Hackberry portal Forum HACKberry Q&A PCB for 2 sensors

This topic contains 32 replies, has 7 voices, and was last updated by  Leticia Luiza 3 months, 1 week ago.

Viewing 33 posts - 1 through 33 (of 33 total)
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  • #1090

    Nico Huchet
    Participant

    Hello team!

    We want to add a 2nd sensor in order to be able to control open and close of the hand. Do you know if anyone has tried it before? If not, can we modify the PCB?

    By the way, the english tutorial of the Exiii hand we made in Berlin is on My Human Kit :http://myhumankit.org/en/tutoriels/myoelectric-exiii-hand/

    Let me know if there is any thing you want me to chage/improve.

    Best,

    Nicolas

    #1091

    Hiroshi Yamaura
    Keymaster

    Hi Nico,
    First of all, thank you so much for your great tutorial! I’m very impressed.
    Actually, I already noticed your tutorial and made the link for your page in our wiki .
    (At the bottom of this page. http://exiii-hackberry.com/dw/doku.php?id=how_to_assemble).
    Our team appreciate your work.

    As for 2nd sensor, I agree that modification will surely improve the usability of the hand but nobody has tried it yet.
    Of course you can modify the PCB.
    You can find the pcb data from the following link.
    https://github.com/exiii/HACKberry/tree/master/HACKberry-hardware/electronics/HandBoard_v1
    We use kicad for editing the data.

    I just check the dimensions of the PCB.

    View post on imgur.com

    View post on imgur.com

    It is not impossible but placing two audio jacks between Arduino Micro’s legs seems a little difficult because of its space.
    Maybe we can’t get enough space for audio jack’s solder pads.

    I think connecting lead wires directly to Analog Input of Arduino Micro is feasible solution.
    We can also use smaller micro controller such as Arduino Pro Mini.

    #1093

    Nico Huchet
    Participant

    Thanks for your fast answer and your advices.
    As done on the first openbionics hand that uses 2 sensors (see picture), we are thinking to do the same if we find a way to auto power the muscle sensors.
    If not we will find a way to plug 2 muscle sensors, but we would probably place the jack connector out of the hand.

    #1094

    Hiroshi Yamaura
    Keymaster

    I just check specification of openbionics hand.
    http://static1.squarespace.com/static/56376cfde4b078ea32822fff/t/5694fe56a976af291c702472/1452605017485/Almond+Board+V1.2.pdf

    Although I bought an Ada Hand Kit, I didn’t notice they use 4-pole 3.5mm headphone jack.
    If we combine 4-pole jack and a splitter(such as https://www.amazon.com/Seadream-Headsets-Separate-Headphone-Microphone/dp/B01BJNM0BI/),
    we’ll be able to try 2 sensor easily. That’s good information. Thanks!

    #1097

    Nico Huchet
    Participant

    Actually if you use a Myoware with a power shield, we can get rid of the + coming from the arduino. In that case, I think we can use a 3 pole 3.5mm headphone jack. 2 for the signals, 1 for the common ground.
    Do you agree?
    Anyway we have to modify the PCB, I will order a pack probably soon.

    #1098

    Hiroshi Yamaura
    Keymaster

    Interesting! Your proposal is much easier than making new PCB for 4 pole jack.
    It would be good for quick test for 2 sensor.

    I just modified the pcb data.

    View post on imgur.com

    View post on imgur.com

    Reconnect one of 3 pole headphone jack pins to A6 instead of Vcc.
    (In this case, we also should modify the sketch of arduino)

    You can check the data from the following link.
    https://drive.google.com/folderview?id=0B_O4N8Ng5KyZYXZwSWhfeXY1Mkk&usp=sharing

    If you want to use pcb service(such as seeed studio), you can use this file set.
    https://drive.google.com/file/d/0B_O4N8Ng5KyZemlNakZVLWFmSm8/view?usp=sharing
    (I can’t guarantee the quolity of this data..)

