digger945 Posted April 13, 2011 Report Share Posted April 13, 2011 Quote Link to comment Share on other sites More sharing options...
Kerry Posted April 13, 2011 Report Share Posted April 13, 2011 I don't mind doing this. Please PM me if you want in on the SMD version of the attenuator with how many boards you would like and I'll post the totals in this thread. Per Kevin, they will be approximately $15.28 + shipping depending on the final count. Quote Link to comment Share on other sites More sharing options...
grawk Posted April 13, 2011 Report Share Posted April 13, 2011 for fully assembled boards? I'll take 4 Quote Link to comment Share on other sites More sharing options...
Kerry Posted April 13, 2011 Report Share Posted April 13, 2011 (edited) Sorry. This didn't include assebmly / parts / etc. If enough people are interested in assembed boards, we can look into that as well. Please let me know if you are interested in "Assembled", "Boards Only" or "Either" (include preference). Edited April 13, 2011 by Kerry Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted April 13, 2011 Report Share Posted April 13, 2011 (edited) 2 please, boards only (or boards plus relays) Edited April 13, 2011 by luvdunhill Quote Link to comment Share on other sites More sharing options...
ujamerstand Posted April 13, 2011 Report Share Posted April 13, 2011 I would be interested in boards. I've been waiting for a good, reliable, relay based attenuator solution. If we are doing a GB on the relays I'd be interested in that as well. Quote Link to comment Share on other sites More sharing options...
deepak Posted April 13, 2011 Report Share Posted April 13, 2011 Sorry. This didn't include assebmly / parts / etc. If enough people are interested in assembed boards, we can look into that as well. Please let me know if you are interested in "Assembled", "Boards Only" or "Either" (include preference). pm sent Quote Link to comment Share on other sites More sharing options...
cetoole Posted April 13, 2011 Report Share Posted April 13, 2011 In for either, say 4 sets. Quote Link to comment Share on other sites More sharing options...
Kerry Posted April 13, 2011 Report Share Posted April 13, 2011 (edited) Seems like we could use different voltage relays (other that 12V) provided the coil current is under 500mA. Just wanted to double check this. EDIT: Also the digital voltage could support 5V as well. EDIT2: Nevermind. I see the address ID jumper. Edited April 13, 2011 by Kerry Quote Link to comment Share on other sites More sharing options...
manaox2 Posted April 13, 2011 Report Share Posted April 13, 2011 In for two assembled boards. Quote Link to comment Share on other sites More sharing options...
El_Doug Posted April 13, 2011 Report Share Posted April 13, 2011 The programming is way out of my league - I'd be in for 2 boards, assembled or blank, if I could get pointed in the right direction as far as control Quote Link to comment Share on other sites More sharing options...
Kerry Posted April 13, 2011 Report Share Posted April 13, 2011 (edited) PLEASE SEE POST FOR THE LATEST COUNTS. Here's where we currently are: Name - Count - Preference grawk - 4 - A Driftwood - 6 - EA luvdunhill - 2 - B ujamerstand - 4 - B deepak - 3 - A cetoole - 4 - E manaox2 - 2 - A el_doug - 2 - E DouglasQuaid - 2 - EA jgazal - 2 - A Lil Knight - 4 - A nattonrice - 4 - E kevin gilmore - 4 - EA looser101 - 6 - E chinsettawong - 2 - E Kerry - 6 - B Fing - 4 - A Preferences: A = Assembled; B = Board Only; E = Either; EA = Either-Assembled Preferred If I have it wrong here or you would like to change something please PM me. Just a reminder. Please PM me all requests so we can keep the thread clean. I'll post an update at the end of the day (will be on vacation soon so I hope I can keep up). Also, depending on the pricing for assembly we may or may not end up doing this. I will reach out tomorrow for pricing based on a few different quantities. Also, sounds like a group buy for relays might be a good idea as well. Edited April 19, 2011 by Kerry Quote Link to comment Share on other sites More sharing options...
ujamerstand Posted April 13, 2011 Report Share Posted April 13, 2011 EDIT2: Would it be useful to add some address jumpers so that you could control the left and right channels of a balanced amp separately? One jumper per board might be enough for this. This would be quite useful. I could imagine attenuating two separate streams to two different people. Or do channel matching for testing headphones. Quote Link to comment Share on other sites More sharing options...
