Rechargeable Battery Pack Charging Circuit & USB Out
Project Description
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Project description
This circuit can power/charge a USB device with a suitable solar panel or other suitable 7-12V in power supply.
But unfortunately I have had little success in powering/charging USB devices using only the rechargeable NiMH battery pack as it does not supply the required amperage out to actually charge a USB device (the USB device might say its charging but is actually not).
Needs a more suitable USB out circuit such as a Mintyboost kit to replace the basic Ziner Diode voltage regulator.
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Component (22)
Qty
Description
CR25
R9
1
Generic standard carbon film Resistor (220Ω)
16V 1000uF
C2
1
Cap 16V 1000uF
Generic
U4
1
Back Up 6 V Battery
LM317
U1
1
LM317 / LM317T
