Lucky Turntable Led Flashlight Diy Electronic Kit Welding Project Training Module Diy Kit

Description Function play the lucky wheel is a tool to predict where the rotating disc will stop when it stops It can also be used as number estimation games electronic dice lottery machines etc The electronic lucky wheel achieves the same function by electronic means In this kit 10 LEDs are configured into a circle When the power switch is turned on and the start button is pressed each LED lights up in turn At first the flow speed is very fast It seems that all LEDs flash together and the flow speed will become slower and slower Finally it stops at a certain LED and does not move If the last LED is the same as the player s prediction it means winning the prize Circuit principle The circuit is mainly composed of pulse generator and a decimal counter circuit The pulse generator is a multivibrator composed of NE555 and peripheral components When the key S1 is pressed Q1 is turned on and the three pins of NE555 output pulses then the ten output terminals of CD4017 output high level in turn to drive ten LEDs to emit light in turn After the key is released Q1 will not be turned off immediately because of the existence of the capacitor C2 With the decrease of the voltage across C2 the turn on procedure of Q1 will gradually weaken the frequency of the three pin output pulse will slow down and the LED moving frequency will also slow down Finally when C2 discharge is over Q1 turns off the 3 pins of NE555 no longer output pulses and the LED stops mo