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Post by svart on Mar 23, 2015 6:51:11 GMT -6
Finally got some time over the weekend to work on the metalwork for the chassis. I built the forms for pressing the dimple to go under the DAC board opamps to heatsink them off.  |
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Post by Johnkenn on Mar 23, 2015 13:10:51 GMT -6
Nice! Are you gonna silkscreen the front?
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Post by svart on Mar 23, 2015 13:22:44 GMT -6
Nice! Are you gonna silkscreen the front? Definitely silkscreening the back. Still doing the bezel on the front, which means that it might be silkscreened, or it might be machined. I have the general shape and fitment done, but not the final looks yet. I've been putting all my time into getting a solid electrical design going and slacking on the mechanicals/looks of it. |
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Post by svart on Mar 23, 2015 13:42:19 GMT -6
So with the new dimple, the opamps now run around 120F after 20 minutes of running. This is a great 30F drop in temps. I'm going to test this unit in the next few days and if it runs well in real-world testing, I'm probably going to box it up and ship it to Johnkenn for testing. I've also been working on the code some, and think I have it working in the most basic configuration right now, but need to load a couple boards with the code and try it out before I can move to the next task of a unified code that can work on both boards. I'm not sure it's entirely possible, but I'm going to try it anyway. |
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Post by Johnkenn on Mar 23, 2015 14:14:53 GMT -6
Bring it on! Can't wait to hear it...
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Post by kcatthedog on Mar 23, 2015 14:58:43 GMT -6
how come you southern guys, have all the fun  |
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Post by svart on Mar 23, 2015 15:00:16 GMT -6
Another sneak peak..  |
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Post by stratboy on Mar 27, 2015 21:12:04 GMT -6
I don't know if you have resolved the master/slave issue yet, but here's an idea: bring the full product to market first, AD/DA. Then, after your first run sells out, rewrite the code and bring out the upgrade feature in V2. That way, you meet your deadline, and have a new feature/lower price point as your product gets better known in the market. You won't be disappointing anyone who buys first round, and no one who buys the full box is going to miss not being able to go backwards anyway.
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Post by Johnkenn on Mar 28, 2015 8:10:35 GMT -6
Hey svart - that pic doesn't work |
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Post by svart on Mar 28, 2015 10:56:40 GMT -6
Hey svart - that pic doesn't work I see. it was linked from facebook, so I dunno why it's not showing up anymore. I'll get a better pic anyway. |
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Post by Johnkenn on Mar 28, 2015 11:01:23 GMT -6
Facebook links have been flaky here...not sure what's up.
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Post by jcoutu1 on Mar 28, 2015 11:19:27 GMT -6
Pic is working for me.
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Post by Johnkenn on Mar 28, 2015 11:21:00 GMT -6
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Post by jcoutu1 on Mar 28, 2015 11:25:48 GMT -6
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Post by jcoutu1 on Mar 28, 2015 11:27:42 GMT -6
Well go figure. Now neither one are showing up for me.
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Post by svart on Mar 28, 2015 12:10:23 GMT -6
ooooh spooky.
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Post by mulmany on Mar 28, 2015 12:16:48 GMT -6
Works for me on my phone.
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Post by LesC on Mar 28, 2015 22:05:24 GMT -6
Same here, works on my android phone. But not on my windows laptop.
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Post by tonycamphd on Mar 28, 2015 23:22:24 GMT -6
Well go figure. Now neither one are showing up for me. dude! you broke it man....  |
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Post by Johnkenn on Mar 30, 2015 14:31:14 GMT -6
Damn iPhones. I still can't see it. What is it?
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Post by svart on Mar 30, 2015 14:37:10 GMT -6
Johnkenn I dunno, FB shows it but when I try to look at it from here it says that it's not found. I wonder if they block hotlinking now? Here's a better pic taken from a work camera instead of camera phone.. 
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Post by tonycamphd on Mar 30, 2015 14:44:06 GMT -6
damn! you're close, looking good!
