Hello, I have a small solar panel that is connected to a 2200 uF capacitor through a diode and charges it to 1.7V maximum. I would like to create a circuit that will use the voltage across capacitor terminals as a trigger for other events. Suppose that when the capacitor is charged to exactly 1.7V, it triggers some other element and discharges through an LED. Is it possible to build such circuit without any other voltage sources except for the solar panel? Thanks.