1. LoFi Future - GrooveBoy XL Testing

    Further testing, making sure the filter and delay work with a super low noise floor and that the anti-lockup mod on the PT2399s is doing its thing.

  2. LoFi Future - GrooveBoy XL Testing

  3. Testing, testing, and some more testing.

    Making sure everything is doing what it should.

  4. LoFi Future - GrooveBoy XL [GBA Powered MIDI Workstation]

  5. LoFi Future - GrooveBoy XL [GBA Powered MIDI Workstation/Groovebox]

    Here it is in an almost fully functional state.

    The arduinoboy needs to be installed and some finishing aesthetic touches need to be made but other than that it is fully functional. I may actually install a fan on this too, the 3.8V regulator gets quite hot when it is running off of a 4A 12V PSU, this may include some more drilling, but i could relocate the regulator to be near a vent to avoid too much extra work.

  6. Hand crafted analog sequencer by LoFi Future

  7. DIY Sequencer

    Almost complete, a few more things to add and the wood still needs finishing.

  8. Building another sequencer based off of the MK107. A popular kit to modify into a primitive analog sequencer. The inspiration to my OctroTron Expander project. 

  9. LoFI Future - OctoTron Expander

    PCB Design for the 8-Step Sequencer is almost done, Im calling this thing the OctoTron Expander. This sequencer is very primitive. As you will notice there are no step on/off switches and no transistor outputs to pull a proper gate from. It has simply one voltage output. The KORG Monotron likes to receive CV via gate for some reason, so sending this one voltage in to the monotron works just fine. You can also send this voltage into the cut off CV and modulate it, there is an on board switch to send the sequence to the pitch or cut off. The steps can be turned of by turning them all counter clockwise. This is possible thanks to a dead spot in the 1n914 diodes, when the pots are turned down, the 1n914 drops out all the voltage and basically breaks the connection, just like a switch.

    On board 9V and 3V regulators lets the sequencer and monotron run off of a 12V wall wart. Sync in is conditioned and wired to connect into the internal 555 clocks trigger input. It can accept basically anything you throw at it, from a TR626 clock to a line level audio signal.

    This board is designed to be mounted via its pot and 2 PCB standoffs from a custom cut panel that will also host the monotorn on 2 PCB standoffs and a supporting bracket.

    What this means for the builder, is an easy assembly that could be accomplished within half a day.

    This will work with all 3 monotron models. With the DUO its really nice since the voltage from the pots is pitched quantized in key.

  10. GrooveBoy XL - Final stages.

    Its been one hell of a build, but this one is very close to completion. Cant wait to jam on it before i send it out to its very patient future owner!