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- เผยแพร่เมื่อ 14 พ.ค. 2024
- Which battery operated power supply is best for our project? In this video, I have ten boards for the Raspberry Pi, as well as for Arduino, ESP, and STM32 boards. We will compare their features, find out the differences, and test them. Because of the test results, we will not stop there. We will design our own “SuperPower” branded battery power supply.
I am a proud Patreon of @greatscottlab , @ElectroBOOM , @ELECTRONOOBS , @EEVblog , and others
No Docker, Microsoft Teams, Zoom
Discord Channel: / discord
Google Drive Project files: drive.google.com/drive/folder...
GitHub: github.com/SensorsIot/SuperPower
Links:
Superpower Project: superpower.github.io/
Single 18650: s.click.aliexpress.com/e/_Bfh...
Single 16340: s.click.aliexpress.com/e/_dSX...
T-Bat: s.click.aliexpress.com/e/_d7C...
Two cells: s.click.aliexpress.com/e/_dZS...
Two cells 16340: s.click.aliexpress.com/e/_dWT...
Raspberry Pi shield old: s.click.aliexpress.com/e/_dYH...
Raspberry Pi shield new: s.click.aliexpress.com/e/_dSA...
Mega: s.click.aliexpress.com/e/_d8s...
Four cells: s.click.aliexpress.com/e/_d8f...
Info about TP4056: www.tp4056.com/
Data sheets:
FP6298: www.feeling-tech.com.tw/km-mas...
CN3065: datasheetspdf.com/pdf-file/12...
TP5000: pdf.voron.ua/files/pdf/Micros...
TP5602: www.crossic.com/documents/TP56...
AP2016: www.zm699.com/Products/10agglm...
MT3608 www.olimex.com/Products/Bread...
IP5306: www.injoinic.com/wwwroot/uploa...
The links above usually are affiliate links which support the channel (no additional cost for you).
Supporting Material and Blog Page: www.sensorsiot.org
Github: www.github.com/sensorsiot
My Patreon Page: / andreasspiess
Discord: / discord
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Please put your requirements into the project lists (and check before, maybe they are already there): drive.google.com/drive/folders/1f19RF6AQi-4VBvSjyZpHFr3eIGdKw_Vn?usp=sharing
Useful chips belong here: drive.google.com/drive/folders/1EVSzTGi6zV_2XqgAnM31S37PE2n4OdgO?usp=sharing
It's not cheap, but I think most of what you want is on this board. "SparkFun Battery Babysitter - LiPo Battery Manager" th-cam.com/video/u3KjOxiETWU/w-d-xo.html&feature=emb_logo
@@aGGreSSiv No 5v boost. Fine for some limited applications, but Rapberry Pi and other 5 volt dependent boards will be left out in the cold. Besides, that price without a 5 volt boost supply??? I know Sparkfun is a little pricey, but they need to get a clue.
@@chrisw1462 After my suggestion, I bought and tested the product myself. the product cannot cut the power at its outlet. Apart from the 5v problem, this seems to be a more serious problem.
How is it going? RPi team post regularly but nothing seems happening with the EPS32.
lol love the part where you use your wife as an alarm clock... very funny :)
amazing. Somebody give this guy an award!
Thank you! Help would be more appreciated ;-)
@@AndreasSpiess Hi @Andreas Spiess, have you guys found out the perfect Power Board for all our needs? I see that you have created a Discord Channel. How can I join the Channel? Thank you
Not only you did a great amount of reasearch and documented it. You also made a video and shared your findings with the rest of the world.
Thank you very much!
You are welcome!
I love how Andreas, with his huge experience with enterprise IT vendors, subtly teaches a younger generation on how to manage collecting requirements and research available options.
Glad you share my opinion!
SuperPower! What a great idea for a project! I have struggled with UPS requirements for both Raspberry Pi and ESPxx projects. As you point out, nothing on the market quite does the job. I hope this project takes off like a rocket!
We already started, as you know...
Amazing project, thank you for taking the initiative Andreas!
My pleasure!
Having searched similarly - I gave up because every battery module had a deal-breaker as you describe. Joined the github and look forward to seeing what you/we can make!
Welcome!
Sometimes, great spirits meet them together and when I watch your videos I'm feeling in the right place !
Thanks a lot for sharing.
Glad to read that. Thanks!
