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Hello all, First of all I want to thank this great site, I could not have done it without the information found here :smile: I build couple of individual 808-voice boards couple years ago, starting with kick, then snare, and low tom drum. When I first saw a MB808 video on youtube, I knew I have to have one. This summer I thought why not build all the 808 sounds and wrap those in one case. Now I've build mid and hi toms, clave/rim, cowbell, hihats, maracas and clap. I'm still missing cymbal, but other than that, the clone works. I used Eric Archers circuits on Kick, Snare and Hihats, and love how those sound. To make toms and other sounds, I transfered original schematics to veroboard design. First tom circuit took couple hours to solder, but three days to troubleshoot :D Luckily, when I got it working, mid and hi toms are basicly the same circuit, just using different values on some capacitors and resistors. Cowbell and rimshot/clave circuits were easy, but clap circuit sure gave me the hardest time. After finishing all the sound circuits I needed a trusty sequencer, so that I have a standalone unit. After gathering some courage, I ordered midibox core, din and dout kits from SmashTV and started building the sequencer. Sequencers main UI pbc with all the buttons and leds are also build on veroboard. I have to say, figuring out connections and connecting all the buttons and leds to Midibox DIN and DOUTS was lot of work, but it was all worth it because MB808 sequencer firmware is simple amazing. I didn't want to reinvent the wheel, so when it came time to do a front panel, I drew a panel using Moogah panel as a template, so I want to thank him also. Here are couple photos from the build and video so you can here sounds and see the sequencer in action. Its still work in progress, but since taking the pics, I've build individual outs and main LEVEL amp section, so basicly its done apart the cymbal. It has ugly insides but beautiful soul

Here's some video action from my MB808. Adaptation from Plastikmans Spastik : edit : I'm still in search of those colourful rainbow switches for the sequencer. So if someone knows a place where to get those, without need to purchase a bulk load, I would be forever greatful.

This is based on Ilmenator's 16x4 BLM PCB that he was kind enough to let me liberate from him and a matte Ponoko laser cut case. I used the same LEDs I used for my SEQ and they match perfectly brightness wise. I interfaced it to the CS via a mini din8 connector which needed to be buffered to work properly (thanks to TK). I'll post the files for the case and the brd and schem of the buffer I used (I obviously just did it by hand here). Thanks to Ulrich and Throsten for another great project! These are the files for the case, please note that there is NO HOLE for the connection, the location and size of that will depend on how you want to implement this so its up to you. Standoffs were 8mm for the top, 18mm for the bottom. I ended up grinding the 18mm ones for a tighter fit so 16mm plus washers may be a better choice to make up for tolerances http://misw.us/p2_blm_case.svg Here are the sch and brd for the buffer. I designed it to simply attach to the board via female DIL on the back like I have it on my PCB. I have NOT actually made these yet so you probably want to check it for any errors but it is simply based on the connections shown the LPC17 schematic and is how I wired my hand made board. Also worth mentioning is the DIN8 socket and DIN cable I used despite having the same colored wires, did not have those wires connected to the same pins so make sure you check with a meter..

He tank you for your answer i have a 808 like you but with the microlarge PCB My sequencer don't trim nothing but i have no connection for the input accent perhaps this is the reason that don't work ?