two power supply management control board

[eslam_reda]

i want to do control system to charge battery from solar cell at day then on night the charged battery light load
the battery :12V. 7A
the solar cell : 15-17V 0.5A 8watt
the load is microcontroller 89s52 flashing 150 LED
please i need the solution

 

[karesz]

Hi,
a possibility (I thin, linked to first from Keith):
h**p://ludens.cl/Electron/solarreg/Solar~1
K.