The passive buzzer on the control boardThe sound is mainly produced by controlling the high and low pulse signals. The sound frequency is controllable. Different frequencies will produce different ton
Spring is bright and beautiful, with bright sunshine everywhere, colorful flowers everywhere, melodious birdsong and insect chirping everywhere, and intoxicating fragrance everywhere. This is a green
I bought it for more than a year and haven't powered it up once. Alas, instead of letting it gather dust, I might as well pass it on to someone who needs it. Elite version + 4.3 inches + CAN/RS485 mod