    #1100

    Nico Huchet
    Participant

    I am glad to know you like the idea.
    Thanks for your rapidity, you are saving my time as I do not know how to use kicad (not yet:-).
    It seems like I can’t download the files from the drive and I actually don’t really understand which files I am supposed to download, they are too many

    Which file am i supposed to import into kicad?

    If you already have made the modification on the PCB to A6 for the second sensor, I would probably order 2 full packs : PCB modified + electronic components + all the 3D printed parts (if I have no time to print them)

    How long would it take to ship it to France?

    Thank you.

    #1101

    Hiroshi Yamaura
    Keymaster

    Sorry, we didn’t test this pcb and will not sell it for now.

    Have you (or your colleagues) ever use PCB manufacturing service such as Seeed Studio?
    The file you need for order is only 160902HandBoard2Sensor_v1.zip.
    Other files will be used for editing in kicad.

    You can access Seeed Studio from the following link.
    https://www.seeedstudio.com/fusion_pcb.html
    If you upload the data(160902HandBoard2Sensor_v1.zip), you will be able to order this modified pcb.

    #1127

    Nico Huchet
    Participant

    Thanks Hiroshi,
    We have ordered 5 PCB modified and we will be able to test soon.

    We are going to order 2 full kits Exiii HACKberry with all the 3D printed parts for the hand. Cann you tell me how long this would take to be ship to France?

    Best,

    Nicolas

    #1128

    Michael Repajic
    Participant

    Hello Nico and Hiroshi,

    I checked out the link to your tutorial and noticed that you bought materials from Genta Kondo: genta.kondo(at)exiii.jp ;
    Are the materials still available through that contact, or do they need to be bought separately? Thank you for your time.

    Regards,

    Michael

    #1129

    Hiroshi Yamaura
    Keymaster

    Hi Michael, Nico,

    Sorry, the kit is no longer available from exiii.
    https://www.facebook.com/exiii.jp/posts/1188542201168176

    If you need, please get each components separately from the store listed on the BOM.
    https://github.com/exiii/HACKberry/blob/master/HACKberry-hardware/HACKberry_BOM_v1.xlsx

    As for PCB and 3D printing parts, please get them by using following document.
    https://docs.google.com/document/d/1lNPcouGmjLMe7-bAQ6hxlp5movhy_fizSsHiVVOBsjk/edit?usp=sharing

    #1131

    Nico Huchet
    Participant

    Thanks for the info. It’s a pity, but I understand you so much, it is not easy to do R and D, community management and product sellings.

    Anyway, you are doing very well, and you are very responsive, very professional.

    I will find the equivalents in Europe.

    By the way, I received the modified PCBs!!

    Best

    #1135

    Hiroshi Yamaura
    Keymaster

    Thank you for your understanding and kind words, Nico.
    We wish we could continue the selling but as you said, it was not so easy and time consuming.

    As for the PCBs, I am little surprised to hear that you’ve got them so fast.
    Please give us your feedback about it. Thanks!

    #1136

    Michael Repajic
    Participant

    Hello Hiroshi,

    I am trying to locate the .STL file for the PCB boards. I am unable to locate the .STL file.
    Is there another file I should be looking for? I just want to know how I can obtain the
    necessary PCB boards. I followed the link you provided earlier but I am a bit confused
    about the process. Thank you

    Michael

    #1137

    Michael Repajic
    Participant

    I believe understand the process now. Downloading the .ZIP file and uploading it to Seeed in order to
    produce the PCB. Please correct me if I am wrong in my understanding. I appreciate your time

    #1138

    Hiroshi Yamaura
    Keymaster

    You are right. Check this instruction for more detail regarding order.

    https://docs.google.com/document/d/1lNPcouGmjLMe7-bAQ6hxlp5movhy_fizSsHiVVOBsjk/edit?usp=sharing
    If you have any troubles, please let us know.

