I am doing a project where i am using an umbrella to convert: 1. Solar energy fr

Question

I am doing a project where i am using an umbrella to convert:

1. Solar energy from the sun into electrical energy using solar cells

2. Energy from rain into electrical energy using piezoelectric transducer

This electrical energy will be used to charge a rechargeable battery and eventually charge a mobile device.

Below is a schematic circuit diagram

All the components are connected in parallel because the piezo and the solar cells need to work independently.

The thing is that when i tested each individually with a capacitor across its ends, they both work. (The voltage across the capacitor increases and stays the same if not discharged)

But when i connect the solar cells in parallel with the piezo disks after the bridge rectifier, it does not seem to work. (the voltage does increase across the capacitor but decreases rapidly when it is not being discharged). I even tried a adding a diode after the positive of the bridge rectifier going to the solar cells.

Can i please have some help on how i can make it work, where the charge is stored. (so i can charge a echargeable battery and eventually charge a mobile device)

Explanation / Answer

Better to put a toggle switch to enable any one of the single I/p Or u can prepare circuit with LDR to enable solar I/p Both can't work simultaneously in a parallel circuit because the resistance of the circuit decreases in parallel connection If one is on other is off then current from the on input divided to other input as well as output Hence better to prepare circuit with toggle switch or LDR and also u can use transister

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