I am trying to create a system that basically pushes and releases a button using a linear actuator. The actuator receives a push/retract signal from an Android phone. The purpose of this system is for a magic trick, so the components need to be as silent as possible. These are the components I am considering (suggestions for different components are welcome).
- Arduino Uno WiFi Rev2 (7 - 12 V)
- HC-05 Bluetooth Module (3.6 - 6 V)
- DDE12-17W44M02FS (12 V direct current)
- Samsung Galaxy S8+
The Arduino will be connected to the linear actuator via standard circuit wires. The Arduino needs to be powered by some isolated source (i.e. cannot plug into wall). The Arduino will receive signals from the Android phone via bluetooth.
How it will work:
- Actuator is placed into light contact with a button (the button is not pressed).
- A signal is sent from the phone to the actuator to press and hold the button for a certain amount of time.
- After the amount of time has passed, the actuator must QUICKLY retract.
- This will be repeated around 10-20 times based on a signal from the phone.
- How can I power the Arduino without plugging it into a wall? I did some research and it is possible to user a battery to power it as long as the connection is secure, the voltage is steady, and the voltage is between the recommended input voltage. For this Arduino board, the input voltage is 7 - 12 V. Is this as simple as following what I read and using a 9V battery or do I need to take the actuator's voltage requirements into consideration? If the latter, what would I need to do differently?
- Is it possible/easier to power the Arduino by connecting it to a second Android phone via USB? This phone will essentially be a brick - it will serve no purpose other than to be a power source.
- The Arduino and the actuator will be in a tight space surrounded by plastic walls on all sides. The plastic is the same as the plastic used to make soda cups at fast food places (i.e. McDonald's). Do I need to add a way to cool this system? If so, how does that change the voltage/current requirements of the power source?