    #1168

    Nico Huchet
    Participant

    Hiroshi,
    We are having issues to find all the elements in Europe. Big problem, we need to be ready for a big hackathon with Airbus in 2 weeks. Do you have any tips? I followed the links on the Excel file, but it is only for Us.
    Need help!
    Thanks.
    Nico

    #1169

    Hiroshi Yamaura
    Keymaster

    OK, I just created Google spread sheet to solve this problem.
    https://docs.google.com/spreadsheets/d/116ThoPHAKhcy_gyfd6WqXMeeBQ91X1kE8dL2MeQv8go/edit?usp=sharing
    Let’s complete this sheet.
    Could you let me know which parts are difficult to get in EU?
    Please arrange this sheet directly.

    One more question, should the components be shipped to France?

    #1176

    Nico Huchet
    Participant

    Hello Hiroshi,
    It seems like I found all the components in France, it is slightly different sometimes, for exemple, the shaft d2 l15, is d2 l16. Thanks very much for your reactivity anyway.

    I have another question:

    Can you tell me why you use Adjustable DC&DC Power Converter (1.25V – 35V&3A as the voltage converter? Is it because the maximum load can go up to 3A? Do you have any ideas about the maximum load of the hand?
    – We would like to use a 7805 voltage regulator instead, do you think is is possible? The difference is that this regulator as a maximum load of 1A

    Many thanks

    #1177

    Hiroshi Yamaura
    Keymaster

    Hi Nico,
    I’m relieved to hear that you could get all components.

    As for DC-DC converter, yes, I selected the module because it can supply maximum 3A.
    In our study, the maximum stall current of large servo(3001HB) is about 750mA
    and that of small servo(ES08MD) is about 800-1000mA.
    We’ve not tested but the total current will be more than 1A when all servo will stall.

    #1191

    Nico Huchet
    Participant

    Thanks Hiroshi.
    We finally made it: Control the Exiii hand plugged on my ottobock socket and ottobock electrodes. I can control and stop, open and closing I can also rotate the thumb with a double contraction.

    https://github.com/MHKit/mhk-exii

    i will be able to sent you a video soon

    #1193

    Hiroshi Yamaura
    Keymaster

    Congrats Nico!
    The functions sound very nice.
    I think it really expand the possibilities for HACKberry.
    We’re looking forward to see your video. Thanks!

    #1254

    Nico Huchet
    Participant

    Hello Hiroshi!
    I hope it is going well on your side.

    Did you have a look to our Github with the Exiii working with 2 muscles sensors?
    We get rid off the buttons control, open and close the hand with each sensors and to rotate the thumb, a double contraction
    https://github.com/MHKit/mhk-exii

    I was wondering if you could sent me the equivalent of the PCB 2 sensors for the Left Hand as you did last time?:

    (“You can access Seeed Studio from the following link.
    https://www.seeedstudio.com/fusion_pcb.html
    If you upload the data(160902HandBoard2Sensor_v1.zip), you will be able to order this modified pcb”)

    Many thanks.

    Nico

    #1259

    Hiroshi Yamaura
    Keymaster

    Hi Nico,
    Yeah, I saw your recent movie. It is fabulous!
    I was really surprised and pleased to see you use HACKberry very well.

    I also saw Google France’s movie. That’s great.

    As for PCB, please try it.
    https://drive.google.com/drive/folders/0B_O4N8Ng5KyZaC1HZjRneENfbWM?usp=sharing

    [Before]

    View post on imgur.com

    [After]

    View post on imgur.com

    I simply reconnect one of 3 pole headphone jack pins to A3 instead of Vcc.

    #1260

    M Freard
    Participant

    Hello Hiroshi. Thanks a lot for your speed job!!
    I’ m a teatcher and work with Nicolas and I needed a PCB for a left hand. Students are working on the Exii hand to improve it.
    I will inform you of the evolutions.
    You can add it in the github?
    We also provide educational kits for children to understand how it works. A link for a blog :
    http://petitelande-reze.loire-atlantique.e-lyco.fr/decouvrons-le-college/du-cote-du-fse/club-human-lab-my-human-kit-/eleves-de-terminales-qui-travaillent-sur-une-main-bionique-41719.htm

