Random number generator based game
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This circuit functions as both a random number generator and a game. It uses a NE555 timer IC to generate clock pulses that are fed into three CD4033 counter ICs connected to 7-segment displays. When the toggle switch is flipped, the clock frequency slowly decays from 35 kHz to 65 Hz over 15 seconds before stopping at a random 3-digit number display. The goal of the game is to match all three displays for points.
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Random number generator based game
- 1. Random Number Generator Based Game Thiselectronicgame issimulationof one-armbanditgame.Electronicshobbyistswill finditvery interesting.Whentoggle switchS1is inrunposition,all segmentsof 7-segmentdisplays(DIS1through DIS3) will lightup.Onturningtoggle switchS1fromrunto stopposition,displayeddigitswillcontinue advancingandthe final displayisunpredictable.Thusthe final numberdisplayedinDIS1throughDIS3 is of randomnature.The speedwithwhichthe numberin7-segmentdisplaykeepschangingonflipping switchS1 from runto stopconditionslowlydecaysbefore stoppingwitharandomnumberdisplay.To playthisgame,one has to obtainthree identical numbersindisplaysDIS1throughDIS3. The contestantwouldscore 1 (one) pointif he managestoget a final displayof 000,2 pointsfor getting111 display,3 pointsfor222, and so onuptoten pointsfor999. He shouldtry to score maximumpossible pointsinfixednumbersof attempts(say,20to 25 attempts).Apartfromusingthis circuitas a game for entertainment,one canuse itas randomnumbergeneratorforanyother applicationaswell.The decaytime withthe givencomponentvaluesisaround15 secondsbefore the displaycouldstopat a final randomnumber. Circuit diagram:
- 2. The circuit comprisesclockoscillatorbuiltaroundNE555 timerIC4, three-stage clockpulsecounterbuilt usingthree CD4033 ICs (IC1 to IC3),and three 7-segmentLEDdisplays(DIS1toDIS3). Inclock oscillator circuit,NE555 timerIC4 is usedina similarwayas a free-runningastable multivibrator,the only difference beingthe additional capacitorC1introducedbetweenpinNo.7of IC4 and junctionof resistorsR22 and R24. Whentoggle switchS1 isinrun position,bothterminalsof capacitorC1 are shortedbyswitchS1 and timerIC4 worksas a free-runningastablemultivibrator.The operating frequencyisinthe vicinityof 35 kHz,determinedbythe value of timingcomponents. Whentoggle switchS1 isflippedfromruntostopposition,capacitorC1isintroducedinthe discharge path of pinNo. 7 of IC4 and junctionof resistorsR22 and R24. At the same time,capacitorC4 comesin parallel withtimingcapacitorC3 to change the operatingfrequencyof the astable fromaround35 kHz to around65 Hz. Nowcapacitor C1 slowlystartschargingasit isconnectedinthe discharge pathof the timingcapacitorsC3 and C4. The clockfrequencyof IC4 graduallyreducesandafter15 seconds,when capacitor C1 is sufficientlycharged,the oscillatingfrequency graduallydropsandfinallyitstops oscillating.Thus,pin3of IC4 becomeslow. Secondpart of the circuitcomprisesthree cascadedICs,IC1throughIC3 (CD4033 decade upcounter cum 7-segmentdecoder).Inconjunctionwiththree7-segmentdisplays(DIS1toDIS3),these forma 3- digitclockcounter.The clock countingspeedisdependentuponthe clockpulse frequencyof IC4.It is connectedtoclock inputpin1 of IC1 while chipenable pin2of IC1 to IC3 are heldlow.Thusall clock counterICs advance by1 for everypositive clocktransition.Resetpin15 of all counterICsis heldlow throughresistorR25. Thus resetfacilityisnotusedinthiscircuit.Due to persistence of vision,one cannot distinguish0-9countinginDIS1 to DIS3 whenthe clock frequencyishigh. All 7-segmentdisplaysappeartoshowdigit8,while the redLED1 remainslitcontinuously,indicating clock counterisinrunningcondition.Onslidingtoggle switchS1fromrunto stopposition,the countingspeedof individualdigitsfallsimmediatelydue tothe clockfrequencychangingtoaround65 Hz. Now,the countingspeedwillbe 65 Hz for DIS3, 6.5 Hz for DIS2 and 0.6 Hz forDIS1. This speedof individualdigitcountingslowlydecays,until the counterstopsandLED1 stops blinking,andthe final count (randomnumbers) are displayedinDIS1,DIS2,and DIS3.