Small-gauge film optical printer platform
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Matt McWilliams 17d4ff459f Notes about 4pin_connectors 2 months ago
app Update the notarization process for installing mcopy 3 months ago
data Add option to use Processing with a server as a capture method triggered by the camera. 3 months ago
docs Upload screenshots of app 4 years ago
hardware Move all scad files into scad dir 3 years ago
ino intval2 connector firmware 1 year ago
notes Notes about 4pin_connectors 2 months ago
processing Add option to use Processing with a server as a capture method triggered by the camera. 3 months ago
scad Add a lamp housing knob 1 year ago
scripts Remove the cli project. It was unmaintained and unnecessarily adds to the project complexity. 1 year ago
src Add option to use Processing with a server as a capture method triggered by the camera. 3 months ago
stl Update the projector knob design 3 months ago
.gitignore Begin testing with mocha and chai. 3 years ago
LICENSE Update license as work has been ongoing since 2018 1 year ago Update links to latest release 1 year ago
package-lock.json Update global package.lock 3 months ago
package.json Add option to use Processing with a server as a capture method triggered by the camera. 3 months ago
tsconfig.json Update typescript config to work on macOS. Basically just add a bunch of dirs to the exclude array. 3 years ago


An open platform for controlling small-gauge film optical printers (16mm, Super8, 8mm).

  1. Introduction
  3. Usage
  4. Software
  5. Firmware
  6. Hardware
  7. Why?


The mcopy project is comprised of software and hardware for optical printers, built with re-purposed broken projectors.


  • Sequencer desktop app
  • Scripting language, called mscript, for orchestrating complex sequences
  • Arduino firmware for projectors, cameras, lights and existing printers
  • 3D models of parts used for modifying projectors and printers
  • Schematics for simple Arduino-based electronics
  • Filmout feature for digitally transferring video and images to analog film
  • Interoperability with the intval3 intervalometer


Latest Installers

  • 1.6.9 for macOS, Linux (.deb) and Windows (.msi)

Older Versions

  • 1.6.7 for macOS and Linux (.deb)
  • 1.6.4 for macOS, Linux (.deb) and Windows (.msi)
  • 1.6.2 for macOS
  • 1.6.1 for macOS
  • 1.5.2 for macOS
  • 1.4.9 for macOS and Linux (.deb)
  • 1.2.0 for macOS and Linux (.deb)
  • 1.0.3 for macOS and Linux (.deb)

For Windows, you can install from source for now.


The software requires your hardware to be in place before the mcopy control app is useful.

mcopy app


The mcopy desktop app is an Electron-based project which can be built for Linux, Windows and macOS. Pre-built packages will be made available for macOS, initially, with the other two target platforms to follow. To build the desktop app from source, see the installation and running instructions. The desktop software also interoperates with two related projects; the Bluetooth + Wifi capable, Raspberry Pi-based INTVAL3 and the Arduino-based intval2.


This project contains Arduino formware for controlling:

  • a projector
  • a camera (see intval2 for more info)
  • a light
  • a projector + a camera
  • a projector + a light
  • a camera + a light
  • a camera + a projector + a light

Using a simple serial interface, this modular platform can be used to control DIY components, modified existing optical printers or a mixture of components. The desktop app can connect to multiple serial devices, so your mcopy optical printer can be built from various designs that suit your hardware tastes/needs/available parts.


All non-electronic hardware for this project is available as plaintext OpenSCAD files and 3D print-able .STL files. The hardware component of this project is aimed at modifying broken Bell & Howell projectors into USB serial-controlled projectors to be used in optical printing.

As a secondary capability, this desktop software and firmware package can be used to replace the sequencers for early-model JK optical printers, with some modification.


I'm interested in expanding the viability and access of the 16mm film format and to repurpose thre rising tide of discarded film technology.