This project aims to improve OpenShock shockers by replacing the stock electrodes that are designed for dogs, not humans.
By using a custom 3D-printed bottom case, we remove the need for a spacer, making the shocker flatter and more comfortable.

• Decrease total shocker height by 1.3 cm
• USB-C charging
• Customization (color, text, ...)

• Full functionality including Shock, Vibrate, and Beep
• Same shocker strength (if not slightly stronger)

• Water tightness. But it's still water resistant - just don't go swimming with it

• 1× USB-C port AliExpress link or AliExpress link (There are two versions, both work) (look around there might be a cheaper listing)

  

• 2× 15 mm stainless steel discs AliExpress link
  (Thickness: 1.4 mm. The gold-plated version is highly recommended, the raw steel is almost impossible to solder)

• Case in PLA
• Clip in PLA
• Plug in 95A TPU (optional)

(Tested on Prusa Core One and Bambulab H2D and A1)

• 0.4 mm nozzle
• 0.1 mm layer height
• 15% infill
• Supports only on build plate
• Support overhang angle below 45° (only the strap loops and the upper part of the USB port should be supported)

Optional:

• Concentric bottom layer looks nice
• Satin or smooth build plate

1. Gently sand the top of the USB port hole where the support was attached. Check fit with the USB port from the outside until it just fits

2. Insert the USB port from the inside. The solder pins should go up and the resistors down (you will need a bit of force)

3. Move the USB port all the way back and secure it from the inside using the 3D-printed clip

4. (Optional) put in the TPU plug from the outside

5. Take the PCB and gently remove the battery

6. (Optional) for safety desolder the battery

7. Desolder both springs originally used for charging. If you have trouble desoldering the big one you can alternatively cut it

8. Connect thin wires (e.g. 30AWG for wire wrapping) to the pins where the springs were connected and feed them through the hole in the PCB

9. Check polarity (see picture): the big spring was negative and the small spring positive

   

10. Connect to the USB port accordingly. The outer small gold contact on the side marked with V is positive

11. (Optional) lightly sand the top side of the discs for better soldering and glue adhesion (might be unnecessary)

12. Solder thicker wires (e.g. 22AWG) to the stainless steel discs. Keep the solder spot as thin as possible

    (I had some problems with flux, so I first put solder on the soldering tip, waited for the flux to burn off, then applied it to the disc)

13. Put the wires through the electrode holes and solder them directly to the shocker contacts (no need to desolder them)

14. Put the electrodes in their holes and arrange the wires so the vibrator can spin freely

15. Bend the antenna to clear the USB port and assemble the case to test if everything fits

16. Glue in the electrode discs from the inside using thin super glue

    

17. Screw the case together

18. Enjoy 😸

Discord: Nova_Max

If you plan to use this design or any part of it for commercial purposes, please contact me first