latigid on

Looking good, all components are fitting well and it perfectly aligns with the AOUT_NG. I would like to test my one first (not yet as Musikmesse is this weekend) but if anyone would like one I will offer them at USD5 + shipping.

Great work and good perseverance!

A few layout modifications and I have ditched the ground isolation. An LC filter was added which might be useful for a SPSU or DC-DC converter. Everything is labelled. I think I will go through http://www.dfrobot.com/index.php?route=product/category&path=135_134 seeing as they do DHL shipping for a cheap price. Final thoughts?

I have found another: http://www.dfrobot.com/index.php?route=product/category&path=135_134 The upside with these guys is DHL shipping is reasonable (~$16)

Hello, don't forget the LCD window!

There was a thread a few years back discussing PCB proto services, perhaps it is time to revisit. I would like to hear about any user experiences, including things like price, quality, turn-around time, shipping costs and so on. I have found a few so far: http://oshpark.com/ * USD5 per square inch, for 3 copies. Flat mailer is USD8 worldwide, shipping from US. Directly parses EAGLE files and quality looks high (ENIG). http://www.elecrow.com/ * 5cm * 5cm USD9.9 / 5cm * 10cm USD23.9 / 10cm * 10cm USD23.9, 10 copies. ENIG more expensive, but you can choose a PCB colour for free. http://imall.iteadstudio.com/open-pcb/pcb-prototyping.html * Basically the same pricing structure as above, more for colours http://www.seeedstudio.com/depot/fusion-pcb-service-2-layers-p-835.html?cPath=185 * Again, similar pricing structure (5*5 cm USD10, 10*10 cm USD25). Free shipping is available for orders over $50, you can combine with components or Arduino etc.

You can buy triple output PSU modules from Mouser but then you will need to enclose them. I bought the MeanWell P25A14E for +5/+15/-15, I haven't hooked up the 15V rails yet but I hope to power the AOUT_NG inside my SEQ at some point. Regulators have a certain voltage drop to contend with, which makes using a LM805 with a +5 V regulator edit: switching power supply impossible. Okay if your voltage is slightly higher.

For that value it would have to be electrolytic. A general rule for voltage is three times the expected maximum, so 50 V for +12 V

Nice, any tests so far?

Many thanks, I have picked up the knobs today!

No problem, you already have 14 parameter layers in SEQ V4.

Fertig! :)

It has a maximum output of 1 A, is this enough to power an MB-6582?

I am looking at a Mouser order right now, the PT78ST105H is obsolete, but there seems to be a pin compatible replacement with slightly better ripple characteristics and a lower input voltage (7 V, if you need it). It is # 78SR105HC which is currently being made obsolete. Mouser have under 500 units remaining so get in quick (or find another alternative)!

Perhaps you can test the IO transfer by connecting J19 (without the buffer board) directly to the AOUT module?

orange_hand, this may also be of interest to you: (would depend on your usecase)

Yes, I was thinking this. Perhaps it would be better to use a 15V supply, then it shouldn't have trouble with 12V.

Hi, I haven't routed a board before, so I would appreciate any advice! The top ground plane has been omitted for clarity. Seeing as I am using an AOUT_NG, my design has the same dimensions and mounting holes. I would stack the AOUT on top of this one with M/F standoffs. The eight analogue outs and gates are brought out to a DB-25 connector. The gates are either buffered or amplified to approximately 12V, selectable via jumpers. I am using a 100k/71.5k voltage divider for approximately 2.4x gain. At a 15V supply a 100k/50k combination would provide a gain of 3. One could also mount a variable resistor instead of the jumpers for more control. This works on paper, but I am wondering if the op amp will swing right up to its rails? There is a spare buffer for the DIN sync/start connections also. I haven't figured out libraries in Eagle yet so some of the parts aren't quite right. <<Hmm, they probably need current-limiting resistors too....>> I am not sure how to power things inside my SEQ yet. Building a linear triple output PSU looks to be the best, but I may try a switch- mode unit. In this case power would be supplied at J1 and a daisy chain output is at J15 on the right-hand side. Perhaps it isn't quite the right thing to do, but I have isolated the grounds for the AOUT and gate signals. The ground for the gates can be tied to the same ground as the AOUT signals. Lastly, I have included pins for a DC-DC converter in case the SPSU doesn't work out. The two footprints on the top left of the board are for the muRata NMV0512SC and the Recom RS-0512D. It might be wise to include an inductor-capacitor circuit which can supposedly reduce the ripple voltage down to 5 Vpp. Thanks for looking and please share your thoughts!