I have to say, as I’ve endeavored down this IoT & home automation path there is one channel I keep coming back to for accurate and informative help: yours. I’ll search YT for something and when I see your pic you are now the first one I’ll watch.
Keep up the most excellent work.
Thank you for your nice words. The mean a lot to me!
I am loving this already, and we're just at the requirements. Nailed it! Maybe add a power monitor chip.
Head over to discord and convince the others with your use case...
Link to discord?
In the description
I just started consulting power management systems on a project, the timing for this is amazing! :)
Maybe you can contribute your knowledge to the project?
I am a mechanical engineer and will enjoy vicariously learning the design process for electronic devices. Thank you for making this an open project and I'm happy that I am in at the beginning to watch all of the phases.
So I hope you can contribute an learn in the project.
Thanks again Andreas! I have referred back to this video a number of times and get value from it every time.
Glad the video is still helpful!
I am really happy with this amazing step and I hope the designs will stay open source from the community and to the community. Also a collaboration with other youtubers may help in these type of projects(in a form of competitions with teams) .And I hope to see a lot of projects like this in the future.
The "superpower" project will stay open source.
WOW, this is a must video to watch for DIY projects. Thanks a lot!
You're welcome!
Thank you, a great project. I have never found the perfect power supply either. I am very excited about the team results.
You are welcome! Maybe you join Discord to participate?
Great Idea. Looking forward to see where this is going. Thanks!
You are welcome!
Creating a project for this is a good idea. Nice work defining the requirements and setting up the discord project. I look forward to checking it out.
Just join the discord channel if you want to see the action...
Awesome video and what a fantastic idea/project. Just what I and so many others need. Excellent, you deserve a medal for this !
I hope we will get enough working project members...
@@AndreasSpiess I think there will be many. At least to start... to persist is a little bit different. I'm a little bit in the hesitation fase...
Yesssss 😎 I would need and buy such a board. Greetings from Stockholm Sweden 🇸🇪 Thank you so much
Nothing to buy for the moment. Maybe some manufacturers watch the channel ;-)
Excellent initiative, Swiss power for Super Power boards!
I hope for a global push ;-)
I'm looking forward to seeing the completed product!
There will probably not be a product. Just drawings to order for everybody.
Excelent: Thank you very much for starting this project. I have joined the Github. I do hope this will be the first of many maker projects you will instigate and inspire!
You also have to join discord. There is where the music plays...
@@AndreasSpiess Discord Joined
Really happy about this, been needing and meaning to do the same thing for a while now
It will most probably not be only "one" thing. Maybe you check if your needs are covered.
Thanks for this - very informative and I'm excited about the SUperBoard.. I've been looking for a "good" power board as you describe for a couple of years. Can't wait to get a SuperPower board. It's crazy that a "good" board doesn't already exist
Maybe you check if your requirements are in the lists?
I will try to be there pushing some part of the project. Very, very nice initiative Andreas.
Very good. I still look for a teamlead for the ESP part...
What a superb idea! I will look forward to seeing how this turns out.
Unfortunately, the projects were interrupted due to supply chain shortages.
@@AndreasSpiess - Not to worry, it’s still a pretty cool piece of work.
Fantastic. I’m pretty sure I will need that soon., for ESP32. Thanks Andreas.
This is how engineering is done in the 21th century.
We will see how far we come this time. I decided to steer the project differently than last time when I tried to do it self-organized....
BTW: Your comment is now no more in the spam section. Very good!
@@AndreasSpiess Haha thanks - finally I have upgraded to being a resonable and trustworthy netizen :)
Brilliant Idea - to "crowd design" something that's useful to us all. Well done for the initiative. Unfortunately, I don't have the skills to contribute, but I look forward to acquiring the finished product for my modest projects.
We will see where it leads... Maybe a supplier picks up the ideas...
Great project idea. I stated something similar before the pandemic. I designed a simple board to test different LDOs and boost ICs. This is my first boost circuit, so I wanted to try different inductors.
This is the perfect incentive to pick up my project.
And maybe you share your gained experience in the project?
@@AndreasSpiess I joined your discord and posted on the LDO and boost channels
Great idea! Can’t wait to get my boards Super-Powered.
:-))
Hi Guy with the Swiss Accent! Thank you for your outstanding videos; I really, really enjoy watching them and I appreciate your presentation style and sense of humor. Best regards!
