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Working Voltage: 3V-6V
circuit principle:
Circuit principle: The circuit is mainly composed of a pulse generator and a decade counter circuit. The pulse generator consists of NE555 and peripheral components to form a multivibrator. When the button S1 is pressed, Q1 is turned on, and pin 3 of NE555 outputs pulses, and 10 output terminals of CD4017 output high levels in turn to drive 10 LEDs to emit light in turn. After the button is released, Q1 will not be cut off immediately due to the presence of capacitor C2. As the voltage across C2 drops, the conduction process of Q1 will gradually weaken, the frequency of the output pulse of pin 3 will slow down, and the frequency of LED movement will also follow. slow down. Finally, when the discharge of C2 ends. Q1 cuts off, pin 3 of NE555 no longer outputs pulses, and the LED stops moving. This completes the drawing process. R2 decides the speed of LED movement, and C2 decides the time to wait for the lottery.
Product Description:
The lucky turntable is a tool to predict where the rotating disc will stop when it stops. It can also be used as a number estimation game, electronic dice, lottery machine, etc. The electronic lucky turntable achieves the same function in an electronic way. This kit configures 10 LEDs into a circle. When the button is pressed, each LED lights up in turn. At the beginning, the flow speed is very fast. It seems that all The LEDs seem to flicker all together, and the flow speed will become slower and slower, and finally stop on a certain LED and stop moving. If the last LED that lights up is the same as the player predicted, it means you have won a prize.
Donald Schamber
Reviewed in the United States on September 11, 2024
I had to get 10k resistors from my Arduino kit to use for the 10k resistor missing fom each kit.Neither kit worked. They was just for soldering practice. I may have over heated the battery input connector socket.A kit I bought from another company works.One star because the same piece was missing from both kits.
Chris R
Reviewed in the United States on June 12, 2024
The media could not be loaded.
DiscoDJ81
Reviewed in the United States on January 10, 2024
Kit arrived timely. Am using to teach son how to assemble electronic parts and solder them to a board. So, taking one step at a time. Would order again from this seller.
Scott Stribrny
Reviewed in the United States on April 26, 2024
Fun solder project. Kit does not include a power connector/wires.
A Miller
Reviewed in the United States on April 22, 2024
Easy kit. Had an LED that didn't work.
J Slade
Reviewed in the United States on July 18, 2023
Is there anyway I can get a replacement button switch? My order was missing that part. Would have given 5 stars otherwise.
John R. Stracke Jr.
Reviewed in the United States on December 11, 2023
The enclosed instructions are inadequate in a couple of ways.First: they tell you that the positive side of the electrolytic capacitors is the one with the long wire—in fact, one of them has no long wire. (Fortunately, they're both marked similarly, so I was able to infer that the side with a white stripe was the negative side.)Second: they tell you that the circuit requires 3-6V. When I powered it with 3V, nothing lit up. 4.5V worked—which makes some sense, since most ICs run at about 5V. (I don't know for sure that the ICs in this project run at 5V; I'm just guessing from the fact that 4.5V worked.)But it was fun, and it worked fine once I had the right voltage.
Doug F
Reviewed in the United States on October 12, 2023
The media could not be loaded.
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