So I started hacking a toy RC car apart.
I ran across two things here I don't understand:
The motor (looks like a 6V motor) has a capacitor between the two ends. Why is there here?
The current comes in from a regular set of AA batteries. I'm assuming it won't cause any harm if I leave them there when I plan to control the motor from my own L293D hooked into an arduino? It looks like this:
There's a piece of wire coming out of the main PCB (soldered at a point). It goesinto the plastic of the car and it's soldered to a golden piece of foil.
I've never seen anything like this! Would this serve any purpose? It Isn't connected to anything.
As a side note, the car does allow me to put AA batteries and then stick a charger (with a barrel jack) into it to charge the batteries.
This looks like this: