sequencer sub 5

ok.. well i tried got the comparator circut going!!!! after it now working and me checking and re checking and rechecking my wiring. well im an idiot really, since i had no idea that ics are numbered from the upper left down THEN ACCROSS THE BOTTOM OF THE CHIP to the right side and up. duh. that was the problem.. the add on "trigger comparator" worked flawlessly. so the next day i proceeded to contunie work on the xpander unit...

got it all done and tested it. FAIL> (to quote mr kirk digeorgio) it wasnt traking the steps correctly and doubling up on certain one and was just a damn mess... so i decided to try shortening the connection cable to itsabsolute smallest.. bu when i did theis i mistakenly ahd the +12 an -12 reversed. ooops. yep. big mess now.

so i immediately disconnected the xpandr unit from the main unit.. and then main unit was a mess now. GGGGGRRRRRRRRRR.

so i proceeded to begin changing all chips on the digital board( had a lot of extras of almost all of them...) but i didnt have any extra of the cd 40193 counter ics that basicly make the digital clock signals.. (which would mess everything up if its toasted) .. so i replaeced all but aht and still no luck.. so i mad an order to mouser for a bunch of them. hopefully that will cure the problem. so i can atleast be back at zero with a fucntioning main unit that syncs to the simmons MTM trigger pulse.

that leaves the dilema of the expander unit.. i can either try and buffer the digital control signals from the main units board of i can just add a digital board and control/transport/step length etc to the expander and bascily make another full unit.

thats wht ive opted for. number 2.

so im adding a rown of on/off triggers to it, independent clocking/ step length and modes. so if the main units runnig at say.. a 16 step pattern and in bi directional mode, and the mod sequence if runnign in a 12 step pattern in a reset after last step mode.. man.. hte crazy shit that will come out of that.. of if i want to i can use it drive 3 seperate cv ins on the oberheim xpander i have to make a chord.. in a roundabout way..


so thats where im at. im excited that this may actually come to fruition soon. and actually work!

as ray wilso n from MFOS said.. i flew to close to the sun there for a minute.