1. Making Mini Maze Speaker https://youtu.be/uC8kDiJ6I4c
2.5 Amazing Gadgets from Aliexpress https://youtu.be/HafVBUM8mw4
3.3 Homemade Gadgets | 3 Simple Inventions https://youtu.be/QdzrXM-BDG0
4.DIY Useless Machine https://youtu.be/wwsCT3nXvzQ
5.How To Use Digital Multimeter https://youtu.be/0sCWAq1oPSI
6.6 Incredible Gadgets from Aliexpress https://youtu.be/OT1_abphHBM
7.Making Power Bank with Voltmeter Ammeter https://youtu.be/Yh5z3K39Svk
8.Homemade HDTV Antenna | Watch FREE TV https://youtu.be/Y_fE2dQK1xs
9.Making RGB Led Cable | DIY Flowing Led Cable https://youtu.be/Gz6GZ5saFGE
10. 4 Amazing Gadgets from Aliexpress https://youtu.be/Ef2xaMlBTcc
For making 4 in 1 digital le dot matrix clock check this web site to download the code and schematic:https://github.com/leonardosposina/arduino-led-dot-matrix-clock