    Thanks a lot.
    Michel

    • This reply was modified 11 months ago by  M Freard.
    #1262

    Hiroshi Yamaura
    Keymaster

    Hi Michel.
    I saw the link. The educational kit looks nice.
    As for github, which repository do you want to add the data to?
    exiii’s one? or MHK’s?
    https://github.com/exiii/HACKberry
    https://github.com/MHKit/mhk-exii

    #1263

    M Freard
    Participant

    Hi Hiroshi
    I think you have to add the file in your exii’s github.
    For the kit, it will be further improved. We program with mBlock software. You know. It is a graphical interface of block programming. It then translates into code.
    http://www.mblock.cc/

    And in France I help to develop an open-source software blockly@arduino.
    https://github.com/technologiescollege/Blockly-at-rduino

    There is also Kittenblock based on scratch 3.0

    Here are ways to program the Arduino with children
    https://github.com/KittenBot/Kittenblock

    Thanks a lot
    Michel

    • This reply was modified 11 months ago by  M Freard.
    • This reply was modified 11 months ago by  M Freard.
    • This reply was modified 11 months ago by  M Freard.
    #1267

    Elvio Lievert
    Participant

    Good evening hiroshi you sent me the diagram of the right hand, could you please send me the left-hand diagram?Thank you one more time for always helping me

    #1270

    Hiroshi Yamaura
    Keymaster

    This topic is for 2 sensors PCB.
    Please use other topic to avoid the confusion.

    I just answered your question on this topic.

    左手用の基板について Question about PCB for left hand

    Thanks,

    #1275

    Nico Huchet
    Participant

    Hello Hiroshi,

    I don’t know how much is it to keep the community up to date, but yo really do a great job.
    Exiii is a very good hand although it is still too fragile (plastic), I think the thumb axis must be reinforced, it will break first.

    I am hoping to work with you one day. How can I exchange with you about that?

    Best

    • This reply was modified 10 months, 3 weeks ago by  Nico Huchet.
    #1279

    Hiroshi Yamaura
    Keymaster

    The name of the hand is HACKberry. exiii is our company name.

    As for HACKberry project, Mission ARM Japan(MAJ) took over this project from exiii.
    If you need the collaboration as organization, please get in touch with MAJ.
    info[at]mission-arm.jp

    For other things, contact me from Facebook or LinkedIn.

    BTW, could you upload the picture of broken thumb?
    Please clarify the week point.
    We may be able to find the way to reinforce.

    #1292

    EW CHEE GUAN
    Participant

    Hi All,

    I’m glad to see the 2 sensors version operating flawlessly.
    One of my recipient ( I’m E-Nable volunteer and I make hands and give away for free ) lost both left and right hands in an accident and he can’t flip the switch on Exiii Hackberry hand.
    I have checked his hand condition, and I build a special socket for him, with build-in IR sensor.
    He can’t use 2 sensors.
    I have an idea about few months ago, I wish to keep the original hardware design, but modified the code for the purpose.

    1) the user trigger the IR sensor quickly 2 times, it toggle between ease mode and normal mode ( ease mode=user trigger the IR sensor 1 time but hold a little longer than mode change function , the hand close, and user trigger one time again ( hold a little longer than the mode change function ) , it open . the normal mode is the same as original movements)
    2) the user trigger the IR sensor quickly 3 times, it toggle the thumb position .
    3) the user trigger the IR sensor quickly 4 times , it toggle the finger mode

    By changing the code to above functions, all hardware can be remains the same without any change, but the mode push button can be omitted.

    I’m not really familiar with Arduino coding, after months of learning, still no progress.

    Can anyone who have coding knowledge help me on this please?

    ** since this is a little bit off topic, I create another new topic to avoid any confuse **

    • This reply was modified 9 months, 2 weeks ago by  EW CHEE GUAN.
    #1417

    Leticia Luiza
    Participant

    Nico Good morning, I did a prothesis of the exiii hand, but the changes you made I also found it fascinantee and I would like you to help me use the two sensors and move the thumb without the button

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