Door popper componants

Projects General Guidance
1

Hi all,

Newbie question here, but been researching and getting confused with all the different variations of devices.

I want to buy a kit similar to this: http://www.ultimatecarparts.co.uk/boot-popper-kit

And replace the button that activates the solenoid to be NFC controlled. So I would have a key fob that placed near the boot would open it. I'm competent at programming in various languages, but haven't ventured into the realms of electronics.

So I'm wondering what components I would need to make this happen? and/or if anyone has some good starter guides.

I've seen: Adafruit PN532 NFC/RFID Controller Shield for Arduino + Extras : ID 789 : $39.95 : Adafruit Industries, Unique & fun DIY electronics and kits which appears to handle the NFC, but I guess I need to connect this to something else that would activate the solenoid?

Cheers,

M

2

A relay is all that is needed to to activate the solenoid.
you need one that can handle 12 volts and however many amps the solenoid draws.(doesn't say in that ad)
most I have installed needed between 30 -80 amp relays. My guess is that one would be fine with a 30 amp relay.

Also I highly recommend using a opto-isolator so you dont have to worry about it backfeeding voltage spikes to your arduino . you can buy relays with them built in.

Since I work in a custom auto shop I have installed many of these poppers. if your using that one for a boot lid it will be fine but if you are wanting to do your doors you will need at least a 35 lb. solenoid.

Hope this helps,
Les
EDIT:
with a quick search I was unable to find one that had a built in isolator and could handle enough amps so you may have to handle that separately

3

ubergam3r:
I've seen: Adafruit PN532 NFC/RFID Controller Shield for Arduino + Extras : ID 789 : Adafruit Industries, Unique & fun DIY electronics and kits which appears to handle the NFC, but I guess I need to connect this to something else that would activate the solenoid?

You need the Arduino (probably UNO). You can drive the solenoid with a relay module that includes a transistor driver with or a logic-level power MOSFET like the IRL540N. The relay can switch the + side or the - (ground) side of the solenoid. The MOSFET has to go between the solenoid and Ground.

4

here in the States we call a boot a trunk.