A completed MU Dizzy module with integral 5V
regulator. The regulator IC has been mounted onto the metal panel
to allow currents up to 250mA to be taken from the +5V rail.
This is a MU power distribution board
supporting twelve 5-way 0.1″ MTA/Molex headers and up to
five 1/4″ (6.35mm) Faston blade terminals for power entry.
An optional +5V regulator can be built on the board to create a
stable +5V 250mA supply from the +15V supply if the main power
supply has no +5V available.
Also included in the design are eight 0.1″
headers that can be fitted to connect to the Oakley Bus. The
Oakley Bus can carry Key CV and gate signals to suitably equipped
modules, like the Oakley VCO, VRG, ADSR, etc.
The double sided circuit board is 5.6″
(142mm) long by 2.35″ (60mm) wide. It is designed to go at
the rear of 19″ rack units or built into the bottom panel of
wooden modular cases. Each row of three headers is ‘star wired’
back to the blade terminals to ensure to lowest possible
resistance and unwanted interaction between connected modules.
It is fully compatible with MU and Oakley/MU
power busses.
The Oakley/MU power system is identical to
MU power systems except that the normally unused pin 5 position
on the MU power header is now connected to 0V allowing both the
traditional four way interconnect or a five way interconnect to
be used between the module and the distribution board. In all
newer Oakley MU modules the module’s pin 5 is connected to the
front panel and socket sleeve connections which, when used with
the MU-Dizzy and five way interconnects, can help in alleviating
unwanted inter-module crosstalk.
1/4″ (6.35mm) Faston blade terminals
provide for easy and reliable connections to the master power
supply.
Project Downloads
MU Dizzy issue 2 Builder’s Guide
Construction
Guide Our handy guide to building
Oakley DIY projects
Parts
Guide Our handy guide to buying
parts for Oakley DIY projects
In this build the optional 78M05 regulator
is not mounted to the panel and sits above the board’s surface.
The maximum current that can be drawn from the +5V rail with the
regulator mounted in this way is 100mA.
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