tag:blogger.com,1999:blog-3584132508185165153.post5159107611637533449..comments2024-03-19T00:03:28.879-04:00Comments on My Commentary and Technical help: 8x8x8 LED cube kit completedBob Davishttp://www.blogger.com/profile/04602803109106077023noreply@blogger.comBlogger16125tag:blogger.com,1999:blog-3584132508185165153.post-5393573970092073792021-06-21T09:10:03.553-04:002021-06-21T09:10:03.553-04:00Roycon, I am not sure what you mean by "heade...Roycon, I am not sure what you mean by "header pins" but a DC voltmeter will not see the pulses. -BobBob Davishttps://www.blogger.com/profile/04602803109106077023noreply@blogger.comtag:blogger.com,1999:blog-3584132508185165153.post-74372617999885612672021-06-17T05:08:06.667-04:002021-06-17T05:08:06.667-04:00Hello Bob. I've install components, but when t...Hello Bob. I've install components, but when tested, I'm only getting .4v at all header pins. Main power led Cube s coming on and I have normal voltage power jack, but losing after there...please help.Roycon47https://www.blogger.com/profile/08085238727233220394noreply@blogger.comtag:blogger.com,1999:blog-3584132508185165153.post-46141789095585744832020-11-27T11:04:01.166-05:002020-11-27T11:04:01.166-05:00I do not know what would cause that problem. Chec...I do not know what would cause that problem. Check to make sure all the IC's are oriented correctly? -BobBob Davishttps://www.blogger.com/profile/04602803109106077023noreply@blogger.comtag:blogger.com,1999:blog-3584132508185165153.post-71666501074696024872020-11-25T17:25:35.455-05:002020-11-25T17:25:35.455-05:00Hello Bob! Looks like you are the man I have been ...Hello Bob! Looks like you are the man I have been looking for! I have assembled a cube exactly as you have above but when I switched it on I just get 10 static columns illuminated in the shape of a 0, if looking top down on the cube. No transitions at all. Do you have any idea where I should look to debug this?<br />I will be investing in your book as want to get this hooked up to an arduino but first need to get the thing working!<br />Any help would be greatly appreciated.<br />TimAnonymoushttps://www.blogger.com/profile/11249146522285624478noreply@blogger.comtag:blogger.com,1999:blog-3584132508185165153.post-41255419429175456282020-06-26T20:43:20.244-04:002020-06-26T20:43:20.244-04:00The 74HC374 is a latch, it works best with the lat...The 74HC374 is a latch, it works best with the latch selector. The 74HC573 is a transparent latch that allows noise through, like changing the data bits, when transparent. <br /><br />The resistors make the display much brighter.Bob Davishttps://www.blogger.com/profile/04602803109106077023noreply@blogger.comtag:blogger.com,1999:blog-3584132508185165153.post-758451356900585622020-06-26T19:12:08.211-04:002020-06-26T19:12:08.211-04:00Hello Bob can I ask you some questions?
