Digital Dice circuit
A electronic friends was seeking a play circuits in your free time,a cheap and easy to made.This dice digital circuit would be a favorite of everyone, by using it to display the numbers.
When you switch to a spin button or it like is tossing a dice. Looks like a random form normally.
A heart of this circuit,an a stable oscillator 1Khz with IC 555 and RC networks,it will be output to IC2 is Decade counter IC – 4017.
When I turn off the spin switch, it will be converted to a binary input with a diode matrix D1-D9 (1N4148 or number 1N914) and then changed to a 7 segment display with a decoder drive IC No. CD4511 (IC3).
The brightness of the numeric display, may be customized by adjusting the value of R3.
Unless this circuit we also have other circuit that use principle same.
Random number with led 1 digit
This is a circuit diagram showing the random nature of LED 7 segment. In the diagram circuit IC1 – LM555, R1, R2 and C2 on the circuit a sensitive multi-Stable Brett Foster (Astable. multivibrator circuit) function generator signal square (Square Wave) and send the pin 3 of IC1. It can change the frequency by VR1. and often to the leg 14 of IC2, it acts as a circuit of dozens, the output of IC2- SN7490 sent to the input pin of the IC3 – SN7447. The IC3 serves to decode (code BCD) to drive the 7-Segment a common anode, in order to display the numbers 0 through 9.
Work will take place, when a circuit switch S1 Stable multi-sensitive Brett Foster (Astable multivibrator circuit) rectangular waveform generator (Square Wave) resulted in a 7-Segment Display is a number 0-9. By are ordered from 0 to 9, starting at 0 new, which will render this indefinitely. The speed display is based on the frequency of Astable. multivibrator circuit. At the same time that capacitor C1 will be fully, when the switch S1 to C1 will be discharged out completely, to stop the display immediately. Leave fingerprints on the switch S1, to the 7-Segment Display is a little out 0-9.
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