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Two Dumb Questions; TX/RX LEDs on TTL and Wheel on Motor

Good evening everyone,

Two dumb questions:

One,

I'm working on getting simple RX/TX traffic indicator lights on a 3.3v TTL system.

 

The LED is a tri-color RGB LED (datasheet).  I'm trying to accomplish something like in this post here, the Olin answer.

General InformationNon Pneumatic Tire / Airless Tire (actually just the wheel), matching tire and hub attachment (for printing the wheel without supports) Some … Read more

New natural rubber tires from DAGU

When DAGU first produced the “Magician” series of low cost robot chassis’s we used a wheel commonly available in the market.

After the MkI chassis bellied out on the stairs I rebuilt the chassis to give an extra 55mm (about 2inches) clearance in the center. The new chassis is also 50mm … Read more
RC lawnmower for cut the grass from my android phone !
Using a
Hi everybody, First i present myself, so i am a 19 years old boy from france, i am actually studing at the university in tours ! I like technologics hackings and i … Read more
navigate in various ways, teach me about robotics
Using a
Hi! MAEP 2.0 is the second version of MAEP (please check it out if you haven't already). I won't go into all the details about things that are the same as the … Read more

Solarbotics GMPW 2-5/8" Wheel

 

I have been hard at work creating some new CAD models to share with the LMR team. 

This is the Solarbotics GMPW 2-5/8" Diameter Wheel.  This wheel is made to match the GM2, GM3, GM8, and GM9 gearmotors.  It is modeled in SolidWorks 2008.

Navigate in various ways, teach me about robotics
Using a
Hello!!!! This is my first microcontroller robot (besides the Boe-Bot). I decided to learn to use the Arduino because it didn't seem to hard to learn, had a lot of … Read more

42 x 19 Wheel

42 x 19 Wheel - again not sure of the Manufacturer, i bought them from coolcomponents

Formats: Inventor 2009 & Step

Hey all This is my first robot and its taken me quite a lot of research but google is my friend as i've never done anything like this before. Inspired by many of … Read more
calculates the speed, diameter or rpm for your robot
Hi guys ;)   Back again with something cool for you... so here it is... This is a program to calculate: speed - knowing your wheel diameter and rpmwheel diameter - … Read more

Homemade wheel encoder

Basically I just printed out one of these (laser printer recommended):

encoder_40_s.gif

...And attached it to a wheel (double sided tape recommended).

Then I hooked up one of these (a 2$ IR sensor: QRB1134):

qrb.jpg

...And attached it to the motor pointing towards the wheel.

Dagu has a nice range of wheels, particularly Omni wheels but until now it has been difficult to mount them. I have now designed some universal hubs that allow you … Read more
DAGU electronics recently sent me some omni wheels and ball casters to check out. These are great for robots! The double omni wheels have strong steel shafts … Read more

society of robots carpet monkey

http://www.societyofrobots.com/robot_carpet_monkey_v5.shtml

Nice little creature with legs on wheels. Or something like that. It doesn't jump, like Fritsl's creatures, but it is nice to look at. And to gawk at the fabricating techniques this guy masters.

8ik

i bought in to this deal - and it really is the most funny set of motor & wheel I have encountered so far: http://www.solarbotics.com/products/gm10w_deal/ Cool … Read more