Grahame Posted April 13, 2011 Report Share Posted April 13, 2011 ^ or use as a balance control. Quote Link to comment Share on other sites More sharing options...
chinsettawong Posted April 13, 2011 Report Share Posted April 13, 2011 (edited) Please count me in for 2 sets of PCB or assembled version. Wachara C. Edited April 13, 2011 by chinsettawong Quote Link to comment Share on other sites More sharing options...
n_maher Posted April 13, 2011 Report Share Posted April 13, 2011 I thought kevin said that the surface mount version would have to beat machine assembled? Quote Link to comment Share on other sites More sharing options...
kevin gilmore Posted April 13, 2011 Author Report Share Posted April 13, 2011 depends on how good you are and if you buy the tacking glue. I can assemble it. I DON'T really want to assemble it. Quote Link to comment Share on other sites More sharing options...
Fing Posted April 13, 2011 Report Share Posted April 13, 2011 4 x assembled boards (+ relays) for me please. Quote Link to comment Share on other sites More sharing options...
digger945 Posted April 13, 2011 Report Share Posted April 13, 2011 Is there a place for onboard pull up resistors for the 8574? Quote Link to comment Share on other sites More sharing options...
kevin gilmore Posted April 13, 2011 Author Report Share Posted April 13, 2011 (edited) yep, on the back. look at the pdf file. updated picture http://gilmore.chem.northwestern.edu/attenuator5.jpg Edited April 13, 2011 by kevin gilmore Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted April 13, 2011 Report Share Posted April 13, 2011 You might consider longer landings for the relays, if it's even possible. That greatly aids assembly. Quote Link to comment Share on other sites More sharing options...
kevin gilmore Posted April 13, 2011 Author Report Share Posted April 13, 2011 (edited) relay pads are 1.2 x 2.2 mm as specified by omron... what size do you want? edit: i'm thinking that programming this is gonna be very easy http://gilmore.chem.northwestern.edu/touchpanel.jpg Edited April 13, 2011 by kevin gilmore Quote Link to comment Share on other sites More sharing options...
DouglasQuaid Posted April 13, 2011 Report Share Posted April 13, 2011 I don't know about the resistors, but I've hand-wired G6k-2F relays before. They're the same distance between pins as the G6SK, and the same thickness of the leads, just two less pins. Soldering them to a pcb isn't really that bad. So bare boards are perfectly fine with me. Quote Link to comment Share on other sites More sharing options...
Kerry Posted April 14, 2011 Report Share Posted April 14, 2011 (edited) PLEASE SEE POST FOR THE LATEST COUNTS. Here the new board counts: Name - Count - Preference grawk - 4 - A Driftwood - 6 - EA luvdunhill - 2 - B ujamerstand - 4 - E deepak - 2 - A cetoole - 4 - E manaox2 - 2 - A el_doug - 2 - E DouglasQuaid - 2 - EA jgazal - 2 - A Lil Knight - 4 - A nattonrice - 4 - E kevin gilmore - 4 - EA looser101 - 6 - E chinsettawong - 2 - E Kerry - 6 - B Fing - 4 - A blubliss - 4 - EA n3rdling - 4 - EA guzziguy - 2 - E Pars - 2 - B Nebby - 4 - EA TOTAL 76 Preferences: A = Assembled; B = Board Only; E = Either; EA = Either-Assembled Preferred Please let me know if I've made any mistakes. Also, can anyone pull a BOM together real quick. It doesn't have to be perfect, but I need one to send over to the manufacturer to get a quote on the assembly. I would do it, but I'm not going to have time tonight. Thanks Edited April 19, 2011 by Kerry Quote Link to comment Share on other sites More sharing options...
ujamerstand Posted April 14, 2011 Report Share Posted April 14, 2011 (edited) which resistor are we using here? These? Also relays? I'll quickly put one together. Edited April 14, 2011 by ujamerstand Quote Link to comment Share on other sites More sharing options...
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