Let's Make Robots!

pic

PIC Is TTL or CMOS?

Hi all, I have question about PIC16F877A... I need to interface it with other ICs like 7segment drivers,
and I have to choose between TTL and CMOS technology. But I can't find out on the datasheet if the mcu is in ttl or cmos one.
The final question is: have I to consider the 16f877a a ttl or a cmos IC?
Many THX in advance ;-)

Navigates by IR - avoids obstacles.
Using a
Presented here is my rendition of the Start Here robot using a PIC16F690 and programmed in Assembly with the MPASM Assembler.  In addition to the micro, parts … Read more

Comunication between two MCUs

Hi all, this is the question: which is the fastest method to exchange informations between two 8-bit mcus?

I'm developing a tacho unit for a friend's go-kart. As long as I'm planning to use multiplexed 7-segment displays, I want to dedicate one micro to the multiplexing job and the other one will perform measurements and other operations ( the tacho is only a part of the things I want put on the kart )... maybe I'll use two PIC16f877a.

To have all finally working, I nedd them to comunicate, with the one telling the speed to the other. My ideas were:

Move around, controlled through Remote Desktop Connection, 27 MHz R/c controller, 2.4 GHz ZyXEL Roouter to serial port to PIC 16F628a, Voice activated and uses TSOP sensors to navigate it's way. It also records voice and Camera inputs.
Using a
This is acctually my first robot. I know that I had to start small but as I just passed GRADE 10 and I'm studying for IIT, I wouldn't have any time to do another … Read more

Homebrew Servo Controller Issues

Hi,

I've been developing my own serial servo controller for the hexapod I'm working on, using a Microchip PIC16F74.  It accepts serial input and controls up to 20 servos. The servos are connected in ports A, B and D.  Power for the PIC is from a 9v battery via a 7805 regulator.  The servos have a separate power supply from a 6v battery pack.

pretty cool fountain

Found this while surfing the interwebs. Thought it was interesting and I'd share it with ya's folks

It uses some common components(well, aside from the uv leds that aren't available at your local hobby shop)and a pic.

 Now just makes me wonder how to do something like this...code wise.

http://cre.ations.net/creation/the-time-fountain

Wavecrafter chirps and beeps at you to let you know about things and stuff.
So, a little while back I made a posting about adding a low-cost ADC module to micros for various reasons. At the same time as I was testing this concept out, I … Read more
Last weekend we had a nice weather, and I made a Light in the garden, and decided to make a photo of it with my robot next to … Read more

What microcontroller should i use?

Am planning on building a robot that  would have the abilitty to navigate , avoid obstacles and collect some items.

What chip should i use?

Whats the difference between pic and picAxE?

 

thanks in advance :) 

Total beginner with a PIC question

Right so Im a trainee at the university as a technician..

 

Work's have provided me with a University made microcontroller board with a PIC18F4520 on it...

 

Im a total newb with electronics and Im finding it hard getting to grips with this board, I really want to follow the tutorial with the 85$ robot and for that it requires a PICAXE board...

 

PIC MicroController Questions

 

I am about to get some samples from microchip and buy a pickit 2 as well

 

what micro cotrollers do you suggest that i pick up?

i do have some below that have already shipped do you suggest any others  since tomorrow we can get samples?

Link here ->   http://makezine.com/halloweencontest/

 

Canadian eletronics supply

This is a site that I have recently found browsing ebay for a local supplier to help me along the way of learning and building.

 

http://www.dipmicro.com/store/

 

 

Please post if you know of any other Canadian affordable suppliers

18f252. light up an LED

I'm trying to light up an LED with the 18f252.

here is my code

#include <p18f252.inc>

LIST P = 18f252

PIC16F690 'delay'

I have spent the past day(i know it sounds stupid) figuring out how to make a 1sec delay on the PIC16F690 to make an led blink. hope you guys can help.

 

this is my code :

*************************************

'

; EQUATES SECTION

 

TMR0  EQU 1

STATUS EQU 3

PORTA EQU 5

PORTB EQU 6

PORTc EQU 7

RS232 Communication with MCU

So I am making my own CNC - PCB Miller. It is communicating with the computer using RS232 (UART), but in my testing, I find that I don't always get the correct characters, even at 1200baud. Does anyone have a method to suggest for error-checking an incoming data string over serial? I was thinking of doing something like this:

CPU sends data to MCU 4 times.

