borfo Posted August 25, 2014 Report Share Posted August 25, 2014 (edited) OK - thanks. I'll take another look at the schematic - it's a bit of a complex schematic to read with all the leds, but I guess I'll take a second look and see if I can figure it out. ...or maybe I'll just go over all the U1 and U2 IC leg soldering again. Edited August 25, 2014 by borfo Quote Link to comment Share on other sites More sharing options...
borfo Posted August 25, 2014 Report Share Posted August 25, 2014 Hm... Just went over U1 and U2, as well as all the connected resistors and caps - they all look fine, no shorts between legs of the ICs, etc. Still getting the same pattern on the 7-segment LEDs. Quote Link to comment Share on other sites More sharing options...
CJ55 Posted August 27, 2014 Report Share Posted August 27, 2014 Hi, I am also interested in a TPD PCB. Hope you have still one available. Thanks! Quote Link to comment Share on other sites More sharing options...
electrodancer Posted August 28, 2014 Report Share Posted August 28, 2014 can you hook me up with another pcb the ledmatrixes and the segment displays ? Quote Link to comment Share on other sites More sharing options...
ilmenator Posted August 31, 2014 Author Report Share Posted August 31, 2014 can you hook me up with another pcb the ledmatrixes and the segment displays ? I could send you another complete kit - I am not going to split what I have already packed because I will be moving soon and most of my electronic inventory is already in boxes. I'll be traveling to Germany on September 7th so you could get extra cheap shipping if you are quick. Quote Link to comment Share on other sites More sharing options...
ilmenator Posted August 31, 2014 Author Report Share Posted August 31, 2014 The 7-segment LED numbers are these ones: http://ca.mouser.com/ProductDetail/Kingbright/SC39-12GWA/?qs=JpELLRhtMc3ti3iuxtHgpw== You are correct, your soldering is probably ok. However, you picked the wrong 7-segment displays, the pinout on yours is different. You need those that have common cathodes on pins 3 and 8 like the ones from Reichelt. On the ones you have, pins 3 and 8 are connected to segments c and g - the ones that are lit in the picture above. Quote Link to comment Share on other sites More sharing options...
borfo Posted September 1, 2014 Report Share Posted September 1, 2014 (edited) Hm. Thanks - I was starting to wonder if that might be the problem... Is that something I can fix with the BPM_DIGITS_COMMONX_PIN settings in the config file, or am I going to have to pull these and install new ones? Argh... How dumb. I found the SC39-12's on Mouser, looked at the datasheet for the part at Reichelt, saw that the SC39-12s were listed, and just assumed they were the same without looking any more closely. I guess these are the right ones? http://ca.mouser.com/ProductDetail/Kingbright/SC39-11GWA/?qs=%2fha2pyFadujZZmhir7g8a4MDNifw%252bt1YLT0eP6qwECY%3d Mouser part #604-SC39-11GWA Edited September 1, 2014 by borfo Quote Link to comment Share on other sites More sharing options...
ilmenator Posted September 1, 2014 Author Report Share Posted September 1, 2014 Yes, this data sheet looks ok. And no, it cannot be fixed in software. You might cut some traces and run little wires instead, but this would require you to understand the schematics and find the right traces on the PCB - and then figure out where to cut them for least effort. Quote Link to comment Share on other sites More sharing options...
borfo Posted September 1, 2014 Report Share Posted September 1, 2014 (edited) I'll take a look and see what I'd have to reroute, but I suspect there would be a lot of rerouting involved. Probably easier to pull and replace them. Thanks a lot for your help, it's much appreciated. You may want to put a note in the Wiki page BOM that the common cathodes have to be on pins 3 and 8 - I haven't used LED digits for much before, it didn't occur to me that the common cathodes might be located on different pins. Edited September 1, 2014 by borfo Quote Link to comment Share on other sites More sharing options...
borfo Posted September 2, 2014 Report Share Posted September 2, 2014 (edited) Rather than totally destroying this board trying to pull the LED digits without a solder rework station, maybe the thing to do here is just get another PCB... Do you have PCBs or kits still available, Ilmenator? If so, I'll just build another one and maybe I'll pass this one along to someone who doesn't care too much about the digits. In other news, blowtorches don't make great substitutes for solder rework tools. haha. Edited September 2, 2014 by borfo Quote Link to comment Share on other sites More sharing options...
ilmenator Posted September 2, 2014 Author Report Share Posted September 2, 2014 I think that is a wise decision for now. I have sent you a PM. And yes, a few full kits are still available. Quote Link to comment Share on other sites More sharing options...
ilmenator Posted January 25, 2015 Author Report Share Posted January 25, 2015 I have a new batch (10 pieces) of TPD boards available, this time in red color. PM me or leave a note in this thread if you're interested. Shipping from Germany, details in the Wiki. Quote Link to comment Share on other sites More sharing options...
Rowan Posted January 26, 2015 Report Share Posted January 26, 2015 I have a new batch (10 pieces) of TPD boards available, this time in red color. PM me or leave a note in this thread if you're interested. Shipping from Germany, details in the http://www.midibox.org/dokuwiki/doku.php?id=tpd_pcb'>Wiki. I'll take one board please. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.