Let's Make Robots!

Looking for RoboVoice IC

I have been looking for a RoboVoice text to speech IC and it seems they don't sell them anymore.

I'm posting here to see if anyone has an extra one on hand that they are willing to part with? I'm willing to pay or barter for it.

dead Lipo battery?

Basically I have zero experience with lipos but I just bought my first one, a 2s. First thing I connected it to my simple lipo charger but it would not charge it. I then connected it to my friends accucell and it gave a reading of 3.85 and the rest were zero. So appearantly one of the cells is dead, however when I measure the voltage with a multimeter between the middle connector and the two around it, it gives 3.78V and 3.78/3.79V. Now I have read they should be perfectly equal but I am confused why the charger gives zero rather then something like 3.78V.

Wild Thumper and T'Rex controller

My apologies if this has been asked before. I tried to search, but couldn't seem to find anything specific on this. 

Mobile Robotics Outreach Lab

Howdy fellow roboticists. So, I'm trying to put together a robotics workshop based on a modified "Start Here" bot. I want to give elementary and high school students in my area the opportunity to do some hands-on robotics and coding. I live in a rural area where there aren't a lot of opportunities in that vein. It'd be part of my college's Science Outreach Club. If any deep-pocketed robot-loving pro-STEM individual wanted to help with kit costs, the link to follow would be here:


Thanks for all you do, LMR.

Mounting Wheels to Servos

In an attempt to answer a question about using wheels with CR servos, I'm moving the following post from the Mr. General thread.

Im sorry for my english. It's very poor. I used google translator to translate some sentences:(

Anyway, I ask about servos, because i want to use one of this wheels to make robot based on this project:

PID line follower help

Hey everyone. I have a line following competition this weekend and I have prepared a simple robot for it. My robot is tracing lines pretty well, the only issue is that when it comes to the end of a line, it rotates in one place. I want to change it so that it continues to go forward after the line finishes because the competition track has several gaps in the line.

Review prints

Shipping of the overlord  is getting close , while am looking for filament to feed the machine " excitement reaching feverish  ".  am after suggestion on what to print. What am thinking is having three  categories art, mechanical,all things robotics ,

Useless USB camera

As years went by, few USB cams are now sleeping in the drawers. Pity to throw them away, they were such a great add-on to a computer back in the ice age. Now these USB little gems are looking for something to do. Can anyone please provide a subject or hack to use them Arduino projects?