Project – Solar USB battery charger
Requirement Charge USB devices by the sun Capture energy during the day even if target device is not plugged in Materials Switching Regulator $4 Solar panel $70 (1/3 of $200) - had…
Requirement Charge USB devices by the sun Capture energy during the day even if target device is not plugged in Materials Switching Regulator $4 Solar panel $70 (1/3 of $200) - had…