Reaction Timer Game with 7 Segment
This is a game for two players. Player 1 presses the START button. This resets the 4026 counter chip and starts the 555 oscillator.
The 555 produces 10 pulses per second and these are counted by the 4026 chip and displayed on the 7-Segment display.
The second player is required to press the STOP button. This freezes the display by activating the Clock Inhibit line of the 4026 (pin 2).
Two time-delay circuits are included. The first activates the 555 by charging a 10u electrolytic and at the same time delivering a (high) pulse to the 4026 chip to reset it. The second timer freezes the count on the display (by raising the voltage on pin 2) so it can be read.
The speed with which the numbers change can be controlled by the
capacitor at pin 2 of 555 IC or by changing the resistance between pin
2,3 of 555.
The value of capacitors can be 10uF,1uF,2.2uF and others can also be used but with 10uF the game is easy with 2.2uF its difficult and with 1uF its most difficult as the numbers change very fast so its difficult to stop at particular preselected number.
The 555 produces 10 pulses per second and these are counted by the 4026 chip and displayed on the 7-Segment display.
The second player is required to press the STOP button. This freezes the display by activating the Clock Inhibit line of the 4026 (pin 2).
Two time-delay circuits are included. The first activates the 555 by charging a 10u electrolytic and at the same time delivering a (high) pulse to the 4026 chip to reset it. The second timer freezes the count on the display (by raising the voltage on pin 2) so it can be read.
The value of capacitors can be 10uF,1uF,2.2uF and others can also be used but with 10uF the game is easy with 2.2uF its difficult and with 1uF its most difficult as the numbers change very fast so its difficult to stop at particular preselected number.
COMPONENTS USED :
1.one Common Cathode 7 Segment
2.one 555 IC
3.one 4026 IC
4.two push buttons
5.three 10uF Electrolytic Capacitors
6.three 100k Resistances
7.one 68K Resistance
8.one 1nF Ceramic Capacitor
9.one 6-12v Power supply
