Published on Feb 10, 2015
"Replicating the Replicator"
It looks like we have a new modular DIY maker. Really Nice Audio or RNA for short currently has three modules listed on their site, the replicator x8 CV Buffer (video above), the dualHMVCO1a VCO, and CV Mixers based on an adaptation of Ray Wilson's MFOS design. Details on each captured for the archives below. They also do DIY synth mods and repair including work on the Yamaha DX-7, Korg Poly-61, Korg Monotribe, Oberheim DMX, and OSCar.
the replicator
"This versatile CV Buffer features 8 buffered outputs as well as 2 buffered inverted outputs.
The toggle switch inverts the voltage to the bottom 4 outputs.
2 bi-polar LEDs show the voltage polarity for each bank of 4 outputs.
It can also be used as a 2 x 4 channel buffer as inserting a signal into the IN2 socket overrides the bottom 4 outputs.
Comes with eurorack ribbon power cable and 2x 3mm screws."
dualHMVCO1a
"With 2 boards I claim 4 oscillators!!"
CV Mixers
"This CV Mixer system is an adaptation of Ray Wilson’s design found in his Multi-Function module from the essential MFOS website. I wanted to make a modular design with minimal wiring. All pots are soldered to the PCB whilst the sockets connect to a 5 pin single row IDC. This way you can use ‘each side’ of a 10 pin IDC to connect 2 mixers at a time to your socket panel. I made a socket panel which has 2 x 10 pin IDC connectors so 4 mixers can be connected. Built into my socket panel is a Common Input which buffers this signal each of the 4 CV 1 inputs. Inserting a plug into a CV1 input socket breaks the buffered signal.
This system I built for my 4x HMVCO1a so I have wired each mixer output to its corresponding oscillator via the ‘normalled’ pin each CV input socket.Each CV Mixer gives you :
A coarse voltage bias
A fine voltage bias
3x CV inputs with attenuators
A bi-polar LED indicator showing polarity of voltage"
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