robotmaker
Little while back someone made a post on home base finder ,and since it was so hard to find a good idea since there was many soloutions.
I decided to test one i found was very good thanks rgordon
First i put the circuit together and it worked very well
Second test is to use the arduino code to learn how it tracks
3RD test is to convert the arduino code to EZB
It uses 4 IR transmitter and receiver pairs ,like a compass it updates 1000 times per second as said on the pololu website
Alot faster then any camera or some other designs can do
here is a link about how it works
also you need a set of them, one on your robot and one on home base
pololu ir beacon transceiver pair
Also they work great in the dark,so no lighting is needed ,will have photos and data as i make it
its a simple voltage divider using 5 resistors at the same value,really the best circuit to use is D-A but like in my last post it wont be very fast updating ,thats what you really wont
TO make a D-A CIRCUIT will take a lot of parts,and each time a circuit is added to another circuit it slows it down.
I GUESS really need to read up on a A-D on how it works and design and the speed to fully understand it.
on D-A conversion is a voltage string depending on the bits and then a comparator for each bit and then a digital cicuit to convert it
@Robotmaker would the ic in link be suitable eventhough its an 8 bit input http://www.ti.com/lit/ds/symlink/dac0800.pdf
If one is not into schematics please you dont need to understand this is all in a single component and the cost is only a few $ or £ or ?
yes it will work,only will have less speed,and thats what you really need,it will be super slow,because of first goes to first D-A and then second A-D on ezb and all the conversion is done on both.
thinking you use ezb Analog will give about 2500 per second and then need to divide another by 4 again is 625 updates per second ,on the digital you get 10000 updates per second
Only reason that you want a very fast updating is because you want the robot to turn left or right to stay on track to the home base finder or it would wonder all over the place
IT same about using a camera to find GLYPH you need it very fast to update the servos
I DONT thing the camera can update as fast at 10000 updates per second
Thanks for that will test circuit like I said and willl post results Pat
DO you have a scope to test for the cycle updating speed
in that circuit you need a good reference circuit and op amp to convert non inverting and inverting inputs to analog output
look near the end of the pdf file you put up
RICH i think you click on the first link ,its the one that says POLOLU IR BEACON TRANCEIVER its the second link third one is pololu ir beacon tranceiver pair
@BRAVIA read this its current output not voltage output
The DAC0800 series are monolithic 8-bit high-speed 2. Fast Settling Output Current: 100 ns current-output digital-to-analog converters.
i and i didnt see it was that slow i thought it would be much higher ,might be cause it 8 bits or type of design 100ns witch is 100 nano per second
HERE is a site i use alot for very good info on docking logic ,finding home base and charging it alot of different ideas
docking logic
there are over 50 pages just to let you know,i did print all of it about 5 years ago
When i was really into the finding home base designs and testing all types
IR DOCKING DESIGNS
GO TO CHAPTER 3 on IR docking it talks about why a omnicone is so very important