The first model used a cheap microphone transducer mounted into the body of the violin. This was amplified by a pre-amp. There were a lot of problems with feedback and noise from the strings. A fairly standard guitar style tone/volume arrangement was used. This causes problems as it can load the amp too much. A variable gain system would be more appropriate.
Different bridges were experimented with. The neck and fingerboard were carved from a single piece of pine.
Things which would change if when I get around to making a second violin. I think the more traditional split of body and fingerboard will make things easier to construct. A separate fingerboard also allows different woods to be used and the neck to be hollowed slightly to reduce the weight. Electric violin II will be based on a single stick shaped solid body made from maple with an ebony finger board. The pickup will be a piezo electric transducer connected to a modified bridge. The tuning will be via minature machine heads mounted on the chin end to keep the centre of gravity towards this end. Diagrams and pictures at a later date.