latigid on

Heh, saw this on Muff's and was thinking the same. But the Launchpad is about the same price (8x8) and has extra buttons and tri-state LEDs. Still need to add an Arduino controller... You can buy the 4x4 Trellis PCBs for $8 each in quantity, but still only single LEDs. The silicone pads go to $4 a piece in quantity. https://www.adafruit.com/products/1616 https://www.adafruit.com/products/1611 Still, it's half the price of the Sparkfun one. https://www.sparkfun.com/products/7835 Sparkfun's PCB costs the same and is RGB LED compatible, but is unpopulated component-wise. https://www.sparkfun.com/products/8033 If the silicone pads could be had cheaply, the next thing would be to design a full 16x16 + X board or smaller ones that connect together.

It will also depend on the power option used. Expect less heat in systems using switching 5V regulators.

Running with a disconnected fan here, will try to measure the operating temperature sometime.

LOL! I'll have what he's having :) But on topic, I had a few similar thoughts recently. It started by finding a junk set of old building control panels which happen to be a matrixed row of 16 duo LEDs bussed to an IDC connector. Sadly I only have 12 of the boards and I'm not sure if the BLM could support two pages of 16x8. TK mentioned that it would be impossible to maintain parallel firmware versions, but I wonder if this is now on the table again after the new Launchpad work, and also in view of the fact that only one 16x16+x currently exists. My thoughts also turned to the Stribe controller: surely that would make a great switch row and quantizing to 17 columns shouldn't be too bad(?) Or to go one step further: if you need a big custom PCB, why not make a capacitive switch matrix too? This is already done in the Make Noise René and Pressure Points for example. You lose the tactile feedback but it's not too different from a tablet device. Add a few diodes and LEDs and you're there with your BLM CS. With clever routing you might also end up with smaller 4x4 or 8x8 matrices that would bring down the cost. There are a few chips that do all of the conversion for you, but only upto an 8x8 matrix. Yes you could look at programming your own touch screen, but IMO, once you've got a nice screen, battery, case and dealt with all of the wiring and programming you could have saved time (and probably money too) and picked up a small iPad or Android device. EDIT: I see that you want a more permanent solution with wired LAN, hope you don't mind my assorted ramblings too!

Sorry, I meant in a more general sense that others complained about headphone noise etc. Anyway, I'm happy with the MB-6582 :)

Doesn't the test tone app just use the PIC as an oscillator to test if all of the hardware connections work (i.e. without a SID)?

So it seems these are listed as "discontinued" on ModeMachines Possibly because of poor build quality and lack of reliable software Here is a photoset if you ever wanted to see inside Btw, doesn't their new sequencer thingee look pretty damn familiar to the 16x16+X BLM?? EDIT: seems I can't count, it only has 12 rows going down.

But does it do anything else? Did you upload the correct application? Can you then forward MIDI events to the outputs via MIOS studio? Who knows? You're right though, it's just 2 resistors for MIDI out. Did you try another ribbon cable?

Is it possible to communicate with the Core via USB? I haven't built one yet but you also should be able to see the MIDI ports from MIOS. Hardware side: check the orientation of polarized components like diodes and ICs. Did you add the optional MIDI activity circuits?

Pics? Bad optocoupler?

There's this: https://www.kickstarter.com/projects/265641170/kraftwerk-highly-innovative-portable-power-plant Which goes to 10W peak if I remember correctly.

Maybe this helps? http://www.ucapps.de/mbhp_aout_lc.html

Hi sneak: the PCBs I designed (TK has some protos) use two Schmitt triggers to buffer an incoming clock. From discussions with TK, the clock input will go to a dedicated pin on the STM32F4; it is connected via the second set of pins on the top row. Hope that helps.

:)

Ah, now I get the 270° curves: smokey inserts for the LEDs! Any reason not to make the whole lot opaque?

Maybe the STM32F4 supports the LCD, but probably not the specific MIOS application. You would have to arrange your own pin mapping and build a custom firmware.

I like the style so far, good job! LT1963 is a good low dropout Vreg (340 mV) at 1.5 A max current. You can get it in 3.3 V fixed version; a variable one supplies voltage to most TTSH VCOs. So if you had a 5 V SPSU at a couple of amps, this could supply the juice for the displays.

From the STM32 core page on ucapps: "Pin mapping suboptimal in some cases. E.g., the outputs of the integrated DAC (not the on-board Audio-DAC) overlay SPI1 pins. However, one DAC channel has been freed up with the small drawback that SPI1 can't be used in slave mode. The IO pins of the SDIO peripheral (high speed SD Card access) conflicts with the on-board Audio DAC, so that it can't be used." Is the SD card continuously scanned? If not, perhaps the audio DAC could be used when the SD card isn't reading or writing. I thought I remembered TK suggesting a SEQ V5 with audio output was under development.

EDIT: I'm just repeating what I said 18 months ago. Sorry for any confusion over custom 16Fs

For a chip solution you could use certain Schmitt trigger ICs that run off 3.3 V but have 5 V tolerant inputs. The 74LVC14A springs to mind, but please check!

Although it doesn't make too much sense with what you describe, you could check the 74HC595 shift register and its resistor array. Pins soldered correctly, right orientation (pin 1 dot etc.) or even a spare chip if you have one.

Just one more option for you and I'll leave you to it: http://www.mouser.com/ProductDetail/Molex/15-91-3100/?qs=sGAEpiMZZMs%252bGHln7q6pm0R%252bIqgWC%252bQxWX5n0pt9Cpo%3d With SMD headers you could have one connector on the top and one on the bottom of the board.

sneak: perhaps a smaller PCB then? I.e. one 2x8LRE plus the OLEDs/CLCD? (P.S. sorry to hijack the Programma thread, just thinking of multiple usecases!)

Hi, for sure the component placement isn't optimal. I'm not really after one myself, I was just playing with the design for a few minutes this evening. The dimensions could be enlarged a little to fit all of the mounting holes required and use the correct clearances. The "4 wall header" can be found in the library "con-3m" to get a better idea of the female socket size. Viel Glück!

Vielleicht so? Maybe I could write this in English so you don't laugh at me too much! The routing might be easier if each "side" of the 165 connected to one 2x5 DIL header. This would use both the top and bottom chip, but of course the header pinning would be less intuitive. Still, if size is an issue, perhaps it's a good sacrifice? The decoupling caps could also be through hole components: you only need to worry about the pads as everything else is very flat (apart from the DIL headers). If this is truly intended for machine assembly only, don't be afraid to go to a smaller component size like 0603 or less. The power ratings should not be an issue.