I looked around and find a few things which helped my project but not until completion. I hope you can help me ! I’m totally clueless about all of this.
Project
Wooden box attached to the ceiling filled with ping pong balls (up to 10 max).
Box opens as shown on image attached (exploded view):
blue arrow = rectangular side door below blue arrow lifted up (type of rail will be added),
red arrow = direction of the ping pong balls falling.
At some point I might put confetti which won’t fall as easily as ping pong balls.
Box opens thanks to servo activated remotely (50 m radius).
Hoping the project to be as minimalist as possible so:
transmitter = simple switch with battery (see link below - similar to car keys really),
receiver = signal received activates an Arduino coded to interpret as follow:
-- Press A switch = servo rotates 180 degrees anti-clockwise.
-- Press B switch = servo rotates 180 degrees clockwise.
I saw projects like this
Transmitter side : Arduino + transmitter + breadboard+ wires + power/battery
Receiver side : Arduino + receiver + servo + breadboard+ wires + power/battery
But do I really need 2 Arduino ? I don’t need anything complicated.
I won't be able to see the box so pressing A should complete the full +180 degrees rotation and pressing B the opposite.
Items needed (sorry I can only put 2 hyperlinks max)
Ping Pong balls and I know nothing about servos but in case in the future I wanted to put confetti or candies (etc.) I wanted a servo with a metallic arm (not sure it's called an arm).
Thanks. So is the " DC 12V 1CH Relay Receiver Module RF Transmitter 433Mhz Wireless Remote Control Switch 12V Single-channel Wireless Remote Control Switch" (see first link in description) that has a transmitter and a receiver is sufficient?
The only thing is how can I tell the servo to rotate to a specific point and stop.
I won't be able to see what I'm doing as I'll be in another room. The press of switch A must open fully (180 degrees) and the B switch to close fully.
I see thanks! So much more expensive though.
I really thought it would be possible to simply send a signal that activate an Arduino coded to rotate the servo to +180 degrees and rotate it to -180 degrees simply by the pressing two different button. I was hoping the transmitter to be as minimalist as possible. A simple switch with battery.
Remote control ("garage door" or similar) transmitter/ receiver pairs are readily available as are cheap servo tester modules. You hack the latter to set two servo positions according to the relay from the remote control.
To make it so the servo is only subject to minimal load, one can use (as we used to with rc glider towing etc) have the lid secured by a metal tongue with a slot cut into it slipping over a mating plate. The mating plate has a cross hole drilled into which fits a release pin connected to the servo.
That way, all the servo has to do is pull the pin.
You could get by with only one servo tester if you use the remote relay to power the tester when required to drop. The servo tester would have it's pot set for the required travel.
Just in case my drawing was misleading (I could only post 1 pic as a newbie): the side door below the blue arrow is being lifted up by the servo (that's why I took a powerful servo with metal part). I'm simply hoping that gravity will keep it shut.
Your technical explanation is really well done but maybe well above what I need for my basic simple design.
To be fair, my drawing on Sketchup isn't really self explanatory
I'll edit the door movement as it can easily be understood as the door being the top part. Sorry!
