wow, that already looks really awesome.

i thinking that it will need to be single sided. As the board will only have copper on one side, I think(?). not 100%

Do you need it single sided?  Any specific trace widths or clearances?

im not sure what you mean.

That would be easy to draw up in eagle

easy if you know how...
attached to the board:
- buzzer  (just a pc case piezo)
- pot (needs to be accessible from outside an enclosure, so maybe attached, maybe not?)
- 2x switch (needs to be accessible from outside an enclosure, so maybe attached, maybe not?)
- relay

the LSM303 need to be far away from the motor as it interferes. so not on the board.

i will need to use a different relay, the one i have is archaic and shit (suggestions?). the switches can be any momentary on push buttons.

im not 100% that my transistor set up is the best. It takes the relay to ground when the pin is HIGH. Ive used a BC548 to do it. But, it was my last one, and i stupidly hooked up the power backwards, now the smoke has fallen out. i have a more BC558 but i dont think they will work.

i think its one of these they have:
http://www.troteclaser.com/EN-US/LASER-MACHINES/MID-SIZE/Pages/Speedy300.aspx

someome else has already done it
http://halfbakedmaker.org/2012/05/16/printed-circuit-boards-with-a-laser/

more

some pics of the prototype

here is possibly the worst ever schematic u will ever see. im not too good at it as im sure you can tell...

If you have the power cranked up to etch through the copper then wont it cut through the PCB as it breaks through the copper?
   

Well, its sensitive enough to burn away 1 layer of paper. if you glue 3 or 4 different coloured pages together and design something on the computer it can take away one 2 3 or cut through all of them. the end effect is cool. anyway, point is, i think it will be ok. will find out when i try i suppose.

hi guys,

You will need an above-average laser cutter for that.

well ive seen this engraver in action. It mainly used for engraving stainless tags for electrical cables for mining companies. Its pretty big. costs bout $20000 for one, so not really economical for someone just to buy. but i know them through my job. Im actually the one who set it up for them originally. its pretty cool. im sure it wont have any issues cutting a thin layer of copper.

i dont have a schematic, ive got my working prototype. its just very messy and i want to tidy it up a bit. Ill post a photo of it and draw the schematic up tonight. im at work at the moment, so itll be a few hours.

Hi cleaver people of the forum.
I want to get a PCB made but all chemicals are processes to etch a board with laser printer and acid is a bit much for me. I have access to a laser cutter/engraver. so i was thinking if i could get someone to help me design it i can get it made pretty easily.

All we need to do is get it in a format that the laser machine reads. Ive done other stuff with it before. basically it just prints from Corel. Its in scale and it is set up as a printer via USB.
As for holes and what not, In the drawing, RED lines are for CUTTING and BLACK is for ENGRAVING. Engraving will remove the copper top off the board.

now, the hard part, i dont have a schematic. ive looked at eagle and its pretty hard. i could draw it on paper and scan and attach it so you can recommend what to do.

thanks
gr0p3r

yep. Check out my 360cities profile:

Code:

http://www.360cities.net/profile/gr0p3r

these are ones done prior to the compass module going in and it was just on a timer. but same thing.

Ive tried posting them here. Keeps on failing. Had put in a description and everything but its lot now.
The pictures are here: http://gr0p3r.wordpress.com/2012/06/22/arduinorama/

an video showing its functions is here:

Iva also attache my code in entirety in case it ever interests anyone.

yay! thanks so much Riva. its all working now. ill post pics if your interested in seeing what you helped troubleshoot?

do you think you could accomplish that by having the wheels a varying distance apart and varying some sort of friction on the free spinning one ?

Ive seen these sorts of things before.
Chr0sh is right, the wheels need to spin opposite directions. The one ive seen was for launching balls for softball practice. but it would be the same for tennis balls. One wheel is powered and the other is spun by that wheel (they touch) the wheels need to be pneumatic (like a wheelborrow or go-kart) and not pumped up hard. this allows the ball to be grabbed and sucked through and spat out.

There was a cage above it with a trap door to a wire tube that gravity fed the wheels.

the motor was a 240VAC belt drive to the wheel.

angle (and distance) can be adjusted by tilting the whole contraption.

hope this helps

Looks like it. Great thanks,

Ill change it when i get home and post the results.