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This is a solar energy charger and have a PNP 2N5401 transistor
can anyone explain to me about how this circuit can work ? and the LED can light up when battery is implement.
https://www.onsemi.com/pub_link/Collateral/2N5401-D.PDF
Actually, after pass through the LM317T, the output for LED1 around 2.5V, but after assembly the battery, the voltage across LED1 become 0, and the open circuit part of battery is around 3.5V...
one NiMH 1.2V cannot light up the LED1, i think that is due to insufficient current. but with two 1.2VNimh battery can light up.
So, how can i adjust the resistance value in order to light up the LED1, or how to increase current in the LED 1 way when i plug in one NImh battery?
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In your opinion, what is the resistance's value should i put ?
actually this circuit is from following website: http://www.next.gr/circuits/float-charger-for-nimh-cells-l36200.html
I need to design a solar energy source charger. It is around 5V input to charge 4 sets 1.3V AA Ni-mh 1100 mAh
Flash-charger, which has a single LED on when charging and when it reaches full, it will pause until the terminal voltage of the cell has dropped a little and then charge to the limit...
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