The image shows a circuit using an IC 555 timer in bistable mode (flip-flop mode). This means it can stay in either ON or OFF state until triggered by a button.
Circuit Explanation:
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IC 555 is configured in bistable mode:
- The ON button connects pin 2 (trigger) to ground when pressed. This causes pin 3 (output) to go HIGH, turning ON the red LED.
- The OFF button connects pin 4 (reset) to ground when pressed. This resets the IC, making pin 3 (output) go LOW, turning OFF the red LED and ON the blue LED (assuming the blue LED is connected to positive voltage through a resistor).
LEDs:
- Both LEDs have current-limiting resistors.
- The red LED lights up when the output is HIGH.
- The blue LED lights up when the output is LOW (if connected to Vcc through the output).
Yes, it can easily be built on a breadboard. You’ll need:
- One 555 timer IC
- Two Normal Switches instead of push buttons
- Two LEDs (red and blue)
- Three resistors for LEDs (around 220–330 ohms)
- One power supply (like 5V)
- One Capacitor
- A breadboard and jumper wires
If you want to learn, please you can visit Bistabe Mode Using 555 Timer - Online Circuit Simulator | DCACLab