Introduction
Sometimes while traveling you may have found dark places where there is no light. Thus, in those places, a person needs an emergency light. So, let us make an Emergency light circuit with us. Basically, an emergency light circuit is a useful circuit to learn electronics. It has multi circuits, which means it includes different other basic circuits too. For example, it uses a step-down transformer and a full bridge Rectifier made from diodes. It also regulator IC to get the regulated DC voltage. The circuit also contains some other comp. So, in this tutorial, we are going to “Emergency LED light circuit”. The circuit requires few easily available components.
Hardware Required
| S.no | Component | Value | Qty |
|---|---|---|---|
| 1. | Transformer | 500mA | 1 |
| 2. | Diode | 1N4007 | 6 |
| 3. | IC | LM7805 | 1 |
| 4. | SPDT Relay | 6v | 1 |
| 5. | Battery | 6V | 1 |
| 6. | LED | – | 6 |
| 7. | Capacitor | 1000uf, 0.1μF | 1, 1 |
| 8. | Resistor | 220Ω | 6 |
Circuit Diagram
Working Explanation
In this Emergency Light Circuit, the connected transformer first steps down the voltage to 9V which is then given to the bridge rectifier circuit that is made from the diode. The rectifier gives the DC out having some ripples which are then removed by the capacitor C1. This rectified ripple-free output is provided further to the voltage regulator IC to regulate the circuit. There is also a relay coil present. Hence, when the supply is there, the relay gets energized and the common terminal connects to the normally open contact. This makes the SLA battery charge. We wired 6 white LEDs in the circuit which together are working as an emergency light.
Application and Uses
- Street lights.
- In the mining process, etc.
