hspalm

What an awsome little thing!

What an awsome little thing! I am truly amazed at it’s simplicity, size, and functionality. The rubber band solution is really a clever solution, and an easy way to do gear ratios on the cheap. Good job!

lumi

Very minimal and very

Very minimal and very interesting construction.

I am curious how you keep the rubber band on the wheels…guess it will slip off when the bot turns…

1 reply

crazyrabbit

Creative #1

 Works bretty good with no brain. Can’t get much smaller for home made for sure.

1 reply

robotfreak

Thank you guys. In the

Thank you guys. In the beginning I was sceptical about the rubber band solution, but it works pretty well. As long as the motors and the axis were in parallel. OK, the rubber bands don’t last long, you have to replace it a lot.

britannicus

**Inspired !! - Less is truly more **

Great little machine this - just goes to show what you can do with very little

korel

Nice little bot,and I like

Nice little bot,and I like the bearings and rubber band coupling :)  Aren’t you using diodes to protect your transistors?

2 replies

robotfreak

Good point, Korel. I will

Good point, Korel. I will add some flyback diodes soon.

1 reply

korel

I’m learning too my friend

I’m learning too my friend

spurt

You can get it smaller,

You can get it smaller, please look there: http://spurt.pbworks.com/Simpelmobil

spurt

Flat belts do not slip off

You can prove it by physics that flat belts dont slip of. Years ago the were used very widely: https://secure.wikimedia.org/wikipedia/en/wiki/Belt_(mechanical)

Physics tells that flat belts have the tendency to climb to the highest point of the pulley; wikipedia says: “Because flat belts tend to climb towards the higher side of the pulley, pulleys were made with a slightly convex or “crowned” surface (rather than flat) to keep the belts centered.” Indeed the bearings are flat, but a belt at the edge would “try to slip back”.