Voltage controlled switch for solar charger

[Elex-factor]

I need to make a circuit working between 1 V and 2.4 V. I want to make a solar charger that charges a capacitor C2 until it reaches 2.4 V, once the voltage reach 2.4 V, the switch is closed and the led lits up. At the time, 1st capacitor is discharging, I want to charge another capacitor C3. When the 1st capacitor discharges to 1 V, then I want to charge the 1st capacitor again and connect the load to 2nd capacitor. I tried to make a circuit diagram but I am not sure about it. Please help me with this..I'll be very thankful to you.

 

[kanni1303]

Transistor is current controlled current source...
Op AMP is Voltage controlled Voltage Source...

so must move on to comparator such like lm319...
may this help

**broken link removed**
Voltage controlled switch-2