Let's Make Robots!

Arduino Speech Code

Based on a talking-lift-buttons project published on instructables (credits to ICstation); I have modified the schematic to the following:

- Arduino Nano controls the audio storage chip APR9600 which includes 8 messages.

- Arduino generates random 8 numbers

- each number calls one of the 8 messages.

The result, it will look like as if the Arduino is talking out of its own mind.(more realistic if we extend this systems into say 50 phrases or more which may need a different audio storage module than APR9600)

Order cancelled?

I placed the order from marketplace and was charged from paypal but I chack back next day it shows "cancelled".

How does that work now? Maybe you want to shut it off and re-direct back to RobotShop instead of confusing people?

I need internship, plz help

Hi LMR...I have a one month holiday this December, so want to get an internship, or work with/under someone...if u r willing to take me or can help me out then it'll be great. You can see my childhood projects here(LMR) itself...

I am from india and if it would be self funded, then a nearby country like China would be good.

Currently I m a First year BTech student, Electronics and communication engineering, IIT.

Wild Thumper 6W - Problem with motors or T-Rex controller (PWM signal)

Dear Sirs,

I need your help again because I don't know what is happening with the wild thumper motors or T'rex controller. I explain.

Solar charger for multiple batteries

Hi everyone,

I couldn't decide which forum topic to use for my post so I'll post right here in the "Absolute beginners" because I'm actually a programmer and I'm quite new to electronics so I don't want to put expectations too high. I may do or say something that looks pretty stupid for an experienced robot builder so forgive me and don't hesitate to mention it if it happen, I'm here to learn.

Now that I'm done with the presentation part, here is my multipart question.

I managed to build some kind of Solar Li-Po charger using a tutorial and stuff I bought at Adafruit.

Banana Pi not detecting I2C

My hardware being used is a Banana Pi and Picaxe 28X2.

Most commonly used electronic components .

Hello everyone ,I am making this topic in order to experienced members  say what are the most commonly used

electronic componnents .And then each and every new member will see this topic and buy a bunch of those

or even make a kit and sell it on a site like solarbotics used to sell start here robot(I mean lmr to make a kit and sell it not the members)

What is your opinion ?

Motor control or servo control


I came across this circuit on google. It controls motor speed by simple flip-flop that gives a PWM signal.

The question is can this be used as a servo control ?

first use 5 volts supply instead of 12 volts ...then by replacing the 3RD NPN transistor with a servo. the + goes up, the - goes down and the signal feeds from the flip flop...can we do that ??

Launching the Internet of Toys (IoT)

Erle Robotics and Canonical combine forces once again to launch the "Internet of Toys" (IoT).  Collaborating with the Hybrid Group, they will build the next generation of toys bringing together makers, hackers, DIY robot enthusiasts and developers.  


What are you building for Halloween?

So, is anyone building anything fun for Halloween? Cool decorations, costumes or animatronics?

I'm working on a candy jar skull to great trick-or-treaters at the door. The lid will open and reveal a "Take One" sign written in fake blood. The jaw is also animated and I plan to add sound and animated LED eyes.