Imperial Special PCB Design
![Imperial Special PCB Design](Imperial%20Special%20Calculator%20PCB/Imperial%20Special%20Calculator%20PCB.gif)
Here is a photograph of the IMPERIAL SPECIAL printed circuit board (PCB), and the components involved in the dc-dc power supply circuitry. It is a very simple circuit because the main IC has built-in display driver circuitry.
Track Side
![Track Side](Imperial%20Special%20Calculator%20PCB/Imperial%20Special%20Calculator%20PCB%20Track%20Side.jpg)
This photograph shows the artwork and etching of the PCB. I thought it was designed well considering how old this calculator is.
This Article Continues...
![IMPERIAL SPECIAL](Imperial%20Special%20Calculator.gif)
Imperial Special Calculator
Inside Imperial Special Calculator
Imperial Special PCB Design
Sharp LI2006 Voltage Levels
Imperial Special Calculator Display
Imperial Special Calculator Battery
Imperial Special Calculator Case