Let's Make Robots!
In my current project I have a rotary switch as a sort of menu selector. Read more
This Tip/Walkthrough shows you how to make :- "Glow in the Dark" PolyMorph This stuff is real fun to play with and it infects the whole family. First get some … Read more

Coaxial helis

I sorta got into "flying" robots recently and I have found answers concerning most of my questions, but there is a particular thing I don't understand about helicopters; how do the coaxial system work (I mean, how can I make one from scratch). I understand that each rotor cancels the other's torque, but how does all this mechanicaly work? Are the rotors dependant on each other for speed (I suppose that's not true because the heli turns probably by increasing torque generated by one rotor and decreasing torque on the other).

Do whatever you want to add on.
For using this track with timing belt as same way as I did, the robot must be under 30 pounds (As light as possible). It will be very difficult to make turn because … Read more


i serche for teacher teach me robotics pls

Path Movement Underwater, Autonomously maintains a stable position in the water.
Using a
The aim of the project was to design and build an underwater vehicle with an emphasis on stability such that it may possible to perform light well intervention. … Read more
Produces very high voltages
So here is a little toy I recently made. I was inspired by Plasmana on www.instructables.com. I followed/modified his instructions to make a Marx Generator power by … Read more
Hi all, Phoenix is almost ready for prime time, mechanics almost done aside for e few things here and there. Some pictures … Read more
I was inspired by Chuck McManis and his BJT-based H-bridge tutorial and I wanted to build a similar H-bridge based on MOSFETs. The design goal was for the H-bridge … Read more
Detects any metal at a short range
Metal proximity dectors can be very useful in robotics (contactless switch, assorting of metal and non-metal parts, etc.). The figure below shows a simple circuit, … Read more