I am trying to repair a solar yard light. The (blue) LED will not turn off and so the battery discharges. The original circuit uses a QX5251 device, with what I realize now is an inductor, to drive the blue LED with the 1-1/2v battery.
My first question concerns the original circuit. Stupid me replaced the battery installing it backwards.
Could that have destroyed the QX5251 or the inductor?
Maybe all I have to do is replace the inductor? I haven’t been able to locate a non-Chinese source for the QX5251.
Then, I came across your solar rechargeable circuit and thought I would use it to replace the original circuit.
My questions now pertain to the resistors of your circuit.
Since my circuits voltage is 1.5v and yours is 4.5v do I need to decrease the resistor values proportionally?