We will learn with this example how to draw a CPU, follow every step that is mentioned in this tutorial.
New File: Take a new document.
Rounded rectangle shape: Draw a rounded rectangle shape with "Black" by the Rounded rectangle tool (U key).
Now choose again rounded rectangle tool to draw a shape inside the shape with white color.
Effect: Go to Layer menu > Layer style > Inner shadow and use same settings.
Rectangle shape: Choose "white" color and Rectangle tool (U key) to draw a shape.
Use same step to make another.
Make a little rectangle shape with same as done up.
Draw a rectangle shape with "Black" color in the little rectangle shape.
Keep using rectangle tool make as here.
Button: Choose Ellipse tool (U key) and "7d7d7d" color to draw a circle.
Effects: Go to Layer menu > Layer style > Gradient Overlay, Bevel and Emboss and use both settings.
You will get it.
Choose ellipse tool (U key) again and "Black" color then draw a little circle as looking below.
Effect: Go to Layer menu > Layer style > Bevel and Emboss and use same settings.
Hold Alt key and scroll below your mouse, you will get another button. Now you have to change color "Black" to "Red" and set at this position.
Choose Pen tool (P key) and point with "Black" color.
This is your final result.
Recommend the tutorial