Do you want to learn how to use 7-segment display LED's? Here you will learn how to build retro-style displays with 7-segment LED's. Shown is how these displays work, how to multiplex them to get an array of digits, and the code to display a 0-20 VDC volt meter and thermometer.
Other useful tutorials
Temperature sensor shootout: https://youtu.be/D_gdVpZjk4E
Writing and reading to SD cards: https://youtu.be/yr6vejsvxQw
Saving settings even during MCU power down: https://youtu.be/zB0O_W62xYE
Getting those darn TFT LCD displays to work: https://youtu.be/XOlAo_599M4
Turning stuff on or off: https://youtu.be/wZQbdLxppE8
Writing analog signals/voltages: https://youtu.be/c7e-ZsEyZdM
Using digital sensors: https://youtu.be/E8QcIm_nKJ4
Using analog sensors: https://youtu.be/DrOb6vd7O08
Talking to your Arduino: https://youtu.be/iZ7mI3tRZjM
Some fun projects to build
Build a 3D printer filament meter: https://youtu.be/YZDRbHPOgWU
Homemade motorized table saw fence https://youtu.be/_mubBqKiNc0
High"er" res homemade Thermal Camera for $100: https://youtu.be/1EBoug27hrA
DIY Garage Parking Assistant: https://youtu.be/-45MwNsbQ_4
