There are few steps to make AFM. 

• First make nanometer size tip ✅
• Power supply ✅
• Make it vibrate up and down ✅
• Measure the force of vibration/input ✅
• Coarse XYZ movement of sample ✅
• Fine XYZ movement of AFM tip - electrical part ✅
• Fine XYZ movement of AFM tip - mechanical part ✅
• Convert breadboard to PCBs ✅ 
• Connect everything together for first image

(Probably there are more steps, we will uncover them as project continues)

XY movement has a very good explanation in Lego2Nano with electric schematic and software algorithms. 

For force measure we will use Quartz fork instead of laser one. For two main reasons, first QTF is easy to fabricate at home for a few dollars. Second it eliminate the need for complex laser adjust mechanism and it's electronics.