Thank you for your kind words!
@@AndreasSpiess Sincere thanks for your high quality, very interesting and informative videos! :)
Excellent video. As always technical great and presented very interesting. On the surface battery power looks simple. In realy life quite complex and lot os issues you need to take into consideration! So great to see this video.
We will see if it is complex or if people just do not have the right use case in mind when they design boards.
This is great Andreas! We have already tested some of these boards and they can only be used for proof of concept but not real application. We have designed a shield for arduino 1300 (lora) that uses tp4056 and LDO 3.3 v, including solar panel. (it needs redesign to include reset when voltage drops very low). We will be glad to help!
Great! I hope you already joined the discord community!
Thank you for starting this project about a month ago I went through a similar journey to keep a raspberry pi going during power failure and found a similar issues as you no board does exactly what we need it’s all compromises. If this works out we may have a great power board
Unfortunately, this project died long time ago because of supply chain issues :-(
Just started watching.
I have a interest in esp devices and raspberry pi.
Thanks again for all your work.
Maybe you join the project?
Love it! You are correct, there are many products out there that do not hit the mark, eg over voltage, under voltage, under temperature charge (for LiFePo4), voltage monitoring. Another use case is a solar powered ESP-32 that is physically small and designed for extremely low power idle, no USB interface.. with the ESP32 on board.
We have now two main paths: For ESPs (or other 3.3V MCUs) and for Raspberries
Wonderful Idea boss. I am no expert but eagerly waiting for project’s result.
Very good!
Ngl, your such amazing teacher of Iot, you alway make it easy to understand . ty
You are welcome!
Awesome idea! The INA219 is a very good and popular option for monitoring voltage and also sensing the load.
A good chip. But I do not see the use case right now. But maybe you add the requirement met by the chip in the project lists?
Very nice project, thanks Andreas.
Glad you like it!
Absolutely brilliant Andreas!
Glad you like it!
this is another brilliant and informative video
feature : bluetooth control and monitoring
Thank you. I think, requirements are better posted in discord.
amazing video good luck with that project!!!
Thank you!
This Is Awesome! Thank you for doing this! See you in Discord!
:-)
Brilliant idea! I hope this goes well.
Me too :-)
Great idea! I am looking for such a board as well.
Maybe you join the project?
Very good project idea. Could be a good alternative to commercial boards where there's always just one thing missing to be perfect !
In addition I hope we will get a modular design where you can delete what you do not need before you order the PCB
I would love a board for each of these applications! Joining the Discord now.
I assume you saw we are working in two teams
This is very fascinating and I hope, once I can get my head around this can participate and add some useful information. In the meantime, I am still having to sit by the sidelines and do some serious learning to catch up to you all.
The reason I am here is to learn how I can incorporate this technology into my model rockets
Maybe you join Discord to follow the discussions...
@@AndreasSpiess, okay, done. But am unsure how to participate. I'll figure it out eventually.
Love it! Although I won't be of any help in this project. Except maybe as a testing mule and guinea pig, when I can't break it, nobody can :D
Very important function: Creative tester!
this is a superb idea!
there is definitely a niche for this project on the market. I would happily collaborate, if I just had half your skills, Andreas. Unfortunately, I'm just a humble electrician with hobbyist level skills in electronics.
easy to foresee great success here.
best of luck!
This is also a way of learning, I think because the topic is not too complex.
Component trade study vibes! Love it
Thank you!
Great video!
Would be very useful to be able to control the “final” battery voltage, keeping it below 4.2 volts can hugely extends battery life.
Good idea. Maybe you add your requirement to the project lists?
I totally agree. Charging only to 4.05 or 4.1 V reduces capacity by 10-15% but extends battery life by 10 times! After half a year there is break even, where 100% of the 4.2V degraded battery is equal or lower then 80% of the 4.05V charge cutoff battery. I own a 9 year old lenovo thinkpad with 2h battery life - just by stopping charging at 80%
Very good idea!
Would be great if i could gain acces to the Google drive. I need some safe 18650 UPS to work as backup power.
Andreas you're the man! And you people are the best team!
Thank you! And yes, I like my viewers and how we collaborate.
Great idea. Been near this problem and I think first exception is that LCSC don’t have the battery holders!
