iPOD – MP3 Player Charger by MC34063
Portable iPod charger that you can use while away from your computer. The circuit is based around an MC34063 switchmode regulator. This has high efficiency so that there is very little heat produced inside the box, even when delivering its maximum output current. The circuit is more complicated than if we used a 7805 3-terminal regulator but since the input voltage could be 15V DC or more, the voltage dissipation in such a regulator could be 5W or more at 500mA. and 5W is far too much for a 7805, even with quite a large heatsink.
Read More Source:http://electronics-diy.com/electronic_schematic.php?id=139
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MC34063A the inverting converter
The inverting converter is the power unit to make the negative output voltage with the positive input voltage. The converter which was made this time makes -2V to -10V output voltage with the input voltage of +12V. Because it makes the limitation value of the input electric current about 1.3A, the maximum with the input electric power is about 16W.
Read More Source:http://www.hobby-elec.org/e_ckt234.htm
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The circuit is a good battery. It is Control Volttage regulator Output 12V 1.5A , Input Voltage battery 5V-13V Only.
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