This is a design to help regulate voltage use which consists of a switch for the main power source and a potentiometer to adjust the output voltage. This can be used as a static designed attached to the side of your work bench giving you full voltage control from a DC socket.

My use case

Designed to allow me to control a hand held motor (my next project) for cutting / sanding 3D parts.

Example https://youtube.com/shorts/Si6LcVitMbY?feature=share

Parts:

• 1 x LED light
• 1 x 390 Ohm resistor
• 1 x 10K Potentiometer: https://www.amazon.co.uk/dp/B07WQG1RNZ
• 2 x Dc Power connectors: https://www.amazon.co.uk/dp/B0BY161TY7
• 1 x Toggle Switch: https://www.amazon.co.uk/dp/B07J4KB38W
• 1 x MOSFET transistor: https://www.amazon.co.uk/dp/B096FH2FJS
• 1 x 4cm x 6cm Prototype board: (Product unavailable but something similar) https://www.amazon.co.uk/dp/B074X2GDH2

Materials used:

• 18 AWG Solid Wire: https://www.amazon.co.uk/dp/B085TP7G5B
• 4 x M4 Thread Inserts + bolts
• 4 x M2.5 Thread inserts + bolts (NOTE: I already have 4 screws / bolts and the following link will not provide the necessary bolts needed). Bolts: https://www.amazon.co.uk/dp/B09BG4Z2V1 Thread inserts: https://www.amazon.co.uk/dp/B09PBJHMND

Prepping the Box:

• Print container
  • I am still learning so I am not quite sure if supports are needed or not but I just did them any ways.
• Print container side panel
  • No supports required
  • May need some sanding just for it to fit smoothly into the container
• Insert the four M4 insertable threads.
• Insert the M2.5 insertable threads
  • I never managed to print so the holes aligned up so I just used one of the four threads instead.

Prepping the electronics:

For soldering, follow the below diagram

Key notes:

• Circles represent the component cables slotting into the board
• Green: Switch
• Dark Blue: MOSFET Transistor
• Light Blue: Potentiometer
• Gold: Resistor
• Yellow: LED
• Red: Positive wires
• Black: Negative wires
• White: The underside solder to connect two spots.

Upgrade ideas:

• Digital display to view the Voltage

Next steps:

• Building a small hand tool (similar to a dremel tool)

Enjoy!

I am aware that I might be missing some information here and there so please feel free to comment if you have any questions or ideas.