Let's Make Robots!

Robotics Literature

Well I am the epitome of the word "beginner" when it comes to robotics, electronics, mechanics, etc. and I wanted to know which books or magazines one would suggest to a beginner with absolutely no mechanical background. I've heard things about "Robot Builder's Bonanza" and The Evil Genius Series, but I've also seen comments that these books can be hard to follow without an understanding of some electronics. I am still in High School if that will narrow down any suggestions. Thanks for your help.

Miniature Swarm Bots - Prototype

Cool, miniature bots. These are prototypes, but they show how they want them to be eventually.

Sound Sensig

I want to find a simple, easy, small, solid circuiti to detect environment sound pressure level

can anyone post a  good schematic?


Ant Hexapod with very cool moves

Hexapod with very cool moves



The video may take a short while to load.....its worth the wait

How do you get your bot to choose the right direction?

I have been trying everything to figure away to get my robot to choose the direction that have the greater distance.  I can't seem to figure out whats wrong.  I tried to figure something out.  One time I wrote it different and it would wait till it got to the last case and turn right no matter what. This is my code. 

Break dancing Robot

Manoi humanoid break dancing.


Giant Robot Hand

I just came across this and thought it was a bit cool.

Tri-Color LED Resistor Question

I've seen Oddbots tutorial about LEDs and picking the right resistor, but since this LED costs a few bucks and the wordage is different on Radio Shacks parts I want to make sure I have it right.

Supply coltage is 5 volts
Forward Current 30mA (green/blue), 50mA(red)
Forward Supply 3.5 volts typical, 4 volts max (green/blue); 2 volts typical, 2.6 volts max (red)

SR05 Help on first robot

Hey everyone,

2 tests and 2 failures - what am I doing wrong?

Hi All,

Firstly - I am fairly new to the Arduino but have experience in C.

what is wrong with my code?!

i dont know what's wrong with my code!

i made a simple code that should make my robot simply avoid walls, stuff etc.

i placed SC-QR-1 (my robot's name) upside-down and pressed [F5] (the "run" shortcut) and watched him move his cute little robot legs..     WTF?

the new code seemed to work untill the walk part was over and he started to turn..    ..left.        and then again left and again and again..    etc.

he is suposed to keep walking!!!

dumb question about capacitors

Hi all,

I recently added a 0.01uf capacitor across one of my ICs ("decoupling"). Thanks for the advice guys.

It works great at supressing electronic noise, but I don't understand HOW. It would seem to me that connecting the positive right to the negative would shut the whole thing down. But obviously it didn't. So what does a capacitor's uF value mean?

How much current is allowed to pass through it?

Or how much current it stores at any given time?

picaxe: hardware not found

I tried to run my first program on the 28 pin Project Board. The program is the same as Quick start in the manual.

When I try to download the program, the programming editor says hardware not found.

And it says 1) hardware not connected (it is O.K.) 2) hardware not powered (I checked the power is more or less 5.2 V) 4) chip needs a reset (which i tried several times).

Now I have no idea what I can do. Could you give me advice?


My setup:  XP (professional ver 2002) service pack3.

what servo's should i use with PICAXE-40X2 micro (3V) and what battery voltage?

hello i recently buyed PICAXE-40X2 micro (3V) and i would like to know how many batteries should i use and what servo. thanx

Begineer here help me

 I am doing my B.E in Automobile engineering ,I am intrested in robotics , so i need help to do some projects that is very basic

driving motor with bjt

i want to thank every body here for this usefull forum and the great answers i have found.

I want to run applications with PIC MCU but PIC can not sink them(like DC motor).so i need transistor.

but as i look to for example C945 datasheet,the betaof transistor is not specified!!!!!!
only a range is specified for beta.

so how can i have precise design to let my transistor work with the exact CE current I want????? 



Beginner Here, Need Some Advice...


My Greeting to all of you part of this site, its awesome.

So, I am a student of Diploma in Electronics & Instrumentation in India, & I would very much like to make a robot myself but i am a novice here & don't know where to start.

I have the following knowledge

1) Good Grip on C & some knowledge on C++

2) Knowledge on Basic Electronics, Analog & Digital

Do I qualify the necessary knowledge to understand & build a robot ?

Moreover, how much it will cost to build a primary robot ?


hacking toys

hey all,

i'm trying to take apart a bunch of toys and other small electronics. They all have a push-button that mashes down on the PCB to operate. the spot underneath the button looks like this: (forgive the hasty visual):delete-me.gif

I think that the push of the button connects the two. So my question, then:

What's the best way to get "electronic-ize" this so my IC can do it?


-solder them together and turn the power on/off via my IC?