DIY KIT, LED FLASHING FORTUNE WHEEL KIT

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PID# 18035

CA$10.00
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Description

The lucky wheel is a tool to predict where the rotating disk will stop when it stops. It can also be used for number guessing games, electronic dice, lottery machines, etc. The electronic lucky wheel achieves the same function electronically. This kit configures 10 LEDs into a circle. When a button is pressed, each LED lights up in turn, and the flow speed becomes slower and slower, and finally stops on a certain LED and stops moving. If the last LED that lights up is the same as the one predicted by the player, it means that the player has "won the prize".

Circuit principle: The circuit is mainly composed of a pulse generator and a decimal counter circuit.

The pulse generator is a multivibrator composed of NE555 and peripheral components. When the button S1 is pressed, Q1 is turned on, and the 3rd pin of NE555 outputs a pulse, then the 10 output terminals of CD4017 output a high level in turn to drive the 10 LEDs to light up in turn. After releasing the button, due to the presence of capacitor C1, Q1 will not be cut off immediately. As the voltage across C1 decreases, the conduction process of Q1 gradually weakens, the frequency of the output pulse at the 3rd pin slows down, and the movement frequency of the LED also slows down. Finally, when C1 is discharged, Q1 is cut off, the 3rd pin of NE555 no longer outputs pulses, and the LED stops moving. The "prize draw" process is completed in this way. R2 determines the movement speed of the LED, and C1 determines the waiting time for the "prize draw".

Attachments

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Chasing Kit Document

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