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x0x:vcomods [2007/09/30 18:51] hl-sdk |
x0x:vcomods [2007/12/03 16:36] 127.0.0.1 external edit |
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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. | ||
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==== Sub Oscillator ==== | ==== Sub Oscillator ==== | ||
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=== 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. |