Am currently working the geometry bot. Only thing it can do is go in squares. And with a change in resistor i starts moving in triangles or any polygon with equal sides. It does not work on any microcontrollers. It uses 2 555 timers and a L293d to drive the motors according to the output. The circuit works as planned but I am not able to find proper wheels for the motors. All types of caps i tried just used to slip off. Can any one name a few sites i would be able to get wheels for ungeared DC motors? Cash on delivery would be good!
Nice idea but i did not quite get it. Please tell us more about the project and upload some video that we can see how it works. I like the approach with that standard components
I like it because it uses no microcontroller and the picture looks so familiar to me. I mean, the bread board and all. This is what I have guessed about the working mechanism.-"The robot once moves straight and then takes turn, again staraight and again takes turn and it goes on. The 555 timers control the duration of moving straight (thereby controlling the length of eah side and size of polygon) and duration of taking turn (thereby controlling the angle between two sides and the number of sides)."
Let me know if my guess is right. Please put up circuit description and videos.
For wheels, you may make some pin holes in a bottle cap. Also, make a centre hole of the size of the shaft’s diameter. Take steel wire (the kind used for fencing, it is a atrong and flexible wire) and secure it to the armature. Then pass the left over wire through the holes in the cap so that the shaft and cap are fixed together. I can’t guarantee that it will work. You may try M-seal.
As Duane Degn said, I believe it is better to use gears with robots unless they are very small. You can buy two cheap four wheel drive toy tanks that simply move straight. Then, open them up and use one of the gear box and wheel assembly for left wheels of your robot and the other for right wheels. This way you can solve the problem of wheels, torque and cost.
timer controls how much time the right wheel turns and another timer is to control the first timer’s time! the other motor continues on and on and never stops so when the right one stops the bot moves right!
i will upload the schematics as soon as i find a solution for a small problem.
Hello everybody! I got geared motors and they work well with the circuit. The prototype also worked well. As soon as I get a permanent platform to mount the components properly I will be uploading the videos and the schematics… Thanks for the help everyone.
For the wheels issue before I would suggste to use some bottle caps. The main problem is that the motor shaft is not sticking in the thin material of the cap very well. To improve that you could put something in the bottle cap and hotglue it there to give the shaft more grip. then drill a hole into that and make sure the hole is .5mm smaller than the motor shaft.
