Projects

This is a clock multiplier made for musical purpose, such as synthesizer/modular-systems or other things that would send out or receive 5v pulses. The current code is written for a ATTiny85, but should work fine on any Arduino etc. The program measures the time between each pulse input, and outputs a repeating pulse with an interval defined by the variable ‘mult’. There are 3 more inputs/outputs avalible if using and ATTiny85 these are currently used for changing mult, but could be replaced by an potentiometer for a wider range of tempos. I have uploaded the code for the microcontroller to Github: HERE ...

This is a sequencer made for controlling modular systems. It has 8 knobs controlling the time/length of each step and 8 knobs controlling the CV output for each step, generating interesting rhythmic patterns. The sequencer has a random mode, start/stop, two time-multipliers and a slide switch. The sequencer is based on a teensy 2.0 source code can be found here ...

This is a modular synthesizer build with focus on noise music or non-musical purpose. Using different effects, filters distortion etc. weird noise can be generated through feedback loops or external input. Overview The unit contains the following modules: 3 delay modules 3 distortion/wavefolds 2 tone controls 1 dual equalizer 1 3×3 matrix mixer 1 oscilator/LFO 1 VCO module 1 external instrument input 1 digital noise module 2 resonance filters 2 mults 2 mixes 1 mixer for output ...

This is a drone machine consisting of four identical oscillators. Each oscillator can be tuned by two potentiometer; course and fine. A patch-bay on the instrument are used to cross modulate the different oscillators, through frequency divisions. The machine also have a tone-control and volume control for controlling the output. ...

Video Synthesizer This is a video synthsizer cable of synthesizing a VGA signal. The instrument/tool is based on a VGA-test module, with its VGA-output broken into multiple signals. The signals can be patched through different other modules such as a clock divider etc. The insturment can be used for VJ’ing og just pure fun. The Testing module breaks out into each color-channel, horizontal and vertical -video sync. The picture coming from the tester can be changed using a gate signal trough an external mini jack. View this post on Instagram A post shared by @simonjuhl_ ...

This is a polyphonic synthesizer made schmitt-trigger oscillators. Signals from each Individual oscillator is transfered through finger/flesh and into the mix. This also make it super noisy. The circuit for this projects is very simple. 12 schmitt-trigger oscillators are all connected to different copper-pads, which line up with copper-pads going to the output-mix. When both copper-pads are touched by skin or other conductive material, the singal goes though to the mix and the sound can be heard. Since the mixer has a lot of unconnected parts when not touching anything a lot of noise i coming out of the amp (i used a LM386, maybe a less noisy application?). I tried putting a capacitor on the mixed signals, this seems to be making the signal sort of weak but more soft and less noisy.

This is a homemade synth/drone is based on 4 tiny electric motors, each with 0-5v CV. An internal piezo amplifies the vibrations from the motors so the sound can be plugged into a mixer etc. Schematics Here are some more build pictures on instagram: Link Each motor is driven by an NPN-transistor in this case: 2N2222. An opamp is controlling the voltage aplied to the motor. I used a TL074 op-amp for my project, but any op-amp should do. potentiometers can be put between CV or 5v to attenuate the speed of the motors. For the amplifiing the piezo i used a LM386. I am not an expert in electronics so these scehamtics can problerbly be improved