live here, in Kraków, and create hardware projects at Mirkotronics.
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Another interesting, potential HAT board would be 2xGbE (or 1x 2.5G) + M.2 for building routers or any other network-attached devices.
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It's nice to see the real Raspberry Pi factory during manufacturing process, especially: Pick&Place machines, solder paste printing, selective soldering, automated THT placement (robot line), AOI inspection, testing, fixtures, etc.
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"AI will take my job away soon"
Meanwhile, AI is starting on the PCB design...
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Oh well, looks like I'll have to finish this DIY project before some Asian company outdoes me.
Thank you
@tomshardware
for mentioning my design concept. I appreciate that!
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Solder party begun!
It can be a challenge to properly align the BGA chip, so let's try to get it right the first time.
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I know that sounds a bit crazy, but now it could be also possible to build a compact, 4-port PCIe HAT.
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Yeah! Almost finished! My very first MiniPC project based on the CM4 module.
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Hardware designing often involves using previously created functional blocks (ReUse) and skillfully combining them into a logically connected whole.
In many future projects, I use part of the diagram circuits from my open HW designs, e.g. MirkoPC, Pi4GPU, Carduino Pi, or FinixPC
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BitPiRat - dedicated hardware for full node bitcoin and lightning network based on the Raspberry Pi Compute Module 4 (CM4).
Donate to me if you would like to support this project and help me to work on hardware development.
#BitPiRat
#RasberryPi
#CM4
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Which Gerber viewer (CAM tool) do you use for visual inspection before you send the manufacturing files to your PCB fabricator?
Personally, the most I use ViewMate and DFM Now! (free version of FAB3000) for reviewing Gerber layers, NC drills, and ODB++ data sets.
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PCIe x1 to M.2 adapter, now with support 2230/2242/2280
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Shared vias - nice trick for placing via stitching during changing layers in routing differential pairs.
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Let's go back to the PCB designs and hardware bring-up.
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The end of the year is a very intense period for us, new PCB designs, shipping a huge number of orders, brand building, store service, community support, etc.
Many challenges, a lot of work, but also a lot of satisfaction with the effect achieved.
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the new era has begun!
let's have some fun 🎃🔥
We registered a new hardware company with
@Mirko_DIY
today.
We are both broke(very very broke), excited and can’t wait to share our products with the community.
You’ll hear much more in a month or so, we are dealing with the production hell now.
What a crazy year for me 🔥
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It looks like we missed a nice anniversary.
3 years ago (19.01.2023) Compute Module 4 was introduced on the market, and it seems it changed quite a lot in the SBC/SOM market.
[1/2]
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Sometimes when you have no choice (because changing the technology to HDI or adding 2 more layers is too expensive) you have to use the "spider web".
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Our new office and warehouse are under construction.
As you can see, we work hard to create comfortable conditions for the R&D environment and logistics.
Today we spent 14 hours working all day on assembling furniture and shelves, so we apologize that we are offline and do not
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We are not slowing down, the next few days mean intensive design and implementation of new ideas for me.
Here you can take a behind-the-scenes look at the creation of the new HW structure.
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A few nice OSHW projects designed using EasyEDA for embedded Linux:
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A dedicated card for the
@Raspberry_Pi
CM4-IO board
PCI Express x1 to M.2 2280 M-Key (PCIe NVMe) Adapter
#CM4
#PCB
#RaspberryPi
#PCIE
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a nice feature if you would like to inform the user about the assembly variant
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Solder thieves (or traps) for wave soldering.
I must admit that I haven't seen them for a long time on the PCBs.
Here is a good example of such spots.
They even added extra silkscreen bridges between THT pads to improve soldering process.
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"DESIGNED IN POLAND" logo during development.
First attempt.
Because I'm proud I'm from Poland 🇵🇱
Do you like it?
