Construction of an 8x8x8 RGB LED Cube. Part 4: Testing 8x8 Panels

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This is part 4 of a series on how I'm building an 8x8x8 RGB LED Cube. This time I demonstrate the testing of the 8x8 panels
Useful files of project so far for Download (PDF format):
www.dropbox.co...
Includes:
Schematics
PCB Layouts
Gerber Files
Arduino Sketches
Full Parts List
Jig Drawings
Blogs
EE Times blogs:
Note added 26th Sept 2020:
I have only just noticed that my articles on EETimes are no longer available. I contacted the Editor in chief that posted the articles and asked what had happened to them and he said that EETimes had technical issues when migrating a number of articles to new systems, and that they have made no effort to re-instate them. This happened a while ago apparently and I wasn't made aware until now. Therefore the original links are broken and I have had to remove them.
Apologies for the inconvenience, but this is not of my making. However I have started to make the blogs available as downloadable PDF files from my DropBox account here:
www.dropbox.co...
Related RU-vid videos:
• Constructing an 8x8x8 ...
• Constructing an 8x8x8 ...
• Construction of an 8x8...
• Construction of an 8x8...
• Construction of an 8x8...
• Construction of an 8x8...
Also check out my Hallway Lighting Project links:
Neo-pixels in the Skirting Board video:
• Neo-Pixels in the Skir...
Hallway Lighting Project blogs on EE Times Parts 1, 2,& 3:
These Blogs were also decimated by EETime, and will be made available via PDF download in due course.

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1 окт 2024

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Комментарии : 120

@stevemanley3685 9 лет назад

Useful files of project so far for Download (PDF format): www.dropbox.com/sh/fyvszu2xnow17fg/AACotfHOmN3eo0gS3QTL1lH1a?dl=0

@alirifaat645 4 года назад

Hi, sorry for the inconvenience A question in this video, is the source through Jordanio or through the power supply?

@stevemanley3685 4 года назад

Hi, Good Question. The circuit is supplied with 5V from an external power supply. The Arduino is powered via USB from the Computer. The Arduino GND is connected to the circuit GND.

@basitdoank3030 4 года назад

hi steven, is your coding the same if i use ic 74hc595 not using tlc5916 like you, but my outs are already adjusted, sorry i'm a beginner to use arduino :( thanks

@stevemanley3685 4 года назад

Hi Basil, in short, without looking into each chip specifically, I don’t know. Not sure why you want to change the shift register chip. The TLC5916 is designed for driving LEDs and only uses 1 current limiting resister per chip. You will have to provide a current limiting resister per output if you use the 74HC595, plus they are not pin compatible devices, so won’t work with my PCB design. Regarding the software, you might have to invert the signals on some of the Arduino outputs, and if your changing the hardware design, then I will leave it to you to troubleshoot any issues that arise, and modify the software accordingly yourself.

@basitdoank3030 4 года назад

okay, thanks 🙏

@alirifaat645 4 года назад

Thank you I have worked Question in the last step 6: Is the current together for the circuit and the airduino or the The current is separate from airduino

@RahulDeoPhotography 4 года назад

I learned a lot by just watching your videos. As a first step, I built a smaller, 5X5 RGB cube (as it almost eliminated all additional hardware) and its working beautifully. I'm now ready to build a 11 X 11. Thank you for the inspiration.

@stevemanley3685 4 года назад

You are welcome, and thank you for your comment. An 11x11 cube, wow! That will be quite a bit of work. Good luck, and let me know how it goes.

@stevemanley3685 10 лет назад

@Sean, Yes I have to admit it's a while since I posted a video. I shot the footage of the cube assembly but not yet created the video. I'll see if I can get it done over the next few days.

@luisoviedo7056 6 лет назад

Hi Steve. Which other components could this replace? TLC5916IN SN74HC595N CD74HC4050E AUIRF9Z34N

@stevemanley3685 6 лет назад

Hi Luis, Sorry it has taken so long to get back to you. Not sure why you want to replace these components. They work fine as they are. You are welcome to try different components if you wish. If you do, then you might find some components are not pin compatible, which means changing the circuit diagrams, PCB layouts & Gerber files.

@MK-vi3cb 5 лет назад

Hi Steve, The main PCB board Gerber files does not have the white coding when I order them. Is this suppose to be added by manufacturer based on Gerber files?

@stevemanley3685 5 лет назад

Hi, the solder mask and silk screen colours are not contained in the Gerber files, so you specify them separately when you place the PCB order. Using colours other than the standard green for the silk screen, will add cost to the boards.

