Let's Make Robots!


This is my picaxe 20m2 dev board. It has picaxe itself, a LM7805 voltage regulator and two DIL sockets, one for ULN2803 and the other for L293d (already in place). … Read more

PICAXE 28x1 Syntax Error

I need help, I'm trying to program a sonar with the PICAXE programing editor and tere's this Syntax error that shouldn't be there.

low portc 0
pulsout b.5,5
pause 200
pulsin portc 0, 1, w1
w1 = w1/29

It only complains with the "pulsin" line, the "low" line doen't create any sort of problems. What's wrong here?

Line robot sensor

Hey guys, i want to build a line following robot and I was scouring ebay for some sensors


I found these but I wasn't sure if they would work, as I haven't done this before. They're pretty cheap.

having trouble with power supply.


I have used a 40 x2 picaxe IC. My line follower has that,  L7805 voltage regulator , and  the IC L193D motor driver. I`m using 2 300rpm motors and 3 sensors.

My problem is , even though i gave a power supply of 18v, the power is not enough to drive the motors as well as activate the sensors. I can`t use a higher voltage supply because it will burn the picaxe IC.

Help? :S

Interacts with human beings, meows and purrs
Using a
Update 29/05/2012 Eye mechanism designed. Built the mouth, just missing the rubber pipe. Update 28/05/2012 Schematic of the ISD2560 added. A 2 DOF rubber pipe … Read more

Connecting buzzers to picaxe


I have recently built a Robot highly inspired from the start here bot.

I want to connect a buzzer to it....


Q1. Can buzzers produce different sounds just like speakers???

Q2. How to connect a buzzer to Picaxe 18-Pin Project Board???


programming picaxe

ok you probably get hundreds of people asking this queastion but i cant program my picaxe 08m2

it says error hardware not found on com1 (com one is the only one it will let me select)

i have tried everything  (apart from reset for i see no way to reset a picaxe 08m2

i am using the axe027 usb cable please help



Alternative to AXE027 USB Cable

One place where the "going got rough" with regards to my (Argentine) Picaxe Developer Site is with a Picaxe serial download cable that IS NOT RS-232, but USB instead.

If I can only reach those with a serial port on their PCs, then this project will never prosper. USB is a MUST.

This is my project [DON'T LOOK, JUST BORING]

STARTED 5.7.2012

Okay, so here's my project, what i am designing.
It is a robot arm!
Some stats:

- 4 servos, not very big
- PICAXE 14M as brain
- SM-S3317S 2.0kg at 4.8V
- 4 Rechargeable 1.2V batteries
- Polymorph and lightweight woodsticks as materials 
- Maybe somekind of sensor and IR receiver
- Potentiometer to control

Pictures coming soon!

Allows your robot to control PC applications / display sensor data
Using a
Gobetwino is a free program designed to allow Arduino boards to control PC aplications. Because it reads a serial com port it is not limited to Arduino boards and … Read more

Interfacing yor robot to your PC using Gobetwino (can work with any MCU)

I am currently working on a project where I need to teach my robot to "see" using an ultrasound sensor. In particular it must find and collect drink cans on a playfield and return them to a specific location.

To make the programming easier I wanted to take the sensor output from the robot and display it on the computer as a chart. As I am a terrible programmer I did a quick google search and came up with Gobetwino.

Phase 1 (Updated 29/4 - New video & code.)     Here's a little robot built on CTC's excellent Tiny Tank chassis. It's based on a Picaxe 28X2 which … Read more

EasyVR to Picaxe-28X1


I have bought a "Start here V 2.0" robot kit, with a Picaxe-28x1 IC, and Picaxe-28 Project board. I want to get the robot to take voice commands, and be able to talk back, and have been looking at the EasyVR Module.

But reading the manual for the EasyVR I can't figure out how to program the module trough the Picaxe microcontroller. Is this at all posible?

The manual mentions ROBONOVA, Arduino and Parallax Basic Stamp and says that they have a "bridge" program, but doesn't mention Picaxe.

DIY RC, Moving to Arduino, RasPi, and other questions

I have added more questions to the end of this, so please have a look.


I sort of started this question on another page, but I thought I'd move it here so I'm not hijacking someone else's page.

2 questions here;

1: I'm looking to move from using picaxe to Arduino. Can anyone give me any pointers on where to start? (I know this question's probably been asked elsewhere on LMR)

Can Arduino shields be used on Picaxe


I'm new to robotics, and just bought my first "LMR start here" robot kit. I haven"t recived it yet, but I am all ready having great plans about how to modify it (as I guess all newbies do).

