My son and I took apart a small electronic toy and were wanting to see the inside. Once we cracked it open I saw this circuit and couldn't figure out what each piece did. I think I understand the purpose of C2 (reducing noise from the motor but I'm unsure about C1 and C3. Thanks!
Note: This is my first time ever making a schematic. It is likely inaccurate.
Secondarily, when I measure voltage near the capacitors (from battery to switch) the readings seem odd. My measurements are in the low mV range and fluctuate. Why is that? EDIT: I updated the schematic based on feedback. The thought is that C1 is a PTC and my schematic was inaccurate.