dear friends,
I need to charge lead battery in a way that when a really discharged battery, 10.8 volt for example, is connected to charger, no high flow of current must flow.
I need to limit current at 500mA.
Any idea?
Thanks
The circuit at that site is a constant current one, and is not, therefore, suitable for charging lead-acid batteries - which should be charged from a constant voltage source.
You need a constant voltage regulator with a current limit such as this. You want to adjust the output voltage to about 14V (R4≈2.4kΩ) and for that you need an input voltage of at least 16V. The transistor base-emitter resistor of 1.4Ω shown should give you a limit of about 0.5A.
dear friends,
I need to charge lead battery in a way that when a really discharged battery, 10.8 volt for example, is connected to charger, no high flow of current must flow.
I need to limit current at 500mA.
Any idea?
Thanks