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TekkStar formerly "Tama Techstar 306" https://vimeo.com/113875738 once in the 80ś this was a brainless Drumexpander for Electronic Drum Kits... 30years later it gets a brain, no sequencing @ all, but note processing, and with note processing you can do a lot by doing less... wile a korg electribe rythm is sequencing, you can takt that and Kill, invert, roll, reroute, Offsets the notes and make trigger out of it... this drumexpander is velocity sensitive that meens, i could use a AOUT Board for this.... BUT i think that is a little bit overkill --- i decidet to take a DINX4, change the Resistors and make a 4Stage Veloctiy Trigger. I know that is enough because, i have already programmed a groovebox in max msp, that uses 3 Velocitys (3 Colours in the button matrix) - so 4 of it- enough... A AOUT board is still a plan - but not for trigger, - more for a VCA and VCF @ the Master > from my livesetup with other drumachines, i saw that it is very "doing less sounding much" if you can change the Release time of the Master --- by trigger a VCA (the trigger is selectable)... and VCF -without words! As you see this Case holds: 4 Analog Tom - Board 1 Analog Synth -Board 1 Analog Clap -Board -a Mixboard, which i dont use anymore, i need place for 2xDoutX4 and a DinX4! From Behind, already installed: The Core, and a modified DOUTX4 Board, A Core-Powerswitch (to reboot), and a PowerConnect where before was a Cable. Finding the best Resistor Values for the DoutX4 Board, by using 5K Trimpots As you see I used 4 Off it, so one Trigger has 4 Velocity-Stages. After finding the correct Values, and then testing fixed resistors in the near of the Pot Values (by ear), its time to solder a bit... well 2h 40min Later found a place for it, and wired the trigger outputs to the Drumvoices The 7th Board - the "Mix Board" a useless device that do not very much, ok, it makes headphone output a symmetric audio and so on, but how cares, I NEED PLACE for the UI and for the Midibox Boards (DOUTX4 DINX4 and so on), but bevore I had to solder a Adapter, because the Connecter pins are swapping on this board before it goes to the powersupply The Powersupply, supply me with +6VDC, and the coolest: -15 +15VDC!!!! yes I have planes... but The CORE wants 5V, so find a place for a 7805 found it! http://midibox.org/forums/gallery/image/2597-tekkstar_make_021_ps_drill-holesjpg/ http://midibox.org/forums/gallery/image/2598-tekkstar_make_022_ps_solderingjpg/ http://midibox.org/forums/gallery/image/2600-tekkstar_make_024_ps_donejpg/ The core fits well behind the Trafo, but the Powercord sucks! http://midibox.org/forums/gallery/image/2605-tekkstar_make_029_core-mountingjpg/ Away with that ugly grey chord - a real Power Connector a "Kaltgerätebuchse" - hell yeah! http://midibox.org/forums/gallery/image/2601-tekkstar_make_025_ps_ad-power-connectorjpg/ But hey Core should be shieldet against the trafo, i searched my metal cases, and i found a very soft flexible Metall which is great for such ferromagnetic shielding stuff... http://midibox.org/forums/gallery/image/2603-tekkstar_make_027_ps_core-shieldjpg/ Programming and testing Functions on Prototype Connector Boards "PressFitPCB" http://midibox.org/forums/gallery/image/2610-tekkstar_make_034_ui-program-btn-ledsjpg/ Because the TOM4 Board was Broken "Haarriss" the PCB-was broken, i had to solder something by the way i made my own first mods for this (by looking @ the shematic, which is very good to understand)