I just bought a very small aerator called "Metal Marine Bubble Box" that runs off a small DC motor. Not much torque needed. I tried reading the print on it and all I could read was 1.5v. This makes sense since it takes 2 D batteries which are 1.5v. With both batteries can run for 40 hours, but it can also run on 1 D battery for 20 hours. I know a D battery's current is about 25mA. I want to eliminate batteries.
I want to build a solar cell/panel that can run it instead of using batteries, or that also will charge the batteries while running it, or something like that.
I've seen someone create a small fan from a dollar tree/store solar garden light but couldn't tell exactly how they did it.
What do I need to build it (diodes, resistors, etc.)? I'm a noob and know nothing about circuits, voltage, current needed to run this tiny motor. I'm wondering if I have to perfectly match the voltage/current.