@chrismiller1852 9 лет назад

Steve, I'd like to use your Gerber files but don't know the dimensions of the boards you used for the Base, Anode Driver, and Shift Registers. Could you provide? Your videos are awesome and very helpful. Thanks in advance, Chris.

@stevemanley3685 9 лет назад

+Chris Miller Hi Chris, Glad yo like the videos. Just be warned the board and circuit designs are prototypes and are therefore imperfect. Needless to say they do work though. Board dimensions are as follows: Base: 228mm x 228mm (9" x 9") Shift Register: 100mm x 50mm (4" x 2") Anode Driver: 127mm x 76mm (5" x 3")

@davebate3108 8 лет назад

Cost and availability of PCBs seems to be a recurring theme, as it seems there is a keen interest in building this fantastic cube. I built this project, the hard way, using prototyping stripboards, and lots of ribbon cable, super-glue, etc., to fan the wiring out to the LEDs. Apart from 1 dodgy LED, it all worked perfectly. Thankfully the bad LED was at the outer edge of the cube, so was relatively easy to replace. If Steve will allow, and I'll go no further if he objects, I have designed a set of PCBs that I know I can have manufactured at a very reasonable cost, providing I can order a minimum of 10 sets. My design differs slightly from Steve's, I have opted for a Cathode shift register board for each panel, and one Anode s/r board. The additional buffering needed for the OE LE and CK networks is taken care of on each Cathode s/r board. The Cathode and Anode S/R boards simply use straight IDC plug/socket connectors to mount below the base PCB, to which the cube matrix is mounted on top. There are no SMT components anywhere, one thing I know was a subject of some concern. Apart from 6 connections from the Anode S/R board to the Arduino, there is no other wiring to do, everything is handled on the 4-layer base board. Even the Arduino is powered from the Anode S/R board!. This will make this a doddle to connect up. I've said it before, possibly here, and elsewhere, the true success of this cube is what you see up top, and that is dictated by the design of the jigs.... fantastic job Steve !! Anyway, back to the PCBs. A "set" consists of ... 1. Base Board - 9 inches square - 4-layer - FR4 - 1.6mm - I have deliberately put no silk-screen text on the top layer, in case you don't use the .... 2. Cover Board - 9 inches square - NO COPPER - 1.6 mm - both sides totally silk-screened black. This board is a cosmetic cover for the Base Board... the cube LED wires pass through it, so topside is all nice and tidy. You don't have to use it, depends how you want your cube to look. I can't exclude it from the "set" however. 3. Drivers Board - All 8 Cathode driver boards and one Anode driver board are panelised on this one PCB. They will need to be cut (separated), which I can do for a small fee. If at least ten people can give me their intention to purchase the set of 3 boards, I will be able to sell them for just £69 per set, (add £5 for cutting the Drivers Board). Price includes postage to you, but it needs a minimum of 10 people willing to give me their word they will buy... a dangerous game, I know. If you are interested, drop me an email at abtrain@tiscali.co.uk

@stevemanley3685 8 лет назад

Hi Dave, Thanks for your kind comments on my build method. You were brave to build the circuits on strip board. I had contemplated doing it that way initially but wanted mine to be as neat as possible, plus I wanted to try creating the circuit boards, which I enjoyed immensely. You are very welcome to create and sell your own versions of the boards and I'm happy for anyone attempting to build a cube to ask questions regarding the build method, but I will draw a line under supporting your circuit variant and circuit boards, that must fall to your good self. I have had a similar experience with someone else who created their own board and is still selling them, yet offers very little support to those having issues with those boards. I'm not in it for the money, but anyone who is, must take responsibility in supporting the people they you sell the boards too. Good luck and perhaps let me know how you get on.

@sebastiaanmaes 8 лет назад

hi steve, i have build your cube at home. there's just something that doesn't work. so i want to program that all the lights in the cube lights up. can you write/or tell the arduino code. i tried it at my own, but i dont now if my cube works correctly or i did something wrong with my own written code. thanks in advance!

@stevemanley3685 8 лет назад

Sebastiaan Maes Hi Sebastiaan, if you haven't already, check the description of this video for links to all the files. You will find my code plus a connection schedule. Try these to verify your wiring etc. and possibly connect just one shift register board temporarily to see if that works.

