The 9V attachable electroscope has been updated. The silkscreened date on the back for this version is 2014-08-24(!)

Changes

• Pulled copper pour near inputs back
• Removed polyimide/kapton shield
• Simplified antennae construction

One slight quirk with nearly all of these electroscopes is that they appear to be hard ‘on’ after assembly sometimes. In many cases i’ve found that this is due to residual flux (of the water washable type).

I’ve had success by scrubbing down with isopropyl alcohol and reflowing again with hot air.

Fabrication

You can find the necessary sources, gerbers, and files here. The BOM is identical to the older version.

The OSHPark shared project for direct fabrication can be found here.