Let's Make Robots!

picaxe

  This robot was built for my google science fair entry.  The goal behind this project was to see if an inexpensive robot could trigger anti personnel mines.  … Read more
Hi guys, For a while now I have wanted to buy a cheap toy car and make it RC. I was at the cheap shop the other day and found a few $2 toy cars. The cars were super … Read more

Getting into Arduino

   Well my friends, I think its time for me to enter the world of arduino.  After working on my last project (I will post it soon, its for the google science fair so I just have to finish up it's website.) I have deciced ill have a go at arduino.  The reason I came to this conclusion is I needed something that can do simple multi-tasking.  During my google science fair project (That I will post soon to LMR) I needed to do two things at once.  The first was very simple.  I just wanted it to go down and come back a little to the side of the first path down a

Warns me when a parcel or letter enters the Post box - "FireFly" Themed
     For years now i have wanted to "Hot-Wire" my Mail/Parcel Box, unfortunately most mail boxes in CH can only be found on the ground floor (strange but true) … Read more
Prevents losing by forfeit. Forces action. Sets bar for family team.
Using a
EeGads! That's what crossed my mind when I submitted our team registry for Robogames. I know we're behind schedule, inexperienced, and hacking left and right, but … Read more

How to use HPWM for picaxe chips.

This information is based on the chip that is used for the 20x2(PIC18F14K22) To get a better understanding of the modes, I suggest referencing this datasheet for further information on the chips features. IMages and info are referenced from both the picaxe 2 manual and the PIC datasheet for the above mentioned chip.

HPWM, what is it?

Error-hardware not found?

Hey LMR,

this is probably some silly thing i missed but i kinda need the answer fairly quick so, uuhh...ya

I'm getting close to finishing my start here robot and i need to get the servo to centre position... (I'm using the usb cord and windows vista basic). I downloaded the picaxe programming editor and the drivers for the usb cord and the cord is showing up when i go to options> serial port>com 4. But when i plug in my picaxe 28x1 to the usb and press check firmware this shows up: 

Hardware not found on com 4:

Possible causes:

Serial RFID reader troubles

I recently purchased the seeedstudio serial RFID reader for 125khz tags, but I cant really understand the datasheet. I am having trouble figuring out how I am supposed to interface it with my picaxe. 

Here is the product:

http://www.robotshop.ca/seeedstudio-125khz-rfid-module-uart-2.html

And her is the datasheet:

http://www.robotshop.ca/content/PDF/datasheet-rfr101a1m.pdf

Obstacle avoidance via Sharp IR
Using a
Update: I’ve had a nice breakthrough in the leg mechanisms for K’nexabeast.  The motion is now much stronger and closer to Jansen’s ideal curve.  Read more

Airship differential steering troubles

Hi all,

I'm faced with a problem - some friends and I are building a semi-autonomous airship (only a little one) and I've been given the electronics and programming to do, but I'm having trouble getting the pwm commands to work properly.

I'm using a little joystick with 2 pots to control it, the y-direction one controls the overall speed and direction of both motors and the x-direction one puts a left/right bias on them to turn the thing.

Here's the bit of test code I've got with just the one pot being used

[code]

symbol zero1 = b1

symbol zero2 = b2

Read GP2D02 into digital input on Picaxe 28x1

I just had a read through of your article "How to make your first robot" on LetsMakeRobots.com. This is a fantastic article, however, I've got one slight problem; I am working with a Sharp GP2D02 instead of GP2D12 and the code needed is somewhat different.

Battery Backup 12v

Hello, I wanted to add a battery backup to a Picaxe circuit so when the AC main fails the power will switch from the AC-DC transformer to a 12v battery which is then lowered to 4.5v to power the PICAXE board.

after some research I found this circuit which seems pretty simple and I wanted to know if you people think its good or will I have fried PICAXE for dinner.

Thanks in advance!  :D

Inverse Kinematics in VB

Hi everyone!

I'm trying to decide between 2 things before I get stuck into either, help!

Basically I want to try implementing some inverse kinematics on my custom humanoid, but it's running on a picaxe so I can't do it autonomously as the picaxe can't do floating point...

