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GreekPIC
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Posts posted by GreekPIC
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Do you know where I can find them? Online source prefferably.
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Any answers?
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Ok, thanks. Next time I canibalize a CD-ROM I'll be more carefull...
How yould a circuit that uses the photodiode look like? -
I used the first. It's not a disaster if I burnt it, I'm just trying to understand lasers. How can it give light if it's burned? Can the "simple LED action" the guy describe be on if it's burned?
Nikolas -
So, I had this laser diode from a CD-ROM, with the help of this site:
http://members.misty.com/don/laserdio.htm#diodct2
I was able to find the pinout. I powered it using this schematic:
http://members.misty.com/don/laserdio.htm#diodct3
I pointed the beam to the wall and looked through my NVG. I saw an illuminated circle (dimmer than an IR LED can provide) and it was short of "stripped", illuminated and dark lines.
I read in that page:
For a current below the lasing threshold for your laser diode, there will be some emission due to simple LED action.
I guess that's what happening, I need more current? -
Thanks guys
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So I can use an IR emitter instead of a IR LED?
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I've seen IR emmiters for remote controls, what's their difference from ordinary IR LEDs? Narrower beam angle?
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Hi GreekPIC, thanks for your reply :)
Well that's a shame :(, I was hoping that this old 386 I was trying to get going, would do the job ;D.
Maybe it will be good enough, for playing around with a prototype, to get familiar with the whole process.
Why don't you try this:
http://www.deskam.com/deskncrt.html
Requires:
MSDOS 3.3 or Higher -
Sorry, I meant visible with night vision equipment, I want to use the IR LEDs.
I like the 2+2 alternating LEDs design, I think this is what I'll do.
Thanks,
Nikolas -
Thanks Audioguru. Oops! I forgot to say I use a 9V battery.
So for 4 leds (I want to place them at right angles so they're visible 360 -
Ok, guys, I made the attached circuit and is working.
I substituted the red LED with an IR one and it's still working. Should I change anything? Am I pushing the IR too much or on the contrary not getting all I can out of it?
If I want to use 4 LEDs I guess I should change the 1K resistor, right? To what?
Thanks,
Nikolas
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Trigger the header writes:
PCB FILE 9 VERSION 2.70
I found the site where I downloaded it from and in other projects this guy says he used Protel. So I guess it might be the same.
Is there any free demo of Protel?
Thanks, Nikolas -
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What's the ratio? Maybe the program in which you make the *.hpgl is using the wrong units. Are you using inches or mm? Can you set a dafault in either program?
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I use TurboCNC and it doesn't support HPGL, only G-code.
Have you checked your scale settings in Kcam? There's got to be a way to set that 1 step=...mm (or in). -
Trolex I've only made the board in Postcript format. I haven't milled any boards yet, I'm still tweaking the desing and handwriting G-code. I etched the board the old fashion way...
Nikolas -
I have a zipped project (can't remember where I found it) with the boards in *.pcb format. Which program opens them? Any way I can import them into Eagle?
Nikolas -
SmartKit usually includes deliberate errors in their schematics. If you buy the kit everything is ok. If you try to make it from the schematic, no joy...
I don't know why the schematic in the project wasn't corrected and why my post doesn't show with a site search.
Do you mean this one:
http://www.electronics-lab.com/forum/index.php?board=2;action=display;threadid=2488;start=1#msg15286 -
What country? Do you have DigiKey?
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Maybe a linear or angular position encoder. Print a binary patern and read the position with the CCD converting the binary value to decimal.
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RobiD, have you checked the board without the motors? Do the UCN outputs sequence when there is a step pulsetrain?
Hi
Can anyone tell me, what would be the minimum system (computer system) needed to reliably run this project?
I understand that it would also depend on the software that you want to use as well.
Yes, it depends heavily on the software. TutboCNC works on DOS and a 486 will do. Mach 2 needs XP so the PC must comply... -
Hi
this is the sort of thing I was thinking of, a Fairchild 2048x1 pixel sensor. -
Well, not much of a picture but it's quite simple
Potentiometers with center detent?
in Datasheet/Parts requests
Posted
I've already done that. I got 3 slide pots with center detent from a busted stereo but I need rotary ones. I got one out of an old 14" monitor but need 3 more...
I don't want to start dismandling working appliances... ;)