@philipmansfield1248 3 года назад

Hi, I am recently retired and dabbling in electronics and making test pieces at the moment. I do like the look of your cube though. The one weird thing though is that the measurement of the base board comes out at around 16" on the PDF's which is way too big and entering the Gerber on PCB way the size comes out at a ridiculous Steve_Manley_8x8x8_Cube_Base_Board_V1.1.zip (426 kb)100% Success Detected 2 layers board of 31.1 x 7.3mm(1.22 x 0.29 inches). So something is way off there. Obviously there needs to be some sizing corrected before ordering some prototype boards. Any ideas please, I am just starting my electronics journey. Also the arduino sketches just shows .ino files, are there any parts diagrams or have I got to take them off this video. Many thanks if you get to read this and reply. Not afraid of installing stuff, good with CAD can't remember the name at the moment but I used it a lot as a foreman groundworker getting measurements for site work.

@philipmansfield1248 3 года назад

@Steve manley Many thanks for such a prompt and brilliant reply. I will definitely try the V.2 files and try them with PCBWAY to see what happens. The price on JLCPCB does sound rather good. Unfortunately mother took a tumble a few days ago and things are not great at the moment, the hospital even let both of us visit at the same time. She has kidney failure at the moment and things are looking a bit bad, just keeping fingers crossed as there is not a lot else we can do. I really do like your design and I might have a go at redesigning the base to use through the board fixing holes for the 4 boards that are underneath. Your wooden base is simple but brilliant, I really like that as well. I might redesign that as well to use a nice brass screw on the corners so that it could be dismantled if needs be. Also your wooden base lends itself for covering with a perspex/ acrylic case. My idea would be to order enough for 5 units and then see if I could either assemble and sell them or sell them as kits to help defray costs. I will definitely let you know how I get on but things wont be fast at the moment.

@stevemanley3685 3 года назад

@@philipmansfield1248 Very sorry to hear about your mother, I do hope she improves. I’m also glad you have been able to see her. If I were to do the cube again, I’d place most of the shift registers on the underside of the main board as SMT devices, and use different chips with built in pulse width modulation. I’d also go black on the solder mask. Personally I’d try and avoid through hole components other than the LED structure, but as I copied and adapted my design from other folk, by all means adapt what I’ve done to your suit your needs and requirements. I wish you all the best and please do share what you do. It may benefit others.

@philipmansfield1248 3 года назад

@Steve manley Hi Steve i checked out the V2.0 files on PCBWAY and they come out the correct size. but they come out at $85 for 5 boards plus shipping. What program did you use for designing these boards? as I mentioned in my earlier reply I would like to make the pads through hole for fixing. Checked out JLCPCB and their prices are a hell of a lot cheaper and so is shipping.They do not show the white board though, but you can change that on the order form at no extra cost.

@stevemanley3685 3 года назад

@@philipmansfield1248 I did say in my original reply that I used EasyEDA for V2. I used Fritzing for the original design. I wanted to use Eagle but as I had a hobbyist licence, I was limited to small PCBs only. I have also used KiCad. I do have a full Fusion 360 licence but find the PCB design tool frustrating and buggy, so I’m drawn to using EasyEDA more often than not. What’s nice about it is that it links into JLCPCB for ordering boards and JLC seem to be the cheapest in my experience.

@philipmansfield1248 3 года назад

@@stevemanley3685 Hi Steve, many thanks again for your kind words about mother, not heard anything this morning so that is good news. I shall definitely persevere with this and thanks again for your kind assistance. I will keep you informed and let you look at what I produce for your comments before building anything. We must be very like minded as I was thinking black for the base board myself. Could you give me a clue to the shift register smt devices and chips that you would use then I can check them out on Farnells. I already have an account there.

@alirifaat645 4 года назад

Hi, what does gerber files in attachments

@stevemanley3685 4 года назад

Hi, Gerber files are the files needed by a PCB Fabrication House to manufacture the PCB’s. There are files for the top and bottom copper, silkscreen and solder mask layers, drill file, pick and place file and bill of materials (BOM). The pick & place and BOM files are only needed if the Fab house is assembling the components onto the board for you.

@bobdavis321 9 лет назад

I was just testing out the same thing last night!

