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Electronic Dice NE555 LED Module CD4017 DIY Kit 5mm Red LED 4.5-5V LED Dice Parts Fun Breadboard Diy Electronic

Electronic Dice NE555 LED Module CD4017 DIY Kit 5mm Red LED 4.5-5V LED Dice Parts Fun Breadboard Diy Electronic

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$2.34 USD
$3.51 USD $2.34 USD
Sale Sold out
Condition : New
Type : Module


 
 
Type
electronic module
Kit parameters: Power supply voltage:4.5-5V Function play method: Players simulate "dice rolling" by pressing S1The points obtained are indicated by 7 LEDs.Like physical dice,they can indicate 1-6 points.Electronic dice achieve the same function electronically.When you press the key,each LED flashes.When you release the key,the flashing speed becomes slower and slower.Finally it stops at a certain point and doesn't move any more so that the points can be displayed. Circuit principle: The circuit is mainly composed of a pulse generator and a 5-ary counter circuit. The pulse generator consists of NE555 and peripheral components to form a multivibrator.When the key S1 is pressedQ1 is turned on and the three pins of NE555 output pulses,the five output terminals of CD4017 output high-eve drive in turn to display different points(1-6).After releasing the keyQ1will not be cut off immediately due to the storage capacity of capacitor C2.With the decrease of voltage at both ends of C2,the conduction program of Q1 will gradually weaken,the frequency of output pulse of pin 3 will slow down,and the change speed of points will also slowdown.Finally,when C2 discharge is over.Q1 is off,the 3 pins of NE555 no longer output pulses,and the number of points stops changing.A dice rolling process is completed.R2 determines the movement speed of the LED and C2 determines the time to wait for the dice Circuit diagram:
The circuit board uses FR-4 military grade A material plate,plate tolerance and the stability of some parameters,A material performance is very strong,which is in the interest of some other plate expensive price.The parameters of components are printed directly on the PCB board,which can be welded directly without reference to the circuit diagram,which is convenient. 1.Double-sided wiring,tin-sprayed pad and increased tin processing pad,can withstand repeated disassembly welding not easy to fall off; 2. It is not easy to self-bending(refers to the bending caused by non-human conditions),the poor plate will bend with the change of time and the environment. 3. Impedance is more stable and reliable.
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