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Description
Price: $7.99
(as of Dec 21, 2024 02:15:32 UTC – Details)
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.
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.
Practice your soldering and learn electronics.
Designed for Beginners：Special design for electronics starter to learn to solder electronics components. Soldering project kit will improve your electronic knowledge and soldering skills in practice
Working voltage:3-6V
Warm Reminder ：DIY electronic components kit requires buyer to assemble and welding, If you don’t have any soldering experience, please read the soldering instructions and use soldering tools carefully to avoid safety problem
Chris RDecember 21, 2024
Fun kit to learn to solder.
This is a fun little kit that’s inexpensive and great to learn how to solder. I built it with my son. The silk screen and pamphlet will show you where to place the components. When finished you have a fun little roulette wheel or electronic dice. Be sure to have 3 to 6 volt DC power source that you connect to some header pins on the circuit board.
John R. Stracke Jr.December 21, 2024
Seems to require 4.5V
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 wireâin 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 workedâwhich 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.
Scott StribrnyDecember 21, 2024
Fun solder project
Fun solder project. Kit does not include a power connector/wires.
J SladeDecember 21, 2024
Missing parts
Is there anyway I can get a replacement button switch? My order was missing that part. Would have given 5 stars otherwise.
A MillerDecember 21, 2024
Simple
Easy kit. Had an LED that didn’t work.
Donald SchamberDecember 21, 2024
The 2 kits I Bought were missing a resistor
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.
DiscoDJ81December 21, 2024
Neat kit!
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.
Doug FDecember 21, 2024
Make sure you apply at least 3 volts… fun for soldering practice
Good for soldering practice. Make sure you apply 3 volts to make it work. I used three triple AAA batteries. There were no left over parts.