Am Tue, 17 Apr 2012 13:55:53 +0200 schrieb Sebastian Moors <[email protected]>:
> Krzysztof Foltman wrote: > > On 14/04/12 16:15, Sebastian Moors wrote: > > > > I love the idea. Might want to build one myself, if I wasn't so awful > > with soldering iron and even worse with things like PCB etching. i currently designed a 2 layer pcb layout. my local dealer can produce me 4 boards for ~15€. so it is will possible to chip a pcb boards for ~5€ inclusive chipping as a letter. of curse you have to drill the holes self. with holes it will cost much more. > Same goes for me. Mostly i hurt myself when i try to solder something :) > But the layout looked not that hard and it was build on a breadboard, so > there is no need to etch (at least not if you don't want a > production-ready product). that's right. beside the teensy2 board and the lcd all elemnts i use, are simple passive parts. a list: 1x toggle switch on/off 1x toggle switch on/off/on 8x trimmer 100k or 220k 1x trimmer 10k 8x zenerdiode 5v1 8x 20mm piezo buzzer 8x cinch jacks(or what you like) 3x poti 10k or 22k a small bread board some screws, glue and wire for a pcb variant you need optional 1x 8x2 connector 1x 8x connector 2x 3x connector 1x 2x connector active parts: 1x teensy2 1x 8x2 LCD but as i say circuit part list and pcb layout will follow soon ;) > > > > I still think the most difficult and expensive part is the > > "mechanical" parts like case/enclosure, the material for pads and > > things like that. Any ideas for solving that using cheap off-the-shelf > > parts? I guess that's going to be different between countries, or at > > least between continents. > Hm, here in germany you can order cases for around 10€ from electronic > suppliers. Wolke said something about his supplier, but i forgot the > name. Maybe he can clarify things.. http://www.tube-town.net/ttstore/product_info.php/language/en/info/p5000_Hammond-Druckguss-1590STPC.html this is a standard hammond aluminum case from the hammond 1590 series. it cost 9,10€ here. but hey, imo the case can be also a cheap luchbox or what you like. the button pad used 8 cheap 18 cents piezo's, some rubber and a peace of wood or paxolin. but the button pad is not easy to build and the rev.2 need a 22mm drill. this is not available for everybody. also you need an oscilloscope to find out if a hit on the piezo produce a neative or a positive amplitude first. i noticed that some piezo's start with an negative value and some other piezo's with a positive value. so it is important to check each piezo to wire each correct. > > > > Another possible direction, maybe less h2-oriented, would be to couple > > the drumbody with some drum sampler program running on a raspberry pi > > or something similar. Might be a modified h2, but optimizing the > > Hydrogen engine for low-power slow-FPU arch like ARM11 might be more > > difficult than writing a simple integer-based thingy from scratch. > > Still, the end result would be a self-contained open-source instrument. > Yes, the raspberry pie looks promising. I'm going to try to port > hydrogen to it (and, sigh, QT5) if alsa becomes available on it. > - Sebastian > > > ------------------------------------------------------------------------------ > Better than sec? Nothing is better than sec when it comes to > monitoring Big Data applications. Try Boundary one-second > resolution app monitoring today. Free. > http://p.sf.net/sfu/Boundary-dev2dev > _______________________________________________ > Hydrogen-devel mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/hydrogen-devel wolke ------------------------------------------------------------------------------ Better than sec? Nothing is better than sec when it comes to monitoring Big Data applications. Try Boundary one-second resolution app monitoring today. Free. http://p.sf.net/sfu/Boundary-dev2dev _______________________________________________ Hydrogen-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/hydrogen-devel