So I have searched around to see what is out there, and I see that there are a lot of modules (or shields as they seems to be called in the robotics world) that can be conected stright to the Arduino.

So my question is, having just bought a Picaxe-28 Project Board, with a Picaxe-28X1 Microprocessor; can the Arduino shield be used with the Picaxe-28 Project Board?

Picaxe M2 series 'multitasking'.

The M2 Picaxe series has multitasking (time slicing) to allow up to 4 tasks to run simultaneously which the manual says is to make monitoring switches and flashing LEDs etc, easier to program.  I was just wondering has anyone explored how far you can take the multiple tasks idea.  Has anyone, for example, tried controlling a servo, monitoring switches and varying PWM on a motor?

I've got a feeling that everything will get a bit glitchy, but perfectly happy to be proved wrong.

LMR Robot Building Workshop at Maker Faire NYC!

Ta Daa!

Thanks to the kind sponsorship of our friends at  we will be able to offer a robot building workshop at Maker Faire in New York this year!

 Details will follow, but Picaxe will supply the PICAXE-08 Motor Driver Board, along with some funding.

SISTEMA SPUTNIK: Argentina´s own Picaxe Developer´s Site

Esteemed colleagues, members and friends,

It is with a great sense of acomplishment that I share with you my humble enterprise. I have just launched a website called Sistema Sputnik, that aims at teaching basic electronics to teenagers and grown ups who wish to take it up as a hobby. Picaxe Microcontrollers are at the heart of the system itself.

Picaxe LCD problem


A friend of mine is using a picaxe 20m2 to drive a milford instrument 20x4 LCD with a serial backpack. However, when he turns it on, it just comes on with a screen filled with triangles. The LCD is connected to pin 0 .The code he's running is below. What is the problem?

PS: This is my first post, so sorry if it's in the wrong place.



Eight servos - Picaxe 28

I'm trying to build a climbing robot with a Picaxe-28 project board, however according to my design, I need 8 servos. Do you think there would be a problem to plug so many of those? Is there a way to feed the servos from two different sources of energy? As far as I know, the board I'm using is capable to manage that amount of servos. What do you think?

I know nothing about this so maybe a little orientation about what should I read would be great! Thanks in advance.

IR sensor-Again

I have again problems with my IR-sensors. 

I have two of these http://www.dfrobot.com/index.php?route=product/product&path=36_55&product_id=114 connected to input pin 6 and 7 on my 28x1 picaxe projectboard. And even when there's no program on the microcontroller the sensors think that there's something infront of them, but there isn't.

Drives slowly and nearly unstoppably looking for infrared fish to eat.
Using a
Videos: Introducing FishTankFishTank UpdateFish Tank Meets Piranha TankCode: ver 0.3 is the basic code with obstacle avoidance and IR followingver 0.4 adds some … Read more

PICAXE HWPM - 2 motors

I'm having trouble trying to understand how to use HPWM to control both motors of my 2-wheeled robot.

Failed at the first hurdle!

Hello guys,

I'm asking for advice as I've failed at the first hurdle with my Start Here Robot. I thought I would first make an LED flash using the PICAXE chip but so far I cannot connect to the chip to upload the software!

I am using a PICAXE28X1 and an AXE020 project board as bought in the lovely Start Here bundle!

Matlab and PICAXE comms

Anyone out there who knows how to make Matlab work with serial communications?

I'm in the early stages of writing a matlab program to do inverse kinematics for a leggy kinda robot, and I want to get it to send the numbers to a picaxe via rs232 - seems fairly straightforward?

My test program is behaving wierdly



Picaxe = serial('COM4');

set(Picaxe,'BaudRate', 9600, 'DataBits', 8, 'Parity', 'none','StopBits', 1, 'FlowControl', 'none'); 




B = fread(Picaxe)

Picaxe - USB

I'm working on a new robot and i want to control it with a usb-keyboard,

How can i connect a usb to a Picaxe 28x1 projectboard?

And how can i program it?


Hooking up a servo to picaxe 28x/40x project board.

   On my current project I am using the Picaxe 28x/40x project board and I don't know where to hook up servos on it.  I searched around on the internet a lot but couldn't find anything about where to hook them up.  Not even the board's manual said.  I don't know if I missed it or what but I can't believe that picaxe would just let you go find this out for yourself.  I even entered the code to center a servo and went around on the board and tried to find were it was.  I also remembered to put a 330 omh resistor on the signal line of the servo.  I