Build notes for the Elmyra

The Elmyra is a very easy DIY project.

This is a complete synthesizer from Neutral Labs 

 

It's great for drones, and doubles as an effects processor. 

 

Ed from Elk Elektroniks hosted a DIY workshop centered around building one.

 

You can also order these online

 

The Elmyra was inspired by the Soma Lyra-8. 

+ Lyra 8 build - part 1 

 

 

 

Unlike the Lyra, the Elmyra has a filter and can be set so that the three oscillators are always tuned to a scale

 

I have a mark 1 version, which is very similar to the latest version.

 

The kit includes all parts and a printed build guide

 

 

 

 

 

 

The Mark 2 has a audio input allowing for external audio processing.

 

There is just one PCB. All parts are well spaced , making for a simple build.

I

place the 4 LED sockets in first.

Next the touch pads. 

Don't forget to add the plastic washers underneath.

 

 

 

 

 

Solder the 4 pin SMD header.

The Mark2 version has the header flat.

Now work on the PCB's bottom side

Install resistors, diodes, etc.

Remember that diodes are polarized.

 

Solder the 8 pin IC socket

Next solder the capacitors, and then the headers for your arduino.

The tall electro capacitors are polarized

The arduino headers are the trickiest part of the build I think.

Once the female headers are soldered to the PCB insert the male header into the arduino (small end)

Plug this carefully into the female header.

Make sure all is seated well.

Now solder

 

The arduino is already programmed.

 

PCB Top Side

 

This is mainly a matter of soldering the pots, switches & LEDs.

Remember that the LEDs are polarized.

I like to start with the POTs. 

Fit the into the PCB, then attach the faceplate.

Screw the pots to the faceplate, making sure all looks and sits well.

Now solder  the pots.

Repeat for the switches & LEDs

PCB Bottom Side

You are almost there

These are the power connection (right) and the audio output jacks.

As my kit is a mark 1, it doesnt have a audio input.

But this is a easy fix.

yOU  now need to connect the power and audio jacks to the PCB.

Follow the guide in the manual.

Remember to ground everything.

My Version 1 PCB needs a small mod to alow it to process external audio.

Just solder one 10K resistor to R16.

I soldered the 10K resistor ro the jack socket instead.

Works the same

iT'S done. :-)