EMF Pickup Device

I went with a very pasta like route for creating this one. (Version 1.0) Its rather cluttered looking and is mostly made of curves with pipe and surface extrusion commands. This caused some weird aspects but was rather quick. Likely will not be the most efficient to print though.

I made the body all one piece, the board is slid in from the rear in both cases and then screwed to mounting tabs.

Although there are mounting positions for both circuit boards only one can be in use at once due to clearance issues.

For now this is considered a prototype since I would like to create one with a more unified form language and maybe more planar styling.

Not even the battery compartment has been test printed yet so do so at your own risk. Hopefully a print will get set up over the weekend or on Monday.

This is designed to go around the wrist like the previous model but this has rod like connections to allow for the use of elastic webbing, so this will be an additional step unless it fares better as a handheld device. Maybe a gun (or likely drill like in appearance) model would be nice, then you could just point at what you want to listen to.

I finished up the second PCB; the MS OT 118S 01

This way I can make it so both are compatible. These are both pretty affordable and seem to do the trick well while having similar form factors. I don't recall the actual tape player name right now so I'll have to update that later. This PCB model is a little bit lower resolution since it was so cluttered and components are all over the place as opposed to surface mount components.

There is also a motor output and switch wire bridge that need to be closed, I might route a small LED through these.

Right now I'm thinking both devices will be always on unless battery is disconnected.

I need to do some preliminary work on another project so it might be a little while before I get to the actual case design for this project.

I also want to research speaker and transducer output as opposed to headphones as an option.

I've been delayed due to finals week and a decision to model a second circuit board from another machine so that the case can work with both types.

The old case was pretty ugly;

but now the PCB has been extracted;

Liberated! Time to design a new case!

Right now I've built all components in the computer so I'm planning on playing around in rhino for a bit for layout and then doing the main case body in Gravity Sketch next week then final touch-ups in rhino or Solidworks.

I started by making a physical cad file of the PCB, sensor and volume control. This will be used to make the case around and decide where to lay out components.

A few things are generalized like the solder pads on the main board but this should make for a good Jensen SCR-68C reference file. 

Anyways, if you read the article you'll notice they comment on how the casing looks pretty terrible. It was, indeed terrible. Essentially a bunch of polystyrene glued together.

It worked, but damn was it ugly.
So, considering i'm busier than ever and doing too many side projects as it is I figured what was the harm in one more. So a new case it is!

I'm not planning on changing the circuit board much right now, its been heavily modified already. This project was initially inspired by Kreosan! See:

Jensen SCR-68C Stereo Cassette Player with AM/FM Radio ~$18 and overkill.