I have check some posted, some bloggers said capacitor is not necessary is that true? Also, can I use micro-USB for powering instead of DC socket + power supply (>4A)? Many thanks!
Its not necessary, but highly recommended!!
You can destroy your powersupply without capacitor!
You can use USB, but you should avoid using high brightness. This could also destroy your USB Port
Blueforcer Thank you so much!