I built a Oakley Sequencer but its behaving kind of strange,
Tony mentions he does not provide direct support on diy builds, so ill post here hoping someone that has built the sequencer can help me figure this one out.
If i follow the initialise instructions per the manual after the build: (previous tests about correct voltages have been carried out successfully)
*All individual step load switches to 'Load Off', except step 1 which should be set to 'Load On'
And i do all the other steps:
All the step mode switches should be set to the middle 'normal' position, except step 9 which should be in the 'reset' position. All the gate select switches should be in their central position. The two scale switches should both be set to X4. The 'Load on Shift' switch should be off, ie. in the up position. The 'Gate Width' switch should be in the 'Full' position. The pot positions are not important at this stage.
Then i turn the module on.
This is what happens:
If i press shift, steps dont light or advance.
But if i put the load switch for all the stages in the middle (leave as marked in the panel) and stage one load on:
I press load, then shift does make the steps advance.
Gate Reset works on both channels.
Gate out works on both channels at a voltage of +5v if gate is and +12v if the switch is off?
This happens in both gate out A and gate out B.
Cv out 1A outputs corrdt values with correspondents stage pot on fully clock wise and outputs +1v/+2v/4v dpeneding on the scale of row 1. (i guess this means row one is kind of calibrated)
Cv Out a2 goes from +12 volts with potentiometer next to CV out A2 al the way ccw and +15v if the pot is all the way clock wise.
Cv Out a2 goes from -17 volts with potentiometer next to CV out B2 al the way ccw and -14v if the pot is all the way clock wise.
Im making all the measurements with my good old Fluke 8842A, so they are readings to be trusted and have calibrated many modules with it over the years,
Hope with this information you might be able to give me some hints as to where to look at.
One last thing, the CD4049UBD hex inverter U1, U2, U4 where the wrong size, my mistake.
I bent the legs inwards of the ic under the scope and matched the size of the pcb footprint.
I soldered the pads. applied flux and used my hot gun on the ics as if they where QFN´s.
Connections are fine under the scope and the continuity is correct on of the pads (little bit meshy but had to improvise a bit)
I did not go over the temperature specs of the ic with the gun so i doubt i fried the ics.
Al the soldering was done on top of an antistatic matt, so i dont think there has been any trouble with ESD.
Thanks a bunch
