Do you want to save money for your personal dream project?
Let the digital coin safe keep account of your coins!
Our plan is to manufacture a coin safe that measures the amount of money put in the safe. To achieve this, we use an accurate digital scale that measures the weight of the coins and distinguishes their value according to it. The safe will also have an LCD screen that outputs the current balance of safe in euros and tells the time. The top side will have a door that is opened by a servo motor and the coin box can be removed after opening the top door. Both the LCD and the door will be operated by a pressable button. Material for the safe will most probably be acrylic.
One suggestion was to make a responsive toy that transforms voice to higher pitch, but most of us decided that it would be too annoying. Eventually we decided that the coin safe would be a suitable project.
So far, the design has of course been transforming throughout the first weeks. One of the ideas for safe functions were for example make the coin box inside be rolled out by a motor, but that was changed so that only the top will be opened by the motor. Another idea was to make the safe lever function as a real lever in a safe does: by turning the lever the locks and the door open.
Single-board microcontroller to manage the sensors and the actuators of our digital coin safe
The servomotor is used to open the safe door.
Screen used to display the time and the amount of money in the safe
Load cell used to deduce the amount of money in the same from the weight
Amplify and convert the signal from the load cell for the arduino
Used to open the safe, set time and set an amount of money
Cable for the external power supply
External power supply for the LCD screen and the servo motor
Used for the wiring of the buttons
Indicate if the door can be opened or not
Indicate if the door can be opened or not
Used for the wiring of the LEDs and the LCD screen