Let's Make Robots!

mini robotic arm

moving a little bolt from one side to the other side

After having some ice cream I got the idea for this robotic arm.



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so simple and yet so cool

I like how u have used a control to be able to control the arm yourself. Remote control would  be pretty cool as well

I like how u have used a control to be able to control the arm yourself. Remote control would  be pretty cool as well

can you post some details and pictures about your robot ? please.


complete "teach in" system (mini robot, teach-in-arm with four potis, controller board with the PIC16F690)


total length of 140mm (5,5 inch)


the gripper:


the gripper servo:


That's all !

I like it a lot... It's small, simple, fast, and it looks easy to build...Oh gosh I need more time to work on my projects... :(

hi! can you send to me the source code of this project and the list of materials? i would like to make this as our project. thanks so much! my email add is stephen_baesa@yahoo.com.. tnx

I would like to make this soon.  It would be really nice if you could email me the list of materials to make the arm and the teach system.  Thanks, that would be great.  Email me at doggy1199@yahoo.com  Thanks

hi.. this project is great.. could you please help me with this?

Hi Stephen,

sorry for the late answer. but I was not here for a longer time.

And there were also a lot of other "problems" which had to be solved using my PIC Controllers.

i.e. self made electronics for a RC-Excavator which works similar to the digital system used in slot cars. To replace a lot of wires between the rotating part of the excavator and the track unit, a small PIC 12F629 reads the pulses from up to 5 channels of a RC-Receiver and leads their information via a 2 wire connection to a second PIC12F629. At the second board the power is seperated from the data. The PIC is reading the data, and generates the PWM output for the 5 Servo output connctors. the 2 wire connection is made with a cheap 6,3mm mono microphone plug which is also used as the axle for the rotating part.

The arm of the excavator is also powered by standard servos and so it was necessary to change the control behavior from proportional to integral so that the servos move like real hydraulic cylinders which are controlled by valves.

I used the same 12F629 type for that job and added some features like adjustable limit positions and starting point programmable by one jumper, and automatic return to park position when missing the pulses for some seconds.

But back to the mini robot. I will try to contact you by mail for more help with that project.

Now the clock shows 1.05am at my location (Germany). Time to leave


Greetings Stoerpeak