hi folks,
This is OT from CGS, although related being that the modules are
used :-) I have a basic fundamental question which will reflect my
less than ideal foundation in electroinc design.
I have a pro one synth (first synth bought, still going after 25
years) and I like to modulate the vcf from other voltage sources. The
vcf cv input looks like it wants 0-15v, based on the schematic.
Most of the voltages I have for sweeps and random modulations are 0 to
5v. My question is will a simple opamp with a 100k input resistor and
a 330k feedback resistor provide the nessary voltage gain to drive the
vcf to its full range? I found several voltagr processing DIY circuits
on the web, but none seem to amplife the voltage, only add an off set
amount or mix voltages. Could I add a pot in an output buffer of one
of thess designs to get overall voltage gain?
thanks for any suggestions.
Jeff
This is OT from CGS, although related being that the modules are
used :-) I have a basic fundamental question which will reflect my
less than ideal foundation in electroinc design.
I have a pro one synth (first synth bought, still going after 25
years) and I like to modulate the vcf from other voltage sources. The
vcf cv input looks like it wants 0-15v, based on the schematic.
Most of the voltages I have for sweeps and random modulations are 0 to
5v. My question is will a simple opamp with a 100k input resistor and
a 330k feedback resistor provide the nessary voltage gain to drive the
vcf to its full range? I found several voltagr processing DIY circuits
on the web, but none seem to amplife the voltage, only add an off set
amount or mix voltages. Could I add a pot in an output buffer of one
of thess designs to get overall voltage gain?
thanks for any suggestions.
Jeff