Let's Make Robots!

speed

Is an Arduino Capable of Reading All Four Rover 5 Quadrature Encoders?

Note: Sorry this post is so long. I used bold text to indicate the main point of the post.

I didn't want to hijack Oddbot's Rover 5 threadso I'm starting this one here in the forum.

In replying to odong's question about the quadrature encoders I stated (among other things):

How to contol servo speed from serial

Hello all

I have  renbotics ServoShield and I have made a code on arduino where from serialport I can send commads to servos and it happens with that way... S01P1200,S14P2300etc..I mean that  Servo 1 to 1200 posion and servo 14 to 2300 posion

Fancontroller

Right, back again with an update on my idea for a kick-ass fanctroller. So far, I've been coding away and right now, I'm up to the point where the actual fan control is implemented (I've already written the LCD-commands, several input functions, a setup and a menu.) But I'm having some problems.

The mother of all fancontrollers... Hopefully

So, I'm the process of making the -in my opinion- ultimate PC fan/pump controller for use with a water cooling system.

The idea is to make a bracket which fits into a 5.25" bay and holds an LCD, some type of input (probably joystick) and an arduino, so the temperature responses are completely programmable. It should have three fan/pump channels and 3-6 (however many ADCs I have left, at least 3) temperature sensors.

Controlling motor speed with 293 without a POT

This is my first step to robotics. In this project all i did was use an arduino with L293D to control the motor speed without a potentiometer. this was actually an assignment / a small test given to me by CtC (chris the carpenter). the motor is suppose to speed up and down with a delay. 

"stop - ramp up - hold - ramp down - stop"

Servo time/speed and position control (using an Arduino)

Is there a way to control servo position and speed at the same time? ex: you want to build a biped but you don't want the movements to be jerky.

thanks

High Speed Photography Help!

Hello everyone!

this is my first post so im pretty excited haha.

i want to know how to create something so i can shoot high speed photography.

an example of what i would like to do is of a water droplet hitting a bowl of water and snapping a picture when the "crown" (part of the water which gets drawn up from the result of disrupting the water bowl".

i was thinking about a laser activated "flash" which fires the flash of the camera after the beam is broken, but it should have a delay so i can fine tune it and get the perfect image.

calculates the speed, diameter or rpm for your robot
Hi guys ;)   Back again with something cool for you... so here it is... This is a program to calculate: speed - knowing your wheel diameter and rpmwheel diameter - … Read more
Write on the pavement at high speed!
Using a
Speed writter races around with a spring loaded piece of jumbo chalk writting words. Using a hacked "Rebound" RC car for the body and an Arduino Nano for the … Read more

Super Basic

Hey guys, I am a Product Design Engineering student at Glasgow University / Glasgow School of Art, and we just got our project brief for this semester. In groups we have to make a multi-purpose vehicle that competes in a series of challenges, in a sort of 'Vehicle Olympics'. So, the challenges are:

1) Hill climb - 20m track up a steep hill. Simple time trial.

2) Tug of War - Vehicles will be tied back to back, on a Vaseline-covered area. First robot to get further, or out the ring wins

How to increase Torque and reduce speed

hi

i'm building a cat feedar using a rotating hooper..my problem is the rotating speed of the hooper is too fast and don't have enough torque..A few suggestion that i have gather is to buy a new motor with higher ratio.is there any other way to accomplish the same result?

since i have 5 cat.. i'm still looking a way to dispense the food into 5 tray(if possible)..anyone here have any suggestion how to achieve it...Maybe using rotating tray?(but still the same problem with the motor ,not enough power)

 

 

'Axe as RC speed controller

Would it be possible to connect the output from a RC reciever to the digital input of a pcaxe 28x1 board and controll the motor outputs?

Of course it's doable, that's not really the question. But does anybody have any thought regarding it? Has anybody done it? I presume the signal out from the RC reciever is a standard Servo-signal. I know CtCpassed a signal from a RC reciever through his 28x1, but I don't wanna controll servos,I wanna controll a couple of DC motors.

 

UGV Monster truck platform

I'm planning to build a UGV monster truck, based on a Tamiya Super Clodbuster. I've heard that it's a lot cheaper if you buy it in pieces. However, I ran into a bit of a dilemma. The stock monster truck comes with a speed controller. Do I need that too (I don't need any RC functions) or can a motor controller for Arduino or Basic Stamp do the job too. I already own a BS2 with BoE, but I would like to buy an Arduino because it's cheaper, open-source etc. Note: I'm still a beginner in robotics.

Use an Arduino GPS Shield to Fix position,altitutude,time,date........
Using a
GPS:- The Complete Guide to Global Positioning Systems. Blogged Here :- Guide to Global Positioning Systems.   Check also:- Fundamentals of a GPS guided vehicle … Read more

GPS - The Complete Guide - Arduino based Global Positioning System

GPS:- The Complete Guide to Global Positioning Systems.

Updated Here :- Arduino based Global Positioning System

How they Work and How to interface them into your Robot.

Does your Robot need to fix its absolute Position - Speed - Heading - Time - Date & Altitude.


Here is a Guide to explain the Process.

PID Speed Control

Hello All,

I am new to the site and would like some help with DC motor speed loop control.

A basic proportional  control loop actually works.  The problem I am having is that I need my main power supply to vairy, yet keep the motor speed constant.  The project deals with a helicopter where I need to keep constant speed independent of the battery voltage slowy dropping off.

I have designed and used PID loops for DC gear motor position control, but I am having trouble using similar equations in this application that required speed control and not position control.

Sometimes you want to be able to go at different speeds, usually to make serial connections. Here is a snap on / off way of setting it up
Update: Note that the newer Picaxe models can change a lot by commands like setfreq alone :)   This is only for dummies like myself using Picaxe 28Xx standard … Read more