259X

The MIDI Universal Converter (MUC) in Buchla format is a DIY adaptation of the project from EDV-Technik. It’s a powerful and very stable Midi to CV converter offering 24 outputs : Technical Specifications :

• 16 control voltage outputs with a range of 0-10V : Outputs 1 – 8 1.2V/octave, or trig Outputs 9 – 16 1V/octave
• And 8 Digital Output with 0-10 range : Ouputs 17 – 24

Functions available : Split Key mode Polyphonic Mode (up to 8 channels + Velocity) Glide function for each CV output Autoglide support for V/Oct ADSR Envelope on each CV output 4 memory slot to save your setups and more. Manual Eng Manual Ger We’re offering the panel and the adaptation PCB to solder the panel parts, and the wiring. You’ll also need the main kit that you have to order from EDV-Technik containing the main pcb already soldered, the screen and all the wiring. To order the main pcb : edv-technik-ts@gmx.de     258D Dual Oscillator PCB is a two layer, ENIG plated board designed to replicate the functionality of the Buchla 258C module using modern construction techniques and readily available parts. It can be used with any 258 panel, but we recommend the panels available here which have the correct cut out for the calibrated V/O inputs – third party panels will need this hole drilling out by the builder. Like Mark Verbos’ 258V and Dustin Stroh’s 258J, the 258D uses the exponential converter and triangle core from the Electronotes VCO option 3, designed by Bernie Hutchins, with output waveshaping derived from Don Buchla’s original 258 Design. Additionally, the 258D includes: • A stable voltage reference to isolate the frequency controls from fluctuations and noise on the power supply rails • High frequency compensation for improved tracking • A scaled V/O CV input in place of the original scaling potentiometer • The option to select either saw or square waveshapes for each oscillator by setting a jumper on the rear of the module • A buffered copy of the triangle core replacing the rightmost output of each oscillator The 258D is designed to be suitable for hand assembly, but it is not recommended as a “learn surface mount” starting point. You should at a minimum have a temperature controlled soldering iron with a reasonably fine point and good quality solder 0.5mm diameter or finer. Some form of magnification may be beneficial for placing and inspecting the SOT-363 packages.   Bill of Materials can be found here – 259X BOM V2_09032021 Further support can be found here – https://modwiggler.com/forum/viewtopic.php?f=17&t=244920 Boards can be purchased here, and front panels can be purchased here. Front side of PCB – Rear side of PCB – Example of populated board – Example of completed unit – Notes –

• PCBs are supplied bare (other components must be sourced)
• No warrenty is given nor implied