6v / 12v Led emergency light board price list

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 This very simple and reliable emergency light board that can be made  with locally available components. 

It Works with 6v / 12v battery and solar panels.

Battery charging is Automatic and maintenance free 

You can also make Educational Projects for school and college. 

Mains Power is applied via 0 - 9 / 0-12 volts transformer, it is rectified via D1,D2,D3,D4 Diodes and given to LM317 voltage regulator. 

The output Voltage of LM317 is set between 7.2 volts to 7.5 volts via RV1. 

6 volts Battery is charged by this voltage through D5 and R4. 

When the Battery Voltage reaches 6.8 volts, zener D6 turns on transistor Q1, cutting off LM317 and stopping charging current.

When mains power fails transistor Q2 turns on the LED's. 

After mains power was restored, Q2 is turned of via R1 and charging cycle begins.

Click Here for 6v Circuit diagram and List of Components

Transformer  - 0 - 9 / 0 -12 volts 500 mA

Battery  - 6 volts  Rechargeable

LED's - any combination of LED's 1A Max Current. 

Mains Power is applied via 0 - 12 / 0-15 volts transformer, it is rectified via D1,D2,D3,D4 Diodes and given to LM317 voltage regulator. 

The output Voltage of LM317 is set between 15.5 volts to 16.5 volts via RV1. 

6 volts Battery is charged by this voltage through D5 and R4. 

When the Battery Voltage reaches 15 volts, zener D6 turns on transistor Q1, cutting off LM317 and stopping charging current.

When mains power fails transistor Q2 turns on the LED's. 

After mains power comes back, Q2 is turned of via R1 and charging cycle begins.

Click Here for 12v Circuit diagram and List of Components

Transformer  - 0 - 12 / 0 -15 volts 500 mA

Battery  - 12 volts  Rechargeable

LED's - any combination of LED's 1A Max Current. 

PCB Size - 88 mm x 40 mm ( 3.5 inch x 1.5 inch ), 

PCB Thickness = 1.6 mm

Copper Thickness = 35µm

Standard  Glass Epoxy FR4 Grade A  PCB Board