@alirifaat645 3 года назад

Hiis a line in Shift Register Board 1 JP3 Pin 2 with Shift Register Board 2 JP1 PIN2

@stevemanley3685 3 года назад

Hi Ali, I am sorry to say that I do not fully understand your comment. If you are unsure of the all the circuit board interconnections, then please take a look at the wiring schedule: www.dropbox.com/s/jdflm8djeiod0of/Steve%20Manley%208x8x8%20RGB%20LED%20Cube%20Circuit%20Board%20Interconnections.pdf?dl=0 If this is of any help, the CLK, LE & OE signals are shared across all 25 of the shift registers simultaneously. The DOUT signal is connected to the first shift register only. That signal is then daisy chained through all the other shift registers and loops from Shift Register Board (SRB) 1 to SRB2, then from SRB2 to SRB3, then SRB3 to SRB4 via the JB3 Pin 1's to JB1 Pin 1's. Unfortunately with my choice of devices, the CLK, LE & OE signal outputs from the Arduino were not able to drive that many shift registers, so I had to include a buffer chip on the Anode Board to split those signals into 2 lots, thus the CLK1, LE1 & OE1 drive the 1st & 2nd shift register boards only (13 shift registers), and the CLK2, LE2 & OE2 drive the 3rd and 4th shift register boards only (12 shift registers). Each SRB gets power (+5V & GND) from the Anode board, plus I loop a GND wire from each SRB to the next to maintain a signal ground. I hope this helps?

@alirifaat645 3 года назад

@@stevemanley3685 I worked on the attachment pdf. Thank you for the nice information. I got it wrong when connecting board 1 jb3 pin2 to board 2 jb1 pin 2 off led knowing there is a little glow led

@stevemanley3685 3 года назад

@@alirifaat645 Thats great news, thanks for letting me know :-)

@alirifaat645 3 года назад

@@stevemanley3685 @Steve Manley yes the news is nice but i am having a problem with bore 1 jb3 pin 2 with connectivity in board 2 jb1 pin2 no led glow

@stevemanley3685 3 года назад

@@alirifaat645 Hi, it’s not easy for me to say what’s wrong as I don’t have your cube in front of me. I can suggest swapping the SR boards around to see if there is a fault with a board or the wiring. If it’s a board, then the fault will follow it around. If the fault stays the same then it’s probably wiring. Also, just try only the first SR board connected in position 1, if that works, then move that 1 board to the other LED positions. This will prove the LEDs are okay. If the LEDs are all good, then add the 2nd board, if that’s okay, add the 3rd then the 4th. This should help you identify where the fault lies.

@nelutrifoi 8 лет назад

sorry, AUIRF9Z34N is the same IRF9Z34N? (I Ask)

@stevemanley3685 8 лет назад

Yes I would think so

@seanpain4 10 лет назад

When is the next video coming? I'm keen for it

@Snakesjinjuriki 7 лет назад

Hey, Steve I'm nearly done assembling a cube which I built following your blogs and videos. I was just wondering, with your circuit, can you control the luminosity/brightness of each LED? Thanks

@edsammy7529 8 лет назад

Fantastic job on the cube Steve

@stevemanley3685 8 лет назад

Nice of you to say, thanks Ed.

@hieule5834 6 лет назад

Hi Steve, can I replace TLC5916 by HC74595?

@stevemanley3685 6 лет назад

Hiếu Lê Hi, They are not pin compatible, so if using my circuit and PCB designs, I would say not. If you want to adapt the circuit and make your own PCB design, then give it a try, but wire it up and test it on some prototyping board first

@hieule5834 6 лет назад

yep, thank Steve!

@3dfreakful 9 лет назад

nice job

@arek462 7 лет назад

Did you use P-Channel Enhancement Type MOSFET?

@stevemanley3685 7 лет назад

This is the MOSFET I used: uk.farnell.com/international-rectifier/auirf9z34n/mosfet-p-ch-55v-19a-to-220ab/dp/2062068?ost=2062068

@arek462 7 лет назад

Thanks :)

@SlegiarDryke 7 лет назад

Heya Steve. do you by any chance have a parts list available for the panel tester, since it seems to use additional parts than what is required for the final set of boards? and if we can't get a hold of the same kind of prototyping breadboard, does it seem plausible to cobble one together from several smaller breadboards, as long as the overall circuit is preserved?

@stevemanley3685 7 лет назад

Slegiar Dryke Heya Slegiar, I didn't create a parts list for the tester as the electronic components are the same as the finished cube, just less 21 shift registers and the buffer chip. The breadboard is one that I have had for more years than I can remember, but yes, just make up you own. After all, mine is made up of several boards, just in a convenient purpose built cradle. I think the only other items were the test clips, and I got those from Amazon dirt cheap and came from China, if memory serves. Hope this helps.

