16. Joel the Joule Thief
17. Sawed-off USB Key
18. Micro BB Crossbow
19. Make A Hologram With Your Smartphone
20. Go Hands-Free with Alexa Voice Service and Raspberry Pi
21. Make Your Own 9V Battery-Powered USB Charger
apartmenttherapy
22. Build an Arduino-Powered Candy Vending Machine
23. Magic Mirror Hallway Dashboard
24. Submersible ROV
hackedgadgets