Our Digital Super 8 Cartridge proto-type has evolved. It's now synchronizing quite perfectly to the Super 8 camera shutter, using the the movement of the claw in the camera. It contains the Ximea MU9PC-BRD camera, it's a 3D printed housing and it also holds our own developed shutter sync electronics. The device connects through mini-USB with a Single Board Computer based module and touch screen that runs all software to control the unit. Currently running on an Intel based SBC (Minnowboard Max) but first port to using a more common (and cheaper) Raspberry Pi 2 have been successful.
The unit will delivery 18fps and even 24fps (if your camera supports it) at VGA. First improvements delivered 18fps at quarter-HD (960x540). Timelapses at full HD and single frame shots at full sensor (5 Megapixel) also supported. Software is designed to store up to 3 minutes of full RAW images that can be turned into MPEG video or uncompressed video. Dissolves between shots supported in the software. Some image color grading and B&W also supported.
Currently working on a proper user interface for the software. And the SBC and touchscreen unit need proper design to form a nice to handle and attach unit for the Super 8 camera.
NOTE: current design requires the removal of the super 8 camera filmgate. Usually unscrewing 2 screws and reversible. Plus opening up the side window that most cameras have for viewing filmtype so to allow for the miniUSB connection.
For details see: www.twitter.com/super8digital and an example shot at: https://youtu.be/--0C1HG0bQk

We're developing an alternative solution. A 3D printed cartridge that holds an Aptina sensor and connects to a Development board. First test result: https://youtu.be/iicnFxDuyd8

Once prototype is satisfying this will be a Super 8 Digital Cartridge that work on any Super 8 camera that has flashgun synchronization for every image (such as Nizo 801). Also camera needs small adaptation: take out the film plate and open the little window that normally shows what film is loaded. If interested like my video or contact me patrick.steemers@gmail.com.