Electrical Design Engineer Wanted for Toy Debit Card Reader
Job Overview: We are in search for an Electrical Design Engineer to create a toy debit card reader for a children's board game. This debit card reader will replace the use of paper money.
Responsibilities: The design engineer will be responsible for designing and implementing a device that will add and subtract money from a debit card while also keeping a total at all times of the amount on each card. The machine must be able to keep track of 6 different debit cards. The debit cards must be made out of plastic and be the standard size of real debit/credit cards. Each card does not have to have an RFID or magnetic strip on it for individual identification, but there must be a way for the device to distinguish between the 6 different cards. The reader must also be made out of plastic and a size and wight suffice enough for children to hold and handle. The device must have a single line LCD Display that outputs numbers as well as letters. It must also have a 4x4 16 key keypad keyboard for entering data. The 16 digits will consist of the following:
* Numbers 0-9
* (+) Symbol for adding
* (-) Symbol for subtracting
* (U) letter to undo last transaction
* (C) letter to clear out screen
* (B) letter to go back one space
* (H) letter to go to home screen
When a card is inserted into the reader the following must occur:
1st: The device should display out on the LCD screen what player this card refers to, for example "Player 1" or "Player 4"
2nd: The device will then display how much money is currently on the card
Once the amount on the card is displayed on the device, the player will then have to option to add or subtract money from the card. This shall be done in the following sequence:
1st: The player will enter the amount of money they want to add or subtract form the card, this amount will display on the LCD screen as they are typing it.
2nd: The player will press the (+) key to add the money entered or the (-) key to subtract the money entered. Once either of these keys are pressed, the device will calculate the addition or subtraction and display the updated amount on the LCD screen. At this point, the player will be able to conduct more transactions.
If a player decides they want to undo the last transaction successfully completed, they should be able to press the (U) key to undo that transaction and return to the previous amount before the transaction occurred.
If a player makes a mistake while entering in a number, the (B) key shall act as a backspace and delete the last digit entered on the screen.
If a player wants to clear out an entire string of numbers they have entered and start over from the beginning, the (C) key will act as a clear and delete all numbers entered by the user and have them start with a clear screen.
The (H) key shall act as a Home key. If the H key is pressed at any time while the card is inserted into the machine, the device shall stop all processes and display the current amount on the card. At that point, the user will be able to proceed with adding or subtracting money from the account.
When a card is removed from the reader, nothing shall be displayed on the LCD screen.
The ideal designer will be able to create all the electrical and digital functionality for the device as well as the housing. He or she must also be able to create the debit cards used. A 3-D printer does not have to be used, but should make creating the plastic housing and cards relatively very easy.