Let's Make Robots!

Switching voltage regulator but what after it ?


Here is a hopefully simple question, and a little explanation to go with it.

Okay,here we go...

I am currently adding extra sensors and bits and bobs that eat up power on my robot and I would like to give my robot a bit more power to work with and so that it can run longer. That is simple thanks to12 AA batteries

My robot uses a Picaxe 28X1 and from what I have read it doesn't like more that 12V.

Here is the problem: my 12 AA's give out  18V ( and yes I did use a calculator! ) but I can only give my chip 12 of those 18V.

Picaxe programming, problem with head turning and scanning.


Picaxe programming, problem with head turning and scanning.


For some time now i have been playing around with my code to get it just right, but i have hit a snag that i cant seem to fix.


If you are good at programming you will see the mistake


Difference between 2 capacitor values


I am trying to get all the parts for a second IR upgrade pack for my robot.

So far I will be able to roder all th parts exept one : the capacitor, on tecksupplies the only one that seems to match is called a 4u7 capacitor, the paper that came with the upgrade package sais I need a 4.7uF one. Is there a difference between the 2 values or is just a diffrent way of writing it ? it.   

And if the 21 values do not meen the same thing would anybody have a spare one I could buy of them ?

Picaxe programming

I ve been trying to write a code for my robot, but no luck. This is for a school project so it is sort of urgent. I tried adapting Frits Start here robot code. I will learn coding but i dont have the time at the moment.

if anybody could help that would be great !

IR picaxe upgrade problems


i got the infra-red upgrade pack and i connected it up and copied and passed the example code and i keep getting a message: ("infrain" command not supported - use irin!) but when i replace infrain by irin it doesnt work ether .

anybody got any ideas?



Here is the code :

Joystick and picaxe 28X1


Here is a pick of and old joystick from a 360 or ps controler,

I have 2 questions, the thigs on the side that sens the position are they potentiometer ? and would a chip like a picaxe or some other one be able to interpret the signal coming to it ?


witch platform or language to learn this summer ?


This summer i am planing on going to a summer robotics camp and since you guys have a bit of experience in that area ;) , i was wondering witch would be the best platform or language to learn?

Robotics is realy intersting so i would  love to study it.



L293D problems


I was wondering if anybody elts was having slight over heating problems with the motor driver chip.

It realy heats up !!!!!!!!!!!!! Is this normal?


How to connect a light dependent resistor to a picaxe 28X1


I recently go a light dependent resistor

and i cant seem to figure out how to connect it to my picaxe28X1, would anybody here know how ???

Any help would be apreciated !!!!!

Simple control for stepper motors


I got a printer with a scanner, the printer head and scanner head are controlled by stepper motors.

I was wondering if there was a way i could use the microcontroller that came in the printer ? Or is it possible to buy a microcontroller that can make the motor back and forwards ??

Thanks for any help.