Versatile AA-Cell Battery Charger

Versatile AA-Cell Battery Charger
This is the circuit design of AA-Cell battery charger that can be used to charge six AA batteries at once. An integrated circuit of LM317 voltage regulator is configured as a constant-current source. It is used to supply the 50 mA charging current to S01-S06, an array of AA-cell battery holders. Each of the battery holders is wired in series with an LED and its associated shunt resistor. (more…)

Battery Charger Powered using Single Solar Cell

Battery Charger Powered using Single Solar Cell
This is the schematic diagram of battery charger circuit that powered using single solar cell. The circuit designed using MC14011B  manufactured by ON Semiconductor. CD4093 can be used to replace MC14011B. Supply voltage range : 3.0 VDC to 18 VDC. (more…)

12Vdc mobile battery charger

12Vdc mobile battery charger
12Vdc mobile battery charger circuit diagram can delivers up to 20 V output from the 12V car power supply, allowing a constant current charging to NiCad battery unit around 18 V max. (more…)

Car Nicd Battery charger

Car Nicd Battery charger
This is a car nicd battery charger circuit that can charge any Ni-Cd battery between 4.8 and 4.4 volts from a classic 12 Volts car battery. The charging current is constant it can be selected from the values ​​of 50 to 120 mA by the selector S. (more…)

Charger for All Battery Types

Charger for All Battery Types
Note that the stability is observed when the load current and will change slightly of the supply voltage. Likewise, the fact is usually overlooked, but if you want a perfect stability - stabilize the power supply. Calculation of the current is very simple - the current in amperes is equal to 1.2 divided by the resistance R1 in Ohms. To display the current used transistor (germanium necessarily because of the low voltage opening) that allows you to visually observe