January 10, 2025
For some reason I cannot stop creating applications for the Cheap Yellow Display (CYD). I have no idea if this calculator would be of any use to anyone but it was fun to development. The other CYD applications I have created are a GPS and a Bluetooth MP3 music player.
For some reason I cannot stop creating applications for the Cheap Yellow Display (CYD). I have no idea if this calculator would be of any use to anyone but it was fun to development. The other CYD applications I have created are a GPS and a Bluetooth MP3 music player.
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|
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This is the main calculator
screen. The functions of each key is described below. |
Key Definitions and Functions
| Key
Marking |
Key Meaning |
Description |
| SR |
Square Root |
Takes the square root of the number on
the top of the stack |
| T^X |
10 to the X power |
Raises 10 to the number on the top of the
stack |
| Y^X |
Y to the X power |
Raises the the number second on the stack
to the number on the top of the stack |
| CHS |
Change Sign |
This key has 2 uses. 1) If inputting a
number in scientific notation it controls the sign of
the exponent entered. 2) Changes the sign of the number
on the top of the stack. |
| SIN |
SIN |
Returns the sin of the number of radians
on the top of the stack. |
| COS |
COS |
Returns the cos of the number of radians on the top of the stack. |
| TAN |
TAN |
Returns the tan of the number of radians on the top of the stack. |
| EEX |
Changes numeric input to scientific
notation |
|
| D>R |
Degrees to Radians |
Converts the number of degrees on the top
of the stack to radians |
| R>D |
Radians to Degrees |
Converts the number of radians on the top of the stack to degrees |
| FIX |
FIX Decimal Places |
When this key is pressed
the next numbered key sets the number of decimal places
used for numeric display |
| SWP |
Swap Stack Entries |
Swaps the top 2 stack
entries |
| M>I |
MM to Inches |
Converts the number of
millimeters on the top of the stack to inches |
| I>M |
Inches to MM |
Converts the number of inches on the top of the stack to millimeters |
| CLR |
Clear |
Clears the stack and then
pushes 0.0 onto the stack |
| ENT |
Enter |
Pushes the number being
input onto the stack |
| / |
Divide |
Divide the number second
on the stack by the number on the top of the stack |
| * |
Multiply |
Multiply the top 2 numbers
on the stack |
| - |
Subtract |
Subtract the number second on the stack from the number on the top of the stack |
| + |
Addition |
Add the top 2 numbers on
the stack |
| . |
Decimal Point |
Adds a decimal point into
the number being input |
| BS |
Back Space |
Erases the last numeric
digit entered |
| 0 .. 9 |
Number Keys |
Adds the key's value into the number
being input |
Further information and Arduino code for this project available here.
Questions and comments to me Craig at: calhjh@gmail.com