Ok, since i publish the first part i left an alfa test on a protoboard.
Netx to this test I added some new features such as:
-EEPROM saved last step Config
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Step 1: The New Hardware
On the display you can see:
Actual distance: When you press the radar button
Steps calculated: When you press the radar button
Size of steps: When you press the add button, if you reach the 100 cm, it restart to 5cm
Step 2: The New Program
Step 3: Next Step
The next Step is to put it on a generic board whit jumper cables.
Step 4: The 3D Print and Gerber Files
I soon will provide you whit a video test of this step and a 3d printed box, the eagle files and grebers too!