Constructional difficulty: Easy
These three modules are simple but very effective control modules. Each Control module is based around the same circuit board, the Four-pot PCB. This is then simply built up in one of the three ways to match your chosen panel option.
The Control-1 module in a standard 1U wide Oakley panel. This module features four independent voltage sources.
The Control-1 generates four very stable voltages. The output can be varied from -5V to +5V for each of the four outputs. Each output is completely separate and can control many modules without loosing accuracy. When the control knob is central, ie. pointing directly upwards, the output voltage is zero volts. You can use these voltages to control other modules within a modular synthesiser. For example, you can add offsets to CV inputs to increase the range of existing modules. This way you can drive your Oakley VCO to very low frequencies and use it as an LFO. Or you can deliberately cause audio inputs to go into asymmetrical distortion by forcing the input amplifiers into overdrive.
The Control-2 1U wide module. This features two voltage sources and one reversible attenuator.
The Control-2 generates two stable voltages in a similar fashion to the Control-1. However, this module also features a highly stable reversible attenuator too. In this section the control knob can be set so that the gain of the attenuators input is anything from -1 to +1. This means that the input signal, CV or audio, can be inverted and attenuated at the same time. You can make -4V into +4V and vice versa, or turn positive envelope outputs to negatively going ones.
The Control-3 2U wide module. This features four switchable voltage sources that can be used as reversible attenuators as well.
The Control-3 module is the big one. This uses a 2U wide panel to acheive multiple functions. You can use it as four separate voltage sources. Each section has a dedicated switch that can turn the output off and produce an accurate zero volts. Each section can be used as a reversible attenuator when the input jack socket has a jack plug inserted.
Remember that all three modules are made from the same 'Four pot' PCB. You simply build it up as your option dictates. On the board there are four identical reversible attenuators and one precision 5V reference.
Please note: the PCB has no additional mounting holes and is fitted to the front panel by Oakley pot brackets only.
Prices
Control-3 ready made module............................ 135GBP
Four pot PCB
........................................................ 19GBP
Pot Kit Control-1 and Control-3
............................12GBP
Pot Bracket Kit for Control-1 and Control-3
........ 4GBP
Pot Kit for Control-2
............................................... 9GBP
Pot bracket kit for Control-2
.................................. 3GBP
Pot Kit contains the correct type and quantity of Spectrol 248 or BI TT potentiometers to complete one module.
Pot Bracket Kit contains the correct type and quantity of Oakley-Spectrol pot brackets and extra Spectrol nuts required to complete 1 module.
Click here for full price list and ordering details. All prices include VAT at UK rates. Shipping and postage is additional to these prices.
Project Downloads
Use 'save as...' button to download and view the files. IE users need to right hand mouse click and then choose 'save as'.
Schematics are now available as a 'pay per download' service. Any modular schematic can be purchased for 2UKP each. The purchaser agrees that the schematic must be used for personal use only and not to be sold on or allowed to be re-transmitted in any way. These diagrams are copyrighted and any infringements will affect the future use of this service to others. PCB layouts will not be made available as yet.
Front Panel database
A Schaeffer front panel can be made for a 1U wide Control-1 and Control-2 modules, and the 2U wide Control-3 module. The databases can be found here: control1.fpd, control2.fpd and control3.fpd. To read these files you will need a copy of 'Frontplatten designer' from Schaeffer. The program also features on-line ordering, so its now even easier to buy your panels from Scheaffer.
The company are based in Berlin in Germany and will send out panels to anywhere in the world. Delivery to the UK normally takes around ten days. For North American users you can also order your Schaeffer panels from Front Panel Express.
Parts lists for US builders
Builders based in North America can now find full parts lists, complete with order codes, for many of the Oakley modules. Larry Hendry has kindly provided the web space for customers to upload parts lists. Go to www.wiseguysynth.com for full details.
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