It Is Easy To Do ....
This instructable will go step by step and teach you how to make it.
This step usually comes at the end but I think its better to start with it. Lets dive in! Materials:
-Raspberry Pi (http://www.ebay.in/itm/like/191327811855?aff_source=Sok-Goog)
-Aluminium Rod (Required Machines To Cut The Rod)
-IC L293d (8x8) (http://www.ebay.in/itm/like/231440355796?aff_source=Sok-Goog)
-And Required Items...
Step 1: Haptic Robotic Finger Using Raspberry Pi
Step 2: Structure of Robotic Finger
Step 3: Milling
Step 4: After Milling
Step 5: Semi Completed Finger
Step 6: Complete Finger With (six Degrees of Freedom)
Step 7: Connection of Raspberry Pi and IC L293d Board
First pin of raspberry pi is 3+
Second pin of raspberry pi is 5+
Sixth pin of raspberry pi is Ground
And then connect GPIO of Pi and IC (By Your Program)
Step 8: Connection of Stepper Motor With L293d
Step 9: Flex Sensor
Connect Flex Sensor with raspberry pi by your coding logic.
I connect Flex sensor with raspberry pi directy (without PWM)
Step 10: Working
Step 11: Conclusion
It is working...
You can do this project within a day...