1-exacly ...Hello Bob can I ask you some questions?<br /><br />1-exacly why did you replaced the 74hc573 whit the 74hc574<br /><br />2-what's the use of the resistor array?, I don't see any important role of this part in the circuit<br /><br />Thanks for your attention Anonymoushttps://www.blogger.com/profile/10294292249986769769noreply@blogger.comtag:blogger.com,1999:blog-3584132508185165153.post-32380478056489665332020-06-26T17:21:38.672-04:002020-06-26T17:21:38.672-04:00hello bob, I have a question, exactly why we have ...hello bob, I have a question, exactly why we have to change the 74hc753 by the 74hc754 ic´s?Anonymoushttps://www.blogger.com/profile/10294292249986769769noreply@blogger.comtag:blogger.com,1999:blog-3584132508185165153.post-1754124608412984172017-05-05T16:33:59.272-04:002017-05-05T16:33:59.272-04:00RachelM - I cannot figure out the problems from th...RachelM - I cannot figure out the problems from the descriptions. However the layers interact in strange ways. If a LED is bad in a layer it can affect the entire layer. Perhaps picture would help? -BobBob Davishttps://www.blogger.com/profile/04602803109106077023noreply@blogger.comtag:blogger.com,1999:blog-3584132508185165153.post-32022690054661483452017-05-03T22:55:26.260-04:002017-05-03T22:55:26.260-04:00Bob, thank you for posting this information. I bou...Bob, thank you for posting this information. I bought your book and it is very helpful for this retrofit.<br /><br />I have a few amateur issues I was wondering if you could help me with. I have not started the retrofit yet so I have the original kit setup:<br /><br />1. One entire layer (third row) is not lighting. I checked the ground connection to the chip/resistor and multimeter is showing good connections. I checked the layer itself if it works and all the LEDs light up. Lastly replaced the chip with a spare 573 but still didn't work. Any ideas?<br /><br />2. I'm having ghosting issues on 3 layers. I checked the LED cube itself and checked the LEDs individually. I found that the LEDs worked independently but when hooked up to the board, 3 layers ghost. Do you have any ideas as to where on the board to check?<br /><br />Thank you for your time. Hope to let you know if the retrofit works on my end.RachelMhttps://www.blogger.com/profile/08379829719918809707noreply@blogger.comtag:blogger.com,1999:blog-3584132508185165153.post-18519967729770635432017-04-28T13:05:32.572-04:002017-04-28T13:05:32.572-04:00Both the picture and schematic look correct to me?...Both the picture and schematic look correct to me? Where do they differ?Bob Davishttps://www.blogger.com/profile/04602803109106077023noreply@blogger.comtag:blogger.com,1999:blog-3584132508185165153.post-87486995494697354372017-04-20T15:47:23.284-04:002017-04-20T15:47:23.284-04:00Is there anyway you can tell us what the wires are...Is there anyway you can tell us what the wires are actually connecting. The picture looks different from the schematic. Or should I just follow the schematic?Anonymoushttps://www.blogger.com/profile/15002733878792418263noreply@blogger.comtag:blogger.com,1999:blog-3584132508185165153.post-89252402551789531402017-04-16T22:24:46.297-04:002017-04-16T22:24:46.297-04:00Hello,
Don't know if you will see this, but I...Hello,<br /><br />Don't know if you will see this, but I'm new to reading schematics but it doesn't seem like the schematic matches the picture and the picture doesn't seem to match the youtube video. If it isn't too much to ask, could you tell me what the each white wire is actually connecting together? It's a little hard to tell.<br />Also, are 4 and 5 on the SN74L... connected and then connected to ground?Anonymoushttps://www.blogger.com/profile/15002733878792418263noreply@blogger.comtag:blogger.com,1999:blog-3584132508185165153.post-24314940018581317822016-02-02T07:56:16.702-05:002016-02-02T07:56:16.702-05:00Connecting it to an Arduino requires an adapter. ...Connecting it to an Arduino requires an adapter. It is detailed in my book "Arduino LED Cube Projects"..Bob Davishttps://www.blogger.com/profile/04602803109106077023noreply@blogger.comtag:blogger.com,1999:blog-3584132508185165153.post-29798653672755869832016-01-31T08:36:11.322-05:002016-01-31T08:36:11.322-05:00Hi there could you please show me how it is connec...Hi there could you please show me how it is connected to the arduinother many thanks in advanceAnonymoushttps://www.blogger.com/profile/11895087507293602390noreply@blogger.comtag:blogger.com,1999:blog-3584132508185165153.post-66349010957898380942015-05-28T07:49:44.394-04:002015-05-28T07:49:44.394-04:00Is the reversed order bottom to top? If so it is ...Is the reversed order bottom to top? If so it is the common cathode jumpers on the back side.Bob Davishttps://www.blogger.com/profile/04602803109106077023noreply@blogger.comtag:blogger.com,1999:blog-3584132508185165153.post-42524963877085862212015-05-17T09:51:53.143-04:002015-05-17T09:51:53.143-04:00Bob i have a question. I have built the same led c...Bob i have a question. I have built the same led cube you built from the same kit. All leds are working but in the wrong order. Were would you start troubleshooting? I have posted video of what my cube is doing on fb. My name it matt pickel. My profile picture is of the cartoon brain from pinky and the brain. Anonymoushttps://www.blogger.com/profile/17904795457749868853noreply@blogger.com