An absolute newbie here with ZERO experience in electronics and need your help.
I am building an art installation which gets activated with a PIR; which starts a 200rmp 12v DC motor (pulling up a 4 meter light weight cotton fabric and LEDs) for 3 seconds; stops for 5 seconds, and then reverses for 3 seconds (going back to starting point). and then Loops everytime PIR gets activated.
Now, I understand I need a TIP120 Darlington transistor, 1UF capacitor, 12v SPDT Relay, external battery. Do I also need a H-bridge or should I get a shield or would the relay be sufficient?
Also, there are 4 different points (4 different DC motors, PIRs and LEDs) where this placed; so I am keeping 4 separate boards. How do I connect them together to same battery system?
How do I assemble this? I understood the PIR circuit and the DC motor circuit from tutorials, but the above things, relays and H-bridge and the reverse bit are confusing me.