the solar panel costs US$0.60 each, Peak Voltage (Vmp):3.5V, Open Circuit Voltage (Voc): 3.5V-4.0V, Peak Current (Imp):45mA, Short Circuit current (Isc):45mA-48.5mA.
the battery cost more, US$4.50 for Li-Po battery pack. but i might just use Li-ion which cost about US$0.67 per pack.
anyway, i have fix the schematic diagram since the other terminal of the sensor was not indicated.
i want to have another factory fabricate the pcb and need to remove the sensor function. can please help me?