Battery Protector for Emergency Lamp


Emergency lamps do not have a facility to prevent the deep discharge of battery if the lamp remains on during day time. The fluorescent lamp filament also damages if it is glowing in low battery voltage. This causes blackening of the filament side that indicates the damaged filament. So we have to switch off the lamp in the morning and switch it on again in the evening. By adding this circuit in the emergency lamp, you can reduce the job of daily switching. This circuit offers two advantages

1. It prevents unnecessary discharge of battery during daytime
2. It charges the battery only during night. This save energy and prevents overcharging of the battery.

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Battery Protector for Emergency Lamp.Utility Circuits 1


Emergency lamps do not have a facility to prevent the deep discharge of battery if the lamp remains on during day time. The fluorescent lamp filament also damages if it is glowing in low battery voltage. This causes blackening of the filament side that indicates the damaged filament. So we have to switch off the lamp in the morning and switch it on again in the evening. By adding this circuit in the emergency lamp, you can reduce the job of daily switching. This circuit offers two advantages

1. It prevents unnecessary discharge of battery during daytime
2. It charges the battery only during night. This save energy and prevents overcharging of the battery.

Continue reading “Battery Protector for Emergency Lamp.Utility Circuits 1”

High Current Charger with Cut Off. Utility Gadgets.7


Many of my readers require a High current battery charger with battery protection facility. So I am posting this circuit for charging 12 volt Lead Acid battery using Mains power. The same circuit can be connected to Solar panel also. The circuit has features like
1. High current charging
2. Voltage regulation
3. Current regulation
4. Full charge cut off
5. Battery protection
6. LED status indicators

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Battery Guard


One of the major problems in Battery operated devices such as Emergency Lamp is the deep discharge of battery when the load operates for long time. If the Lamp remains on for long time, battery voltage reduces drastically and destroys the fluorescent lamp .The blackening of the ends of fluorescent tube is due to the  heating up of filament in low voltage. Deep discharge also reduces the battery life. As a rule 80% current should be present in the battery for normal battery charge / discharge cycles. This add on circuit is meant for battery protection which  never permits the battery to go below 4.5 V / 10.5 V and automatically shut off the emergency lamp.

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Battery Protector for Emergency Lamp


Emergency lamps do not have a facility to prevent the deep discharge of battery if the lamp remains on during day time. The fluorescent lamp filament also damages if it is glowing in low battery voltage. This causes blackening of the filament side that indicates the damaged filament. So we have to switch off the lamp in the morning and switch it on again in the evening. By adding this circuit in the emergency lamp, you can reduce the job of daily switching. This circuit offers two advantages

1. It prevents unnecessary discharge of battery during daytime
2. It charges the battery only during night. This save energy and prevents overcharging of the battery.

Continue reading “Battery Protector for Emergency Lamp”