Summative Circuit 555-Timer Traffic Light

This is a red blinking light circuit, designed to work somewhat like a traffic light circuit.

Tools Needed:

1. Wires
2. 2 555 Timers
3. LED
4. Resistors(330 ohms , 560 ohms x 2, 100k ohms, and 47k ohms)
5. 2 100 microfarads capacitors
6. Battery & Battery Cap
7. Breadboard

Place 555 Timer IC On Breadboard

Place wire from Pin 1 of the 555 Timer to negative rail.

Then, place wire from Pin 8 to positive rail.

After, place wire from Pin 4 to Pin 8.

Then, place wire from Pin 2 to Pin 6.

After, place 100k ohms resistor from Pin 3 to Pin 6.

Finally, place a capacitor from Pin 2 to the negative rail.

Place another 555 Timer IC

Connect Pin 3 from the first timer to Pin 8 of the second timer.

Pin 1 of second 555 timer goes to negative rail via the wire.

Pin 2 to Pin 6

Place 47k ohms resistor from Pin 3 to Pin 6.

Pin 4 to positive rail via wire.

Finally, place the second capacitor to negative rail via the Pin 2 of the 555 timer.

Place the LED

Connect the wire from the anode of the LED to the positive rail.

Pin 3 of first timer to the 560 ohms resistor.

Place the resistor to the c41 hole.

Attach Battery cap to Battery, then put the positive wire from the battery cap to the positive rail, and the negative wire to the negative rail. Now, the LED should be blinking on and off every 5-7 seconds.