4th Doctor Sonic Screwdriver

thingiverse

This design is an easy-to-print mockup of the fourth Doctor Who Sonic Screwdriver. It's not an exact duplicate but close and modified to make it easy to print with a Arduino Pro Mini inside. This will provide a good platform to write interesting code for the Arduino. The circuit diagram includes a push button switch, tilt switch, 16 position rotary switch, LED, temperature sensor, and piezo speaker. Print Settings Printer: FolgerTech 2020 Prusa i3 AL Rafts: No Supports: No Resolution: .25mm Infill: 50% Notes: The threads on the screw cap (Tube4) and base (Tube1) are pretty small. This may cause your biggest problems printing. The original 4th Doctor Sonic is silver. Post-Printing Assembly of the Shell For wiring, I recommend using wire wrap or 24 gauge solid core wire. Drill out Tube3 with a 1/4" bit from both the bottom and front so that an LED can be mounted. Solder two thin wires to an LED and thread them through Tube3 and Tube2 (don't forget to mark the anode wire). The LED, Tube3, and Tube2 can now be glued together. Insert the piezo speaker into Tube2 and solder two wires. Create the daughter board as shown in 4thsonic.jpg. Solder two wires to the push button switch. Drill two holes on Tube1 about an inch down from the top where the push button switch will be mounted and the rotary switch can be accessed. Use epoxy putty to mount the push button switch. Thread all the wires through Tube1 and glue Tube1 to Tube2. Attach the Arduino Pro Mini as shown in 4thsonic.jpg. Attach the FTDI board to the sonic and program. Stuff all the wires and then the Arduino into the base and connect the battery. Custom Section Parts List: Sparkfun Arduino Pro Mini 328, 5v/16mhz 1 LED (any color) 220 Ohm 8 pin Single-In-Line (SIL) resistor network Piezo Buzzer - PS1240 (.47” diameter) LM35 Temperature Sensor Mini Rotary Switch (such as Raraohm SDR-16CT) Pushbutton switch (use a switch with a tall button and small base, space is tight). SW-520D Lacoste Ball Switch FTDI Adapter USB Controller Tiny Circuits Tinyduino 3.7v Battery