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Tags: 8051, using, who wants to be a millionaire, fastest finger first, ten fastest fingers, fastest fingers, fastest finger first questions, 10 fastest fingers, fastest finger first project, fastest finger first using 89c51, fastest finger game, 10 fastest finger, first, finger, fastest, fastest finger first using 8051,
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14-12-2010, 10:29 AM
Post: #1
fastest finger first using 8051
Hai..i wud like to know the circuit diagram and source code of fastest finget first indicator using 8051 microcontroller.pls help.....
29-12-2010, 10:19 AM
Post: #2
RE: fastest finger first using 8051
wait for someone to post source code of fastest finger first indicator using 8051 micro controller ...
currently i checked data base of project ..but not yet sow

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29-12-2010, 12:11 PM
Post: #3
RE: fastest finger first using 8051
   

The circuit presented here determines as to which of the four contestants first pressed the button and locks out the remaining three entries. Simultaneously, an audio alarm and the correct decimal number display of the corresponding contestant are activated. When a contestant presses his switch, the corresponding output of latch IC2 (7475) changes its logic state from 1 to 0. The combinational circuitry comprising dual 4-input NAND gates of IC3 (7420) locks out subsequent entries by producing the appropriate latch-disable signal. Priority encoder IC4 (74147) encodes the active-low input condition into the corresponding binary coded decimal (BCD) number output. The outputs of IC4 after inversion by inverter gates inside hex inverter 74LS04 (IC5) are coupled to BCDto-7-segment decoder/display driver IC6 (7447). The output of IC6 drives commonanode 7-segment LED display (DIS.1, FND507 or LT542). The audio alarm generator comprises clock oscillator IC7 (555), whose output drives a loudspeaker. The oscillator frequency can be varied with the help of preset VR1. Logic 0 state at one of the outputs of IC2 produces logic 1 input condition at pin 4 of IC7, thereby enabling the audio oscillator. IC7 needs +12V DC supply for sufficient alarm level. The remaining circuit operates on regulated +5V DC supply, which is obtained using IC1 (7805). Once the organiser identifies the contestant who pressed the switch first, he disables the audio alarm and at the same time forces the digital display to ‘0’ by pressing reset pushbutton S5. With a slight modification, this circuit can accommodate more than four contestants


courtesy:
electronicsforu.com

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08-07-2011, 04:17 PM
Post: #4
RE: fastest finger first using 8051
Queries on this project fastest finger first based on microcontroller 8051.
1) how this is distributed among the contestants and how the record of time is recorded to find the fastest?
2) if two presses the switch the same time then what will it display?
3) if we press the switch simultaneously then what will be the o/p display?
4) please provide the software code also to write the microcontroller ic.

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09-07-2011, 11:09 AM
Post: #5
RE: fastest finger first using 8051
i am discuss your topics" fastest finger first using 8051 " given result bellow added

http://www.seminarprojects.com/Thread-fa...using-8051

http://www.seminarprojects.com/Thread-fa...5#pid50505
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