sub> sequencer

today ill get to test the comaprator circut that will add the xternal clock inout to the sequencer... i ve never made a circut directly from schematics.. so it will be a test for me for sure.. theres one part im not really totally sure about, its a power suply bypass area that has a 3 ceramic caps and an electrolytic that ive subbed with a tantalum (didnt have en electro in that value..) i believe it has something to do wi the grounds. the rest of the circut has no tie at all with anything else.. so i guess im reading it correctly. we'll see. if it works or not. if it does.. that'll be damn sweet since xternal clocking can happen then, from a +5 source (MTM, 909, 808, 707, 440 trigger, drum pads.) .. crossing my fingers on that one

the other circut that i had to make (for the expander unit) is a led driver /buffer circut using a cd4514 chip.. its the chip that drives the gates and leds on the main unit. its basicly not to hard to do.. everythings done right off the pins from the chips. (minus a resistor and power) so hopefully my wiring was good. its driven by the control signals from the digital board that the analog board is driven by.. (QA QB QC QD) whatever they are coming out of the 4067 i believe...it basicly has no logical pattern on the pins to how they are wired, but according the schmatic i dl'ed from MFOS its shouldbe the way to fly for LEDS of for making triggers sequenceable!!! its the key for making a drum programmer sequencer. and having lots of flashing leds..:) i like that. i have dpdt switches coming (small ones) that im planning to use for the trigger sequencer. one side of the dpdt will be the trigger itself and the other will be a "on/off" indication for each step.. so as the main leds accross the top count accross , the ones for each step will turn on when it hits thats step if the on switch is switched on. so we'll see. its the next project after the expander cv module.. i want to do a test unit with maybe one row (plus i have a 1 space enclosure and shit i got from the trash to use up-old altec power amp) . so thats the test for the big drum /trigger guy that im going to try.. like 4 or 6 space rack face... probubly 6. have the enclosure for it as well and plate allready.. from the remains of a revox reel to reel enclosure. the other half is used in the expander mod allready . i heart the jig saw and metal blades... well thats all for now.

all the best and tell everyone inthe factory that number 5 alive.

jonny 5