Let's Make Robots!

Navigation with (2) sonars Update 2 (with data)

*****Update 2.16.10*****

Got some data to start thinking about, guys. My thoughts of getting nice, even packs of 4 or 5 is a little out the window. To be honest, I tried to forget that I could see where the robot was facing and tried to make a decision where to go based on just the readings. I couldn't . Please note that I was seeing the readings on a LCD so left was above right not in a straight line. --Now that I think of it, I have no idea why I didn't line them up as it is a 16x2 display. Huh.

All readings were taken L to R

Explain PWM to me, please.

I just need a good breakdown. The eventual goal is to obtain higher (or much higher) torque from my motors but at lower speeds. I am to beleive that PWM makes slower motors but also weak motors. I need strong, slow motors.

Little help with Processing code

So I got my new, nifty bluetooth module which should be a simple data-pipe i.e. data in/same data out. It came default in slave mode but alas, at 115,200 baud! I need this guy down to 9600. I am using a simple bluetooth dongle on my PC and the bluetooth module is good-to-go on the robot. I need to simply send it SU,96 during the first few moments during it's start-up. I have some simple processing code, but I am a little confused as to ASCII and hex etc.

Frits F*cked up!

Did anyone else notice this? Start here... Anyone?

Frits, if there is one thing that pic chips don't like, it is static! You know those silly wrist straps? So why, why in the world, would you take pictures of all your parts for the start here bot on top of styrofoam?!?!?!?

I personally can not think of a more static-friendly item then styrofoam. Why are you leading our LMR kids on the wrong path?

SHAME! SHAME!

28x2 Board --Your Wish List

Well, with all this Walter work going on, I find myself sorta longing for a small, fun tabletop robot --just to play with. I was looking at the standard picaxe 28x board and again, I remember how much it really sucks. No EEPROM space, ADC's have the data pin in the center, no HPWM output to the motor driver etc. etc. I know I have asked this in the past, but my PCB designing skills have gotten a lot better sense then. So, I ask again...

What pisses you off about the current 28x picaxe board and what would you want if you could have anything?

Note:

Embed Audio Signals?

So I got this nifty iPod plugged into Walter and I can easily control it with serial commands. If I were to want to sync say, movements of the head to the audio being played, I now can only do it manually... I.e. I would actually use a stopwatch and time when I would want each move to start/ continue and add the needed pauses to the code.

Sharps, Sonar and a dead horse...

This is a dead horse, but...

Again, I am still sick of my sharp sensors. I am looking at  the LV-Max-Sonar(s) EZ(x) sensors as an upgrade... These are the "single-eye" sorta sonar sensors.

Open Question:

Has anyone played with these? Plus and minus for the output options (serial, an., pulse)? Is there clean data?  Etc. Etc.

Gimmie what you got.

Line follow sensor spacing ??

I am a bit embarassed to be asking this but... With everything I have done with Walter, I have never played with a line-follow set up. Now, the electronics I have down solid but I am a little fuzzy on the theory of opperation. I intend to use 4 sensors. Where do they go?

 

How to click a relay with a low signal?

I need to click a relay when a signal goes low. I have a couple relays on Walter, but they all click when signal goes high. These are pretty straight-forward, just a simple 5v relay, and a 2n222 NPN transistor to click it when a data-level signal goes high. --No Problem

Little circuit help with volt reg.

I am using designing a new PCB for a tidy way of connecting all my 5v doo-dads. It is a pretty basic set-up, 5v- 3a low dropout reg, the obvious caps and some nifty screw terminals. This is all pretty straight forward. Now I also need 3v to replace the (2) AA's in walter's mini ampified speakers. Would it be cool to just use a resistor bridge on this same 5v regulator board to get my 3v?