The Simple Electronic Game Scorer Circuit has been meticulously crafted to tally and exhibit scores during gameplay.
This system, while simple proves to be an efficient digital counting mechanism that incorporates a IC 555 timer, IC 74LS192 a decade counter, a IC 74LS247 BCD to 7 segment decoder and a 7-segment display.
Its versatility allows for widespread application in various gaming scenarios, quiz competitions and serves as an excellent educational project for those passionate about electronics.
Adhering closely to fundamental counter principles this circuit is particularly suitable for novices in the field.
It can be conveniently powered by a regulated 9V DC power supply.
Circuit Working:
Parts List:
| Component | Value / Part No. | Quantity | Notes |
|---|---|---|---|
| Resistors (1/4 Watt) | 100k | 1 | |
| 10k | 1 | ||
| 1k | 1 | ||
| 560Ω | 2 | ||
| Capacitors | Ceramic 0.01µF | 1 | |
| Ceramic 2.2µF | 1 | ||
| Semiconductors | IC 555 | 1 | |
| IC 74LS192 | 1 | ||
| IC 74LS247 | 1 | ||
| Switches | Push button | 4 | |
| Display | Seven-Segment LED Common anode type | 1 |
In this post the 555 IC1 creates a pulse every time a button is pressed.
The timing parts, which are resistors R1 and R2 and capacitor C2 are really important because they decide how long the pulse lasts.
This pulse then goes to IC2 which is a synchronous up/down counter called the IC2 74LS192.
Every time IC2 gets a pulse from the 555 timer, it increases its stored number.
This number is kept in a special way called binary-coded decimal BCD.
The BCD output from IC2 is sent to IC3 the 74LS247, which changes the BCD signal into something that a 7-segment display can show.
When you press the button S2, IC2 counts up but if you press S3 it counts down.
IC3 takes the count and decodes it so that the score can be seen on the seven-segment LED display.
To start counting again, you need to press S1 to reset the count then either S2 or S3 and finally S4 to see the score.
The 7-segment display used here is the LTS 542 model, which clearly shows the score in numbers.
Formulas with Calculations:
Below mentioned are the Formulas with Calculations for Simple Electronic Game Scorer Circuit:
555 Timer Pulse Width Calculation:
T = 1.1 × R1 × C2
where,
R1 = 100k
C2 = 2.2μF
T = 1.1 × 100,000 × 2.2 × 10^(-6)
T = 0.242 sec approximately
Current Limiting Resistor Calculation for Display:
R = (V – Vf) / I
where,
- V is 5V operating voltage
- Vf is 2V forward voltage of LED in 7 segment display
- I is 10mA LED operating current
- R is (5V – 2V) / 10mAR = 300Ω (using 560Ω for safety)
How to Build:
To build a Simple Electronic Game Scorer Circuit follow the below mentioned steps:
- Gather all the components mentioned in the above circuit diagram.
- Connect pin 1 of IC1 to GND.
- Connect pin 2 of IC1 to pin 6 of IC1.
- Connect resistor R1 between pin 6 and pin 7 of IC1.
- Connect resistor R2 from pin 7 of IC1 and positive supply.
- Connect pin 3 of IC1 between switch S2 and S3.
- Connect pin 4 and pin 8 of IC1 to poistive supply.
- Connect pin 5 of IC1 to GND through capacitor C1
- Connect S1 switch and resistor 1k resistor in series from positive supply and GND.
- Connect pin 1, 8,9,10, 15 of IC2 to GND.
- Connect pin 3 of IC2 to pin 7 of IC3.
- Connect pin 4 of IC2 to one end of switch S3 and other end of S3 connect to one end of switch S2.
- Connect pin 5 of IC2 to one end of S2 switch and other end of S2 switch connect to S3 switch.
- Connect resistor R4 from pin 4 of IC2 and positive supply.
- Connect resistor R5 of IC2 from pin 5 and positive supply.
- Connect pin 2 of IC2 to pin 1 of IC3.
- Connect pin 6 of IC2 to pin 2 of IC3.
- Connect pin 7 of IC2 to pin 6 of IC3
- Connect pin 16 and pin 11 of IC2 to positive supply.
- Connect pin 14 of IC2 between switch S1 and R3 resistor.
- Connect pin 8 of IC3 to GND.
- Connect pin 16 of IC3 to positive supply.
- Connect pin 13 of IC3 to display pin (a) as shown in circuit diagram
- Connect pin 12 of IC1 to display pin (b) as shown in circuit diagram
- Connect pin 11 of IC1 to display pin (c) as shown in circuit diagram
- Connect pin 10 of IC1 to display pin (d) as shown in circuit diagram
- Connect pin 9 of IC1 to display pin (e) as shown in circuit diagram
- Connect pin 15 of IC1 to display pin (f) as shown in circuit diagram
- Connect pin 14 of IC1 to display pin (g) as shown in circuit diagram
- S4 is connected to the 9V DC power supply to turn the circuit ON/OFF
Conclusion:
The Simple Electronic Game Scorer Circuit is an easy and useful way to create a digital scorekeeper for games.
It uses a IC 555 timer, a decade counter, and a 7-segment display to show scores in real-time.
This project is a great hands on activity for beginners who want to learn about digital electronics and how to design circuits.
With a few small changes, you can make the circuit work with multiple displays or even set it up for automatic scoring.
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