@SlegiarDryke 7 лет назад

ahhh, alrighty, that clears things up. and my main concern with the breadboard was the "ABCDEF -GHIJKL" split for this one, versus the ABCDE-FGHIJ that i tend to see more often. i did find your exact board, but it's a UK based site and doesn't appear to be able to ship internationally. so i'll see what i can find. unless i'm missing something from the video it looks like things can be compacted down to fit an ABCDE width restriction with a little fiddle work ^_^

@stevemanley3685 7 лет назад

Slegiar Dryke Great stuff, just bear in mind I spread things out for the video, so compacting is just fine.

@SlegiarDryke 7 лет назад

going off the listing on the parts list for the power supply of 6V at 3.3A, is that the power that gets used in all instances when driving the LED panels? as in here (while i assume the arduino uses its 5v to control the mosfets), and later in the full cube?

@stevemanley3685 7 лет назад

Slegiar Dryke Hi Slegiar, the power was calculated for the cube. Because the cube is multiplexed a layer at a time, the most Leds lit at any time (all white) would be 8x8x3 = 192, then multiply by 20mA per led (typical current per led) gives about 3.8 amps. The cube in reality will never draw that much current and I found a 6V 3.3A supply to be adequate. Recently I ran the cube quite happily on a 5V supply. When testing the cube while developing it (originally designed for 5V) it dint work and I found increasing the voltage gave better results. But as it happens that wasn't the issue and when I did fix the issue, I never tried dropping the voltage back to 5V. If you do use 5V, replace the diode on the Anode board with a link wire, but then nevertheless it on 6V, else the shift registers could be damaged.

@nelutrifoi 8 лет назад

AUIRF9Z34N is the same IRF9Z34N

@stevemanley3685 8 лет назад

+Jani Trifoi Are you asking or telling me that these to items are the same?

@gamalielsevillano5156 8 лет назад

hey puya me gusta,.. quisiera hacerlo para mi proyecto.. de expo.. algun contacto.. FACEBOOK para hablar mas de como se hace

@stevemanley3685 8 лет назад

gamita sevilla Hi, please can you post your comment in English.

@gamalielsevillano5156 8 лет назад

Hey I like, I would .. Do it to me .. Project .. exhibition .. some contact FACEBOOK para Talking over as done

@stevemanley3685 8 лет назад

gamita sevilla Hi, unfortunately your comment in English is not that clear. If I understand what your asking, I do not have a Facebook account and I do not usually give out my email address. Very happy to reply to comments here on RU-vid provided I can understand them. Sorry if this is not what you wanted to hear.

@gamalielsevillano5156 8 лет назад

I can help in programming the Arduino

@stevemanley3685 8 лет назад

gamita sevilla Hi, is that you want to help me? or you want me to help you? If you want to help me then go ahead and alter the code however you like, then share it with me. If the other way round, then what is it you need help with?

@austindale3129 8 лет назад

Please help me to find the arduino code for this test panel. the code in the link provided will not compile it is just full of errors. I am looking for a copy paste code. I don't know how to write code. Anyone?..

@stevemanley3685 8 лет назад

Austin Dale Hi Austin, right now my home broadband is down so I can't get to the files from my home PC, but the file is fine because it worked just fine for me plus others have used it without compile errors. I suggest you have not configured your Arduino IDE correctly or maybe you have a new version of the IDE that my code has not been tested against. To get going, follow the tutorials on the Arduino web site and try the simple LED Blink program to prove you set things up properly. Then re try my program. You can open it in Notepad (on a PC) copy past into a new sketch.

@austindale3129 8 лет назад

Great Thank you for the quick response. I got the "Panel_Burn_in_Test_v1_0.ino ·" to compile and upload no problems. I have everything hooked up to the panel exactly like you showed in the video but nothing is happening. I have 5v going to the advanced breadboard and the arduino is hooked up via usb to my mac. am I missing a step. how do I get the program to run? Thanks again

@stevemanley3685 8 лет назад

Austin Dale Hi, the program runs automatically as soon as the upload is complete. All I can suggest is check and check again all the wiring. 5V is good enough for just the panel test and running the Arduino from the Mac is also fine.

@stevemanley3685 8 лет назад

Austin Dale Maybe also post some photos and post a link so I can see what you've done. I figured out someone else's issue that way.

@austindale3129 8 лет назад

facebook.com/photo.php?fbid=10153411645908039&set=pcb.10153411650038039&type=3 facebook.com/photo.php?fbid=10153411645843039&set=pcb.10153411650038039&type=3 facebook.com/photo.php?fbid=10153411645893039&set=pcb.10153411650038039&type=3 facebook.com/photo.php?fbid=10153411646388039&set=pcb.10153411650038039&type=3 facebook.com/photo.php?fbid=10153411646673039&set=pcb.10153411650038039&type=3 Let me know if you can see these. It's not as neat as your board but I was extremely maticulous when wiring everything. I a great maker but not much of computer guy.