MCU checks to make sure the data is repeated exactly 4 times.

--If yes->send "OK" 4 times

--If no->send "NOT OK" 4 times

If CPU receives OK, queue up the next data to send

PIC16C74B-04/P

I found this 40-pin chip in a CPU battery. It is labeled PIC16C74B-04/P. I have the datasheet, but that's not my best language. i just want to know if its possible to use this as the ones used in LMR - if is possible to make a robot with this chip and what would i need to program it. I read something about ICSP(in-circuit serial programming), which I believe is the process used with this chip, but that's as far as I go. Thanks.

how does XORF work?

howd yu do?

I finaly caught on to the PIC assebly language!

I am using a pic on a simple little robot with the usual bump, revese, turn, obsticle avoidance. it will do more than that later but I havent even writen a PIC program yet so I am starting small. anyway there is on thing I don't understand in the tutorial i read. it is the XORFcommand. I understand xor gates but how does it work here; http://www.pictutorial.net/?page_id=152

it says 

Hello! I was wondering if anybody could help me determine compatibility issues :(

Dear Robot enthusiasts,

Hello all!  This is my first question on here so please feel free to critique my writing style.  

ATMEL or PIC

Okay, this is just a little "this vs. that" quiz so I can find out what you guys generally prefer. Vote PIC for PICs or PIC based devices like PICAXEs and ATMEL for ATMELs and stuff like Arduinos.
Explore an environment, create maps, take pictures, never get stuck.
Using a
Tesla will be a multifunctional robot that will have priority tasks. Unlike other robots that will just "do" things, this robot will have tasks only if certain … Read more

The BIG board!

Ok, though you would like to see what I am working on now. I am having this as a blog post  until there is something worthy of posting. It sure looks cool or what :)

Dual 18F4620 board with supporting 18F2525 for display

Right now I am working on my master-slave-slave board that will suit my needs for a long time. It has a master 4620, that communicates to another 4620 for processor assistance.

 4620 MASTER: Spaces for 5 servos, rs232, I2C, sn754410 motor controller, 8 ADC channels, 2x5 header so it is expandable into another board.

4620 SLAVE: Setting switches, proximity IR sensors (8 for complete sensing), speaker, encoders (rear and front for a car drive bot, left and right for 2 wheel operation), 38khz IR led driver, bumper switches and spaces for 6 servos I2C.

Robotic Crane using PIC16f or 8051

hey! i'm planning to make a robotic crane.and i reallly need help.

the basic idea is to build a robot WITH PIC16F877A (OR 8051) which carries magnetic loads(it has other auxilliary functions as well)

Stuck Code

It appears that If an object is really close to the SRF05 sensor the code will get stuck.  I'm thinking this is because an interrupt occurs while i'm waiting for a pulse from the SRF05.  since the object is close the pulse is short and ends before the program returns from the interrupt.  I've tried to disable interrupts for just that short period of time but that isnt working. 

my code looks like this  (if you'd like to see more just ask)

        bcf        INTCON,GIE ;temporarily disable interrupts

Navigates around avoiding walls
Using a
This is the first robot I built.  It drives itself around trying its best to avoid running into walls and other objects.  most of the circuitry has been done for … Read more

USB power?

Is it possible to use this USB breakout board as a 5 volt power supply for your microcontroller projects? If so, then do you have to use a voltage regulator?
A snake robot. Serpentine locomotion and other snake gaits read from a micro SD card. Obstable avoidance and eventially path planning.
Using a
This is our entry into the PIC32 challenge. Please check it out on http://www.pivut.com/snake.htm and VOTE FOR US before 2/10/09! It is our first robot. All of the … Read more

The new beginning

Hello Robot-creators!

It has been a long time since I was last active at this site... Mainly because I've been busy making stuff like this:

                                                           Billede187LMR.jpg

(Bidirectional 16-bit databus btw).

It's quite sad actually, now that I see all those cool robots that you've come up with, and all I have is stuff like that on the pictur above. I want to make something useful! Or at least entertaining... :)