I am building a pinball machine run on Arduino and am trying to figure out how to send a message to the Arduino with a touch sensor; Which touch sensors do you reccomend? How do you use them? Do you have any sensors which are like tape (You can wrap them around a round bumper and stick it on)
Hi!
I am not sure what you want to do exactly, but you might be interested in the Adafruit capacitive touch.
Adafruit 12 x Capacitive Touch Shield for Arduino - MPR121 : ID 2024 : $12.50 : Adafruit Industries, Unique & fun DIY electronics and kits or the Arduino | Adafruit MPR121 12-Key Capacitive Touch Sensor Breakout Tutorial | Adafruit Learning System
If you don't want to go with another board, you can get yourself some piezo microphones or make the sensors with anything that is conductive (aluminium foil, etc).
In regards to sending messages to the Arduino, I have only worked with max msp,( sent messages from Arduino to Max in order to receive a message result). It works vice versa too but I haven't done it.
Check maxuino and Arduino2max though.
Good luck!
Myrto 
Capacitive sensors can come in any shape you like.
FSR sensors are often tape, and may be bendable.
There may be other options - it depends a.o. on the final application and sensitivity required.
myrto:
Hi!I am not sure what you want to do exactly, but you might be interested in the Adafruit capacitive touch.
Adafruit 12 x Capacitive Touch Shield for Arduino - MPR121 : ID 2024 : $12.50 : Adafruit Industries, Unique & fun DIY electronics and kits or the Arduino | Adafruit MPR121 12-Key Capacitive Touch Sensor Breakout Tutorial | Adafruit Learning SystemIf you don't want to go with another board, you can get yourself some piezo microphones or make the sensors with anything that is conductive (aluminium foil, etc).
In regards to sending messages to the Arduino, I have only worked with max msp,( sent messages from Arduino to Max in order to receive a message result). It works vice versa too but I haven't done it.
Check maxuino and Arduino2max though.Good luck!
Myrto
Would this work as well: Adafruit 12-Key Capacitive Touch Sensor Breakout - MPR121 [STEMMA QT] : ID 1982 : $7.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Also do both of them work on anything touching the conductor or is is only human touch or does it sense anything but air?
These things sense anything that's conductive and grounded (or having enough capacitance of itself to appear grounded).
So would a metal ball work?
It works yes, both boards are MPR 121s, which means they behave as touch sensors. The link I sent you gives info on how to wire the board. You can attach literally anything conductive, from fruits to spoons, metal balls should work too.
As long as the metal ball itself is grounded, it should work.
wvmarle:
As long as the metal ball itself is grounded, it should work.
What do you mean if the metal ball is grounded?
Connected to ground. Just an isolated ball isn't going to do much good.
Do you mean the ground wire?
Yes - something like that. A person attached to it works as well. Anything that has sufficient capacitance.
Do look up how a capacitive touch sensor really works!
Ok thank-you all for your help 