Picaxe Debug

Hello LMR,

I mean this posts for thos who know something about Picaxe:

I need help! Please someone go over the code and tell what did I do wrong so that when I make pin 4 = 1 nothing happens!

Did I miss anything, did I add something that is wrong?  Don´t worry about the spanish parts they are just labels.

 

AXE033 clock add-on

Hello LMR,

I was wondering recently if there was a way of using another clock that isnt ds1307 for the AXE033 lcd module from picaxe.

I wondered as I can´t find any and i´m not really up to ordering it, so please tell me: is there another ic or will i have to find one?

Thanks is advance!

  Here I will try to help begginers with the most attractive electronic device the LED. :D First of all the definition of a LED: An LED or Light Emitting Diode, … Read more
I am a 1st year civil engineering student, but my main hobby is robotics, electronics - if it can be built, I want to have a go! I've built robots for many years … Read more
Monitors room temperature
Hi everybody! Just finished with my new little gadget and feel like sharing with LMR. :) The gadget is room temperature monitor for our baby we are waiting to have … Read more

Question about Picaxe Random function

 

I understand that the picaxe does not have a clock, and that the "random" function will produce numbers in a sequence between 0 and 65535 (not really random), but I have a question.

From memory, when I used commodore basic all those years ago, you could write something like rnd(9), which would produce a random number between 0 and 9 (I think that's right), so is there any way I can get picbasic to do the same. I want to switch, on and off, 4 led's in a random sequence.

Thanks in advance :)

How do you tell if a PicAxe 14m is bad?

I tried downloading my program to a picaxe 14m.  Now all pins show 4.5v, no matter what program I load. I did a firmware check and it says it loads a new program, but nothing changes.  How do you tell if the chip has gone bad?  The error probably lies somewhere between the seat and the keyboard, I know...just need to know which error.

Mech

I'm a little confused with pin numbers on the Picaxe 28 project board

I have a motor driver fitted to the board, and 2 motors connected to the 2 sets of motor pins. These motors are driven in the code using low 4 : high 5 : high 6 : low 7.

I have a servo fitted to pin 0, and some led's fitted to pins 1, 2, and 3.

This all works fine, and it does what I want.

There are "vacant" digital output pins, which are numbered on the board 4, 5, 6 and 7, which are the same numbers that the motors use.

Which platform is better? Arduino or PICAXE

Hello LMR world..:) Im a complite beginner.. Im studying robotics and Automation first year.. i know ill learn this stuff in the university  but entusiasm in me doesnt let me to sit down and wait for 2 3 years..:) While i was searching for PICAXE one of ma seniors sugested to me to laern and explore PIC microcontrollers... he said ull be better prepared for universyty exams in future and can design your own development boards which is chipper and easier..

A not so dumb but practical motor controller

I've been working on Leo's motorcontroller and reading a lot lately on bots.  It got me to thinking about using multiple uControllers to do multitasking.  I've slimmed down my original motor controller concept to just a PicAxe 14M, a L293D and some resistors. What makes this motor controller different is that it does more than just control the speed and direction of two motors for an indefinite amount of time.  It's possible during setup to make it that each command only last for five seconds or increments of five seconds.

Signals when mail is delivered
Last winter my father asked me if I could make a mailbox sensor for him. That winter was long and cold with lots of snow and he found it frustrating to make his way … Read more
It wanders around, avoid obstables and dosent' fell from edges
Using a
Hi all, Here is my first robot using a micro-controller ! I started with the Start Here guide and it evolves a bit. I rewrote the code, it might not be as good as … Read more
Drives around and participates in a good party!
Using a
Today I am a little slow, but all right. Yesterday I puked and slept all day. Friday I was at a party with some good old friends. 3 birthdays in one. The invitation … Read more

Picaxe Net Server

Hey guys,

Is there anyone here who has already used the Picaxe Net Server module? :)

What was your experience?

Thanks!

Navigate around via sharp IR
Using a
I got the parts yesterday and i done building it already :) Read more

Several SRF05 sharing the same picaxe's trigger output pin ?

Hi guys,

First of all, since this is my first topic here, I want to thank you all for this great community. I have learned a lot and I have just finished my first robot thanks to you :) I am now thinking about the next one, and here comes the question !