x0x:vcomods

# Differences

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 x0x:vcomods [2007/09/30 18:51]hl-sdk x0x:vcomods [2016/01/28 18:05] (current) Both sides previous revision Previous revision 2010/09/22 17:36 antto something i can say here..2007/12/03 16:36 external edit2007/09/30 21:28 hl-sdk 2007/09/30 18:51 hl-sdk 2007/09/30 18:00 hl-sdk 2007/04/04 06:08 hl-sdk Next revision Previous revision 2010/09/22 17:36 antto something i can say here..2007/12/03 16:36 external edit2007/09/30 21:28 hl-sdk 2007/09/30 18:51 hl-sdk 2007/09/30 18:00 hl-sdk 2007/04/04 06:08 hl-sdk Line 18: Line 18: Put capacitors in parallel with C35 to make slide time longer, place them in series to make it shorter. I'd suggest values from .1 to 10uF Put capacitors in parallel with C35 to make slide time longer, place them in series to make it shorter. I'd suggest values from .1 to 10uF + + Note2: normaly the frequency of the slide time Filter (C35 and unknown resistor(s)) is 7.2 to 7.5Hz (this is based on actual measurements of the output, not the schematic or circuit) thus with the 0.22uF cap the resistance is 100K (wherever it is) + for a ~twice slower slide use a ~0.44uF cap ==== CV In ===== ==== CV In ===== Line 53: Line 56: I dont know if "To CV" is as easy as hooking up the circuit to Pin 5 of IC 11. We need to sum the voltages basically. I don't know if this is the proper way to do it. I dont know if "To CV" is as easy as hooking up the circuit to Pin 5 of IC 11. We need to sum the voltages basically. I don't know if this is the proper way to do it. + ==== Sub Oscillator ==== ==== Sub Oscillator ==== Line 67: Line 71: === Questions to answer before performing this mod === === Questions to answer before performing this mod === - Because the Oscillator outputs between 5 and 12v the voltage needs to be biased (like the Self Frequency Mod above) so that it is 0V and 5V respectively, and perhaps ​re-biased ​back. + Because the Oscillator outputs between 5 and 12v the voltage needs to be biased (like the Self Frequency Mod above) so that it is 0V and 5V respectively. It does not need to be re-biased ​because the filter is AC coupled, and then biased, allowing you to feed AC coupled signals into the VCF. One way to easily do this is just divide the signal by by voltage divider by a ratio of 4, giving a signal between 1.25v and 3v. That is very iffy, and it would be better to divide by 2 and run the CD4024 off of 12v, making LOW be 3v and HIGH be 11V. One way to easily do this is just divide the signal by by voltage divider by a ratio of 4, giving a signal between 1.25v and 3v. That is very iffy, and it would be better to divide by 2 and run the CD4024 off of 12v, making LOW be 3v and HIGH be 11V.