Good to know. But luckily the easiest to solder
This project is very interesting, thank you! When one speaks of battery powered devices, there is one question which should be answered :do we want the device to run the longest possible time when on battery, or do we want the battery to have the longest possible life ? As far as I understand, 4.2 V is a maximum to charge a Li-Ion battery. Li-Ion batteries hate high charges, they degrade much faster when maintained at high charges than not. A perfect ups/power supply should allow to maintain the charge of the battery at a lower voltage, say 4.0V for example in case we want a longer battery life. This raises a new difficulty, as most battery protection chips will cut the charge at 4.2V.
Maybe you add your requirement to the list: ( docs.google.com/spreadsheets/d/1oGSQRG4XssmFL4II1EF2akhWRhvSvHqH1uTaYX9znlw/edit?usp=sharing )
Very early in the video I thought “Andreas needs to kick of a board design”. This is awesome, bit thumbs up on kicking this “SuperPower” project off.
Glad you like it!
Great idea, I'm sure it will be a success!
Let's hope!
Currently designing a gizmo that needs charging and 3v3 out; I've sort of settled on the TPS63031 buck/boost (LCSC part C15516) and BQ24073 charger/PMIC (C15220) but I'm always happy to find better ideas. No real monitoring capabilities though.
I added your chips to the lists. Maybe you check and correct (TI page is currently down) drive.google.com/drive/folders/1EVSzTGi6zV_2XqgAnM31S37PE2n4OdgO?usp=sharing
I had similar problems when searching for ideal solution to power my ESP32 with battery/solar combo. In the end I finally found nice step-up/down module Pololu S7V8F3 that is working great (plus INA219 to measure battery voltage and charge/discharge current). Unfortunately this module is expensive (at least in my region).
Thank you for the link. I added the tps63060 to the 3.3 volt regulators
@@AndreasSpiess BTW some of voltage converters (up or up/down) I tested behave strange when battery was LOW (below certain point but higher then discharge protection), for example when sun start to charge batteries converters stayed in "off" (or similar) state and only disconnecting them completely and connecting them again fixed that (but I did not dig into it so maybe it was my fault ?). But important to test this behavior when creating ultimate "UPS" :)
Nice project, best of luck.
Thanks!
Thanx, great video as always!
Glad you enjoyed it!
Wonderful video as always!
Thank you!
good one, learn a lot from your video. thank you
Glad to hear that! Thanks.
Excellent video with requirements clearly specified. Failings of existing 'products' usefully detailed. Maybe 'SuperPower' project could have outputs variable by +2 or +4% ?
Just add your requirements to the project lists and argue for it...
I love where this is going. I have a few of the single and double 18650 battery boards and think they need to be better designed like you say.
We will see what we can get out of the project...
@@AndreasSpiess looking forward to it very much. Will you do a follow up video?
Not decided yet
I will be happy to be in this initiative Andreas.
Just join Discord. They are already working...
Useful to have an interrupt, or digital line, for battery low, that is active for some time before dropout, or a small supercap to allow graceful shutdown when the battery drops out at low voltage. I had 6+ years of experience in power management for a large manufacturer of "mobile devices", and 3 years of doing application notes on dc/dc converters for "a German Oscilloscope manufacturer"....
So your know-how is very valuable. Maybe you join the project?
Thank u I needed this
You are welcome!
Great video! Thanks very much!
You are welcome!
Great project
Thanks for sharing :-)
Thank you too for watching!
Very interested in this project. I’d be happy to buy some kits when they become available. It should be of some use to the amateur radio community as well.
The plan is for the moment that everybody should be able to create and order their own boards. Maybe a manufacturer jumps on the wagon...
SuperPower is a great idea. I have not yet found a universal solution especially for projects that are supposed to run for a very long time but only need to be on a short percentage of that time, e.g. a e-ink display for data that comes in regular intervals or sensors for weather data or mailbox etc. A functionality for a timed power on and power off via gpio pin like with a TPL5111 or TPL5110 would also be nice for the SuperPower project.
I added the chips to the list
Nice idea. If you want to be able to carge a 4.2 and 3.6 battery tipe changing just one jumper (or switch), you can take a look at the TP5000 IC, it's a buck charging, up to 9v input (perfect for solar) up to 2A charging. Also, a nice feature would be an intelligent dual function: if the output is 400mA and the battery can charge, at it's current voltage, at 100mA, the carge controller should be able to compare it and still let 500mA go to the battery, since 400 will go directly to the output. If not, each time you have the output on, the cell will be depleted until charging and output current is even, and you will never have the full battery capacity (plus, it will be running charge-discharge cycles depending on the weather, if it's connected to solar power, and the battery will age faster...).
