Traffic Lights controller
In this project we are going to make a very simple traffic light controller circuit even an early age electronic student can make it very easily. We have used three transistors with necessary composts to complete the project of traffic sign.
Components Required for Traffic Lights Controller
- Transistor BC547 or equivalent
- 100k resistors
- 33k resistors
- 470uf capacitors
- 100uf capacitors
- Green, RED and yellow LEDs
- 9v battery
These components can be used for these Both projects
Circuit Diagram of 3 LEDs chaser with transistors
You can change time interval with change in capacitors. More power capacitor decrease speed of chasing and less power capacitor increases the speeds. You can also connect variable resistor on the place of 100 k resistor to adjust the time interval as want.
The given animated GIF file shows the signals light are glowing with same time interval, but we have to change the time interval of these lights.
Circuit Diagram for Traffic Lights Controller
As we have already mentioned that the time interval of these LEDs can be adjusted as you want. This circuit diagram shows how can you change this circuit as traffic lights signals. We can change the time interval among these three LEDs by using two methods.
- Change in Resistor
- With change in capacitor
You can change the time interval among these three LEDs if you change the value of resistor. Increase in resistor value will increase the time interval of corresponding Light and with the decrease in the resistor value will decrease the interval.
Note: Time interval can be adjusted according to yous desire if you use potentiometer (variable resistance) instead of fixed resistors. So in this way you can build very efficient Traffic lights signals regulator very easy.