Gallery, Projects and General > Neat Stuff
Micro DRO made from tyre tread depth gauge
BillTodd:
--- Quote from: kd0afk on October 17, 2012, 12:34:56 AM ---I have looked at some of the schematics and plans for a computer interface for these gauges and part of it is increasing the frequency or something like that so that it reads quicker.
--- End quote ---
Some of the early types had a fast and slow read speed (usually 100-200mS for improved precision & 30-50mS for easy adjustment ). For use with my DRO I had to switch them to fast read mode (which is a right royal PITA for a little PIC)
Most of new ones read a little faster at one fixed speed (they don't have the high speed option at all).
--- Quote ---Couldn't a person also increase the precision electronically?
--- End quote ---
Not with the newer ones, they output a BCD signal that is essentially what is displayed on the screen. With the older 24 bit binary versions it might be possible to filter (average) the data but it would make the reading speed too slow for use as a DRO
Bill
kd0afk:
I also noticed that if you turn it off, not only does it remember the last possition it will automatically come on when you move the slide. And if you remove the data port cover reveals the copper traces and what looks like power contacts.
BillTodd:
--- Quote from: kd0afk on October 19, 2012, 05:03:23 PM ---I also noticed that if you turn it off, not only does it remember the last possition it will automatically come on when you move the slide. And if you remove the data port cover reveals the copper traces and what looks like power contacts.
--- End quote ---
They don't actually turn off, they just blank the display (to prevent damage the the LCD with a static display)
Bill
stirling lad:
just my luck...Santa brought me one of theses gauges...
... and its only 1.5 v.. :doh:.......(the black one)...
So is this one going to be to slow then.? :(
..mike..
alias= lucky ace macwinnin
BillTodd:
--- Quote from: stirling lad on December 25, 2012, 09:43:29 PM ---just my luck...Santa brought me one of theses gauges...
... and its only 1.5 v.. :doh:.......(the black one)...
So is this one going to be to slow then.? :(
..mike..
alias= lucky ace macwinnin
--- End quote ---
Too slow ?
Not necessarily, the 3v lithium cell should last a bit longer than the alkaline, type but internally they all appear to run at 1.5v. - Push the thing in and out a few times and ask yourself 'does the display keep up with the movement?' - The two cheap ones I have here seem to be OK.
Bill
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version