@nelutrifoi 8 лет назад

Thank you

@chandrikachaudhari6305 8 лет назад

we can use common anode led ?

@stevemanley3685 8 лет назад

Yes, my circuit design uses common anode LED's.

@alirifaat645 4 года назад

Hi, can I get more details on spi

@stevemanley3685 4 года назад

Hi, What is it you want to know exactly? If you want to know how SPI works, then I would suggest you use your favourite web search engine to seek a full tutorial. If you want to know how I'm using it, then all I can say is that I am using it to send out data only to a bunch of shift registers. First it enables all the shift registers to accept new data, then It sends all the RED GREEN BLUE data for all RGB shift registers, then sends the ANODE data. All this goes out 1 byte (8bits) at a time until all data is transferred.Then it toggles all the shift register latch pins to set the new data, then disables the shift registers ready for the next set of data. It does all this on a timer every 125uS (8KHz). Does this help?

@alirifaat645 4 года назад

@@stevemanley3685 Yes, I want a way to work the data transfer

@alirifaat645 4 года назад

@@stevemanley3685 Possible data transfer details as you do

@stevemanley3685 4 года назад

ali rifaat I don’t understand what you are asking. If you want to change something, then you will need to figure it out for yourself. This is what Dagon did and he implemented better animations and archived a better colour range. He the shared his code with me.

@alirifaat645 4 года назад

@@stevemanley3685 @Steve Manley The error I have is that the Arduino is not working 8x8x8

@santiagoluque1343 6 лет назад

You speak español???

@stevemanley3685 6 лет назад

Sorry, I do not.

@santiagoluque1343 6 лет назад

Exelen job steve

@stevemanley3685 6 лет назад

Thank you

@smileapx 8 лет назад

Великолепно

@stevemanley3685 8 лет назад

+smileapx Thanks

@arek462 8 лет назад

Does cube display only 8 colors?

@stevemanley3685 8 лет назад

arek462 with the software that is currently written, yes. However, if and when I get around to writing the bit angle modulation routines, then it will be capable of many many more colours.

@arek462 8 лет назад

I see. So it just depends on software. Why did you choose bit angle modulation and "normal" shift register instead for example TLC5940 ??

@stevemanley3685 8 лет назад

arek462 Good question! Cost, mainly, less of a challenge also. Those chips use 12 bits for resolution, so an Arduino uno might not have enough memory to map 512 LEDs. If I were to build another cube, I would do several things different. Choice of microcontroller, driver chips, fewer pcbs. Better jigs now I have a 3D printer and cnc router.

@arek462 8 лет назад

Thanks! So, you use one data port of arduino to send information to all 65 shift register cascaded? I got one question about pull up resistor next to mosfet transistors. So, if i understood it right, high state on 74hc out means 0V on transistor gate and low state on 74hc out means 5V on gate? Is it right? Then Did you use P-channel depletion type mosfet??

@stevemanley3685 8 лет назад

arek462 Yes P-channel. Similar circuit to Kevin Darrah's cube design, except he uses an additional transistor to cope with the signal inversions, I do the inversion in software. Kevin uses BAM with a detailed explanation of how it works, if your interested.

@mattpaul4226 10 лет назад

Can I buy the PCB Boards anywhere?

@stevemanley3685 10 лет назад

That's an interesting question, I had to order the minimum of 5 boards. Two are spoken for so it's possible the I could sell a couple of them. It wasn't my intention to make them to be sold but it would allow me to re-coop some of the expense.

@mattpaul4226 10 лет назад

***** Well please let me know how much and I will send the money. Trying to build one of these and following your advice. Never done anything like this, hope it goes well.

@mattpaul4226 10 лет назад

***** Sorry its been a few busy weeks. I don't know how to get you my email without putting it in the comments. Would like to buy the board. Live in the States but don't think shipping will be that bad. Just let me know what to do. Thanks Matt

@stevemanley3685 10 лет назад

Matt Paul Likewise, I have no desire to publish my address so not sure how we do this. I would also need to investigate the shipping costs.

@stevemanley3685 10 лет назад

Matt Paul You can obtain my direct e-mail address from Clive Maxfield who is the editor for my blogs on EETimes max@clivemaxfield.com