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Post by svart on Mar 30, 2015 14:57:47 GMT -6
So I might as well do an update.
I finished another tool for the chassis work, to do secondary holes for the coax connector support screw. The RCA type jacks that folks use seem to always bend or break from the board. Even the TI demo board has those shitty connectors and I bent mine on it too. This board has connectors that have a supporting screw that takes the actual force of the plug insertion rather than letting solder try to hold it.
I still need to finish tweaking the front panel cutout jig. it works, but some of the dimensions need adjusting.
I also found a tweak to keep the chips a bit cooler, electrically. Not by much but it helps.
I also changed my bootloader to allow the microcontrollers to run on their internal oscillators rather than external crystals. They aren't as stable as crystals but the micros don't control ANY of the timing system on the boards, nor do they handle any time-critical operations.
I've built another test board so I can start getting the DAC microcontroller debugged before I get to writing the next portion of the firmware, which is the dual master arrangement.
I still have to get the front bezel finished up. I've done full sized printouts of the design and have noticed some things to tweak for better usability like opening up the LCD cutout chamfer for better viewing angle, etc. I hope to be talking with a machine shop soon to have a few mocked up for me to test in a few weeks.
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Post by jcoutu1 on Mar 30, 2015 15:11:36 GMT -6
So I might as well do an update. I finished another tool for the chassis work, to do secondary holes for the coax connector support screw. The RCA type jacks that folks use seem to always bend or break from the board. Even the TI demo board has those shitty connectors and I bent mine on it too. This board has connectors that have a supporting screw that takes the actual force of the plug insertion rather than letting solder try to hold it. I still need to finish tweaking the front panel cutout jig. it works, but some of the dimensions need adjusting. I also found a tweak to keep the chips a bit cooler, electrically. Not by much but it helps. I also changed my bootloader to allow the microcontrollers to run on their internal oscillators rather than external crystals. They aren't as stable as crystals but the micros don't control ANY of the timing system on the boards, nor do they handle any time-critical operations. I've built another test board so I can start getting the DAC microcontroller debugged before I get to writing the next portion of the firmware, which is the dual master arrangement. I still have to get the front bezel finished up. I've done full sized printouts of the design and have noticed some things to tweak for better usability like opening up the LCD cutout chamfer for better viewing angle, etc. I hope to be talking with a machine shop soon to have a few mocked up for me to test in a few weeks. Got a name yet? If you wait any longer, it's forever going to be known as the Svartbox, if it isn't already. |
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Post by svart on Mar 30, 2015 15:43:50 GMT -6
So I might as well do an update. I finished another tool for the chassis work, to do secondary holes for the coax connector support screw. The RCA type jacks that folks use seem to always bend or break from the board. Even the TI demo board has those shitty connectors and I bent mine on it too. This board has connectors that have a supporting screw that takes the actual force of the plug insertion rather than letting solder try to hold it. I still need to finish tweaking the front panel cutout jig. it works, but some of the dimensions need adjusting. I also found a tweak to keep the chips a bit cooler, electrically. Not by much but it helps. I also changed my bootloader to allow the microcontrollers to run on their internal oscillators rather than external crystals. They aren't as stable as crystals but the micros don't control ANY of the timing system on the boards, nor do they handle any time-critical operations. I've built another test board so I can start getting the DAC microcontroller debugged before I get to writing the next portion of the firmware, which is the dual master arrangement. I still have to get the front bezel finished up. I've done full sized printouts of the design and have noticed some things to tweak for better usability like opening up the LCD cutout chamfer for better viewing angle, etc. I hope to be talking with a machine shop soon to have a few mocked up for me to test in a few weeks. Got a name yet? If you wait any longer, it's forever going to be known as the Svartbox, if it isn't already. Gonna call it the Schwartz. "I see your Schwartz is as awesome as mine!" Not really, but I'm working on a name still.. |
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