In cricket stumps with flashing LED are used.
They glow when ball hits the stumps.
This project is for Cricket Stumps and Bails LED Indicator Circuit
It uses light sensor and LM3909 IC.
Power comes from small 3V coin cell.
It is low cost and is easy to build.
Circuit Working:
Working of Bails LED Flasher Circuit:
Parts List:
| Component Type | Value | Quantity |
|---|---|---|
| Resistors | 750Ω 1/4 watt | 1 |
| 220Ω 1/4 watt | 1 | |
| 39Ω 1/4 watt | 4 | |
| Capacitor | Electrolytic 1000µF 16V | 1 |
| Semiconductors | IC LM3909 | 1 |
| Phototransistor | 2 | |
| LED Red 5mm 20mA | 4 | |
| Battery 3V Coin Cell | 1 |
This circuit also uses IC1 LM3909 but has two Phototransistor sensors T1 and T2.
Both sensors work together for better detection.
When bail moves or light changes then sensors conduct.
Conduction signal goes to IC1 input.
IC1 makes four LEDs blink alternately.
LEDs connected with resistors for current limit.
Red LEDs flash bright to show bail is disturbed.
Battery 3V gives supply with small size fits inside bail.
Working of Stumps LED Flasher Circuit:
This circuit uses IC1 LM3909 and one Phototransistor sensor.
When ball hits the stump the sensor detects change in light.
Sensor transistor conducts and gives input to IC1.
IC1 is LED flasher IC and it makes LEDs blink.
Four red LEDs glow through resistors.
Flash effect happens quickly so stump looks bright.
Power comes from 3V battery.
Circuit is very small and can fit inside the stump.
How to Build:
To build a Cricket Stumps and Bails LED Indicator Circuit follow the below mentioned steps for connection:
- Collect all parts shown in circuit diagram.
- Pin 2 of IC1 connect to positive of capacitor C1.
- Negative of C1 connect to IC1, LED cathode and resistor R1.
- Pin 4 of IC1 connect to negative of 3V battery.
- Pin 5 of IC1 connect to one side of sensor T2.
- Other side of T2 connect to LED anode.
- Pin 8 of IC1 connect to LED cathode.
- Sensor T1 one side connect to resistor R1.
- Other side of T1 connect to negative of 3V battery.
References:
What’s the circuitry work behind the glowing LED stumps used in cricket?