Thank you for the tip! I added the chip to the lists in the project
This is super!
Im not rly a developer, so im waiting as a consumer for esp32
:-)
Great initiative!
Thank you!
Excellent... was just wondering if at all my power supply boards will be useful ever..after discovering that they take more power than my esp and rpi ;).
I will join to brainstorm and help wherever i can.
Thank you for your help!
completely understand the problems facing with small battery systems. I had to build my own solar battery system for camping. Biggest problem is Li-Ion 3.7V cells. poor cycle life . systems ready for sale all use them. My needs are 12V 5V and USB C PD 65 watt . I went with LiFePO4 4 cell . my own BMS . Found MPPT solar on eBay for LFP 12.8V . put it all in noco battery box from walmart ! working great over 2 years now. LFP batteries have 2000 cycle life at 80% DOD. Is 200 watt solar/100 Ah batt. using car assery 12/24 to USB C PD 65 watt . with meter from eBay it's great ! so simple after bult my girlfriend is happy ! not a success until the outher half is happy ! great job !!
You are right, LiFePo are a good choice. Especially for higher power applications
This seems like such a great project, I just wish I had the time to help out!
You do! You stay up late, geek!
I hope we will get enough "power". Then you can watch things happening...
Awesome as always..
Thank you!
Hi Andreas, I love your videos! I was wondering whether the four cell variant, from this video, can be used as a UPS for a Raspberry Pi? In your Excel Sheet you remarked that it has a "short interruption if charge is disconnected", so I am wondering whether this short interruption is short enough for the batteries to kick in and start powering the RPi before it has a chance to shut down, as this is a key feature of UPS devices and regular power banks do not support that fast switching. This board is also pretty cheap and can hold 4 batteries which means that it should keep the RPi powed for some time if the power outage is bad. Could you test this and report back the results as I am wondering whether or not to buy it for my RPi. Thanks and all the best :)
I will not use this board for the Pi because it does not have the features needed (shutdown, etc.). This is why I started the Superpower project.
I'm an engineer for industrial automation, electronics and satelite technics. So i'm in. Really a cool idea at all !
Glad you like it!
Think you should specify parts for JLCPCB SMT assembly libary, as it is a subset of LCSC parts library. To make it feasible for smaller orders a focus on the basic selection should be encouraged.
You are right. I already added a link to this "library"
Since your LiFePo4 video I got a few bats and recently I decided to make a pcb! So I'm in!
Welcome to the project. There is already a lot of stuff there.
As always interesting and i hope this will result in some Interesting powerboards. I hope multiple, as i do not believe there will be one board for all use cases. This as some use cases can have conflicting requirements. (E.g. for some use cases weight and size can be verry important.)
I tend for a modular design with a maximum of function blocks and clear interfaces where you can delete the sections you do not need and create your own PCB.
Another 'Cruise Missile' of a project homing in on a much needed and beautifully researched and defined application. Glad that it's not just me that discovers the backwaters of Chinese only data sheets. It will be very interesting to see how high this flies. (Give Andreas his due - he even manages to slip in another reference to a non-existent individual).
I thought you get the prove of her existence this summer. Unfortunately we had to stay in Switzerland 🇨🇭
@@AndreasSpiess Let's hope that it won't be too long. Very best wishes :)
Wow, been looking at this kind of thing for a couple days.
Unfortunately the project was not finished…
@@AndreasSpiess Do you mean is not or was not? Was not is past tense and suggest that it won't be finished. Still sounds like a great idea. I'm trying to build a rover using ROS2, Realsense, OpenVino, RPi, and Aurdupilot. What you described was something I've been looking for to power the RPi (or other sbc). I know there are a couple solutions available, but I haven't found what I'm looking for yet.
@@SamFugarino The team does no more work on the project because they were hit by the supply chain crisis and did not get the parts they needed. Your project sounds very interesting. A lot of work, I assume ;-)
Thank you Andreas for the work on SuperPower project. May a university will attempt to participate in it. I don't see any volunteers.
Because of the global chip shortage this project is on hold.
