Raspberry Pi Pico back-lit 'mind your head' sign with ultrasonic sensor – Part 2
In part 2 of this simple Raspberry Pi Pico project, I’m following up on the wiring and coding from Part 1 ( • Automated Raspberry Pi back-lit 'mind your... ), by making the 3D printed text screen and case for my ultrasonically triggered ‘mind your head’ sign, which lights up when anyone comes within range. And just to give a final warning to anyone who gets really close, I’m adding a buzzer – all of which is then soldered to my Pico inside the case.
The 3D printed screen and case STLs are available to download here: https://paterpracticus.com/rpi-pico-w....
Final shopping list:
Standard Raspberry Pi Pico: £3.80 (ThePiHut).
Ultrasonic Distance Sensor - 3V/5V - HC-SR04 compatible (RCWL-1601): £3.90 (ThePiHut).
White LED Backlight Module - Medium 23mm x 75mm: £2.40 each (ThePiHut).
Passive buzzer: 80p (ThePiHut)
56 Ohm resistor, M2.5 nuts and bolts, DCC concepts decoder wires
Filament:
GIANTARM Classic Transparent PLA £15.19/kg
eSun Matte Deep Black PLA £17.99/kg
eSun Matte Milky White PLA £17.99/kg
Timecodes:
0:00 Intro
0:19 Recap
0:48 Part 2: Screen design
3:58 Slicing and printing
7:35 Top case design
8:56 First assembly
10:48 Buzzer hardware
11:32 Adapting code for buzzer
14:00 Final assembly
17:55 Soldering
23:08 Finishing the case