Colourful Voice Control Rotating LED

Circuit principle: Q1 circuits form a simple amplifying circuit.

MK converts the sound signal into an electrical signal, which is coupled to Q1 via C2 for amplification.

The voltage is sent to CD4017 for counting every time a pulse arrives, the high level of the counter's Q0-9 output moves 1 bit in turn to light up the corresponding light-emitting diode, producing the effect of a water lamp.

This kit incorporates the functions of a CD4017.

The kit teaches counters, frequency dividers, and controllers. At the same time, the kit has very good effects, is interesting and practical.

Circuit function: 10 LEDs emit light in turns according to the sound volume. The louder the sound, the faster the water speed.

The higher the voltage, the brighter the LED will be, and the higher the voice control sensitivity