Battery chargers circuits and projects

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This 12 Volt Battery Auto Charger circuit will quickly and easily charge most any lead acid battery. When the battery is fully charged, the circuit Relay switches off and lights a LED.
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Here is the low cost universal charger circuit diagram for NiCD – NiMH batteries. This battery charger circuit is ideal for car use. It has ability to transform a mains adapter in to a charger . This one can be used to charge cellular phone, toys, portables, video batteries, MP3 players, … and has selectable charge current. An LED is located in circuit to indicate charging. Can be built on a general purpose PCB or a veroboard.
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lt3650The LT3650 circuit is a monolithic two-cell Li-Ion/ Polymer battery charger that operates from 9V to 32V input voltage range (11.5V minimum start-up voltage). The LT3650 si produced by Linear Technology and provides a constant-current/constant-voltage charge characteristic, with maximum charge current externally programmable up to 2A, set using an external current sense resistor. continue reading…