@@AndreasSpiess it's an excellent project and I thought there would be more progress, but unfortunately the other superpowers are against it. :)
Nice project idea.
Thanks!
This is cool idea for open source 5V UPS.
Not only...
Excellent video and project, Mr Spiess. I'm currently working on a solar powered security camera, using a RPi 3A, a 60Ah LiFePO4 battery bank (4p2s flat packs reconfigured to ~8VDC from a power bank). 2 x 20W PV panels supply ~12-18 VDC to a buck converter to charge the bank @8 VDC. That is also a power bus to 5 VDC buck converters for the RPi 3A and ESP32 controlled tracking motors. In other words, my project requires all of your checkpoints. I'll be all over your site to follow up. Thank you for filling the need.🙏
BTW, I'd like one of those 'wife alarms'. Do they come with programmable volume or standby? Are they available on eBay?😎
They are not at all programmable. And even less can be muted. Maybe because of those features I love her ;-)
I've been thinking about something similar for a while. But one additional feature I've been curious about is load sharing between a usb dc in and a solar panel at the same time. I can't seem to find a good IC to handle the power management between two low voltage, low current input sources. Hopefully SuperPower will become the solution.
We will see...
I think their reason for putting voltage and current sensor on 5V line instead of battery voltage was not to monitor battery level, but more like to report how much current and power connected device draws, for optimising power usage. And while they could use only current sensing for that they probably wanted it to be more precise.
Some time ago I made something like that, I used tp4057, mt3608 and fs312f-g and 8205 for protection. Put everything on small pcb, set it at about 9v and put inside small cheap dso150. Works great. As i made a lot of pcb's due to small size of board (I got like 80 of them at jlcpcb at 5$ probably) I use them sometimes to power up other not very power hungry devices. And as it's common with all my designs, I managed to make a mistake when designing and mislabeled output pins.😅
I added you chips to the respective lists in the project. Maybe you check and enhance? ( drive.google.com/drive/folders/1EVSzTGi6zV_2XqgAnM31S37PE2n4OdgO?usp=sharing )?
Excellent video..!!
could I recommend a solder jumper to power optional LDOs
The project work is done on the discord channels now.
I need this right now
Why not join the project team?
SuperPower project is a nice idea!.. just whats needed.. i purchaced a TTGO T18 (esp32 wrover with 8mb psram), it has a 18650 battery holder on the bottom, but it brown outs when running off the battery... whats the point!..
thanks for another concise comparison and "fix" Andreas!
wife as alarm! i LOLed!
I hope we will get to a design where we can add the best ESP module for our purpose.
Hi, I bought 2pcs "52Pi Original 18650 UPS With RTC & Coulometer Pro Power Supply Device Extended Two USB Port for Raspberry Pi 4 B / 3B+/ 3B" as you have linked to in the description of the post. I have tried to use it now for the last couple of days. and some 18650 batteries who do not meet the standards regarding mah (it has a capacity of about 750mah) so I followed a link you have posted with another video, so I have to wait til it have arrived and see if it manage to keep the Pi running continuously on the UPS. but as of now this UPS do not manage to keep the Raspberry Pi running continually. I do not have any peripherals connected but keyboard and mouse. and I thought that a good power supply should have the unit running on mains(through the power-supply/transformer, not on the battery and when power outage it should switch to battery power and back to "mains" when the mains come back. so as to maximise the life of the battery?
I would check the battery voltage when the Pi runs on battery. Maybe the batteries also have a high internal resistance and do not deliver the needed voltage at higher currents.
I agree that a UPS have to have the function you describe. I do no more remember the details of the video, but I remember that I was not happy with all the boards and started the "SuperPower" project.
You have here a Great Idea, I help in whatever I can
Just head over to the dfiscord channel. There is plenty of action...
@@AndreasSpiess Already there :)
I search for somebody who reads Chinese to review the datasheets in the parts list of LCSC for useable chips. The list is in the announcement channel
@@AndreasSpiess I do have a Chinese name, I live in Hong Kong, but I do not read Chinese. If I can find someone who knows the technical vocabulary, I will let you know
Requirement - quiet/ no ripple/switching noise! This has caused me such issues before I realised!
The requirements are already collected here: drive.google.com/drive/folders/1f19RF6AQi-4VBvSjyZpHFr3eIGdKw_Vn?usp=sharing . So you can check.