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Every revolution needs sacrifice
If you don't have an office, you have to rent an apartment
If you don't have a logistics, production, or warehouse, you can do everything yourself
Even if you don't have $ in your account, you might invest your savings or borrow from family
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It's time for soldering...
We are not slowing down, we are working hard on new products.
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Less known facts about Raspberry Pi SBCs:
1. Raspberry uses OSP plating for finishing the PCBs
2. For inserting THT parts in the PCB: in the past, they use manual placing (for a long time by workers) and automated assembly line based on the co-robots (e.g. for Model 4B)
[1/3]
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OK, I updated the Raspberry Pi bootloader (now it is 5th Feb 2024 version).
I removed the micro SD card and... the Polish flag appeared on my screen 🇵🇱
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Guess which dot is the pin 1 marking...
Sometimes IC chip marking can cause confusing during mass production
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Reverse engineering using KiCad 7.0 for creating missing 3D STEP model
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Looks pretty neat, but still some changes are requried.
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"...but can you play Doom on it?"
Yes, it CAN!
Meet tiny RP2040 PC with microsd card, QSPI 8MB RAM, hi-end 32bit/384kHz audio DAC, VGA video out, USB-A/USB-C, RTC, RGB backlight and much more... Design based on
#Femto
module.
During DIY dev.
#FinixPC
@Raspberry_Pi
@TheMagPi
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The next PCB board is under development.
I am not a supporter of using autoruters and I hope that AI algorithms will not be able to design PCB mosaics at the level of an experienced designer for a long time.
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I'm happy that I can officially mark my
#MirkoPC
boards with official marking "Powered By Raspberry Pi".
@Raspberry_Pi
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PCBShopper - a not very well-known service for comparing prices of PCB production and PCBA assembly (the database contains mainly Chinese manufacturers).
A good source if you would like to test or discover your next PCB factory (for the geeks).
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so... I will not fix your TV, mobile phone or fridge :-)
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#MirkoPC
REV1.1 today released.
The project is already during manufacturing and assembly.
Main features and updates (compared to R1.0):
- new power button (slide switch) controlled by MCU,
- added 2 fan sockets,
- new microSD slot location,
- improved 5V power rail,
- marking.
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Milk-V Mars CM - CM4 compatible module (RISC-V)
StarFive JH7110 64bit SoC with RV64GC, up to 1.5GHz
LPDDR4 2/4/8GB
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It was a very stressful month for me, as HW / PCB Designer, awaiting PCB panels.
Today we finally received packages with PCB boards.
I breathed in the relief.
Keep your fingers crossed for our manufacturing, in a short time we enter the factory to assemble SMT.
cc
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🤣
It's a fish?
No!
That's one more Raspberry Pi NVMe HAT!
It definitely has a unique design due to the shape of the PCB.
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Added the Lightning network and the BTC symbols.
Just for fun...
Like or dislike?
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Today we introduced HatDrive! AI Coral Edge TPU Bundle 🔥👀
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The new chips - WCH341A for building my custom EEPROM programmer
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I'm looking for a cheaper replacement for INA219 - I2C current/voltage monitor/measurement system.
Do you know any cheaper/similar IC family?
There will be a prize for the winner 🏆
CC:
@aggarwal_pallav
@sad_electronics
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It's time to take a closer look at the MiniPCIe standard and to figure out how to implement it in Embedded systems.
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No more soldering of the M.2 standoff, so you can quickly change the NVMe slot size (between 2230/2242/2280).
Your SSD drive is easily accessible (by M2 screw), so changing to another model is also instant.
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The wait is finally over - we’re launching our Ai Bundle with the Hailo 8L AI accelerator today! 🎇🔥
It is fully compatible with software/documentation you know from the official Ai Kit and it gives you the ability to boot from NVMe 🥳
more:
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I'm a bit confused seeing such extra AC-coupling capacitors added on the PCIe interface somwhere, not only on TX side (M.2 HAT is just a passive riser board).
Perhaps added them 'just in case' or without detailed reading and implementing the PCIe standard.
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