Here's the idea:
1) 3x5" single sided boards, I think about $5 each.
2) Circuit development software (I think you mentioned Eagle, free).
3) Sheet of Press-N-Peel Blue. I have 20 sheets that I will donate.
4) Laser printer or photocopier.
5) A laminator (one of the Vetco sales staff has one, just ask nicely...) or an old iron.
6) Big bottle of ferric chloride, about $15.
7) A small tray, in which to etch the boards.
8) Some way to collect all the toxic waste. OK, i don't think it's THAT toxic, but you shouldn't just go flushing it down the drain.
9) Chemically tin the traces? Vetco hs a tinning solution as well.
I'm off on a different tangent. Trying to take my homemade PCBs to the next level, using an Epson Artisan 50 printer and this: http://www.fullspectrumengineer..., and later maybe this: http://techref.massmind.org/tec....
0 · March 9
As to our next meetup, fabricating circuit boards, I have an idea. I don't have a circuit in mind, but for the fabrication process, I do.
If you host it with Vetco, they have both copper clad boards and etchant. Just chatting with the folks working and shopping there today brought up some interesting possibilities, yet I remain convinced that the best route for beginners is Press n Peel Blue, available here: http://www.techniks.com/.
Although I haven't tried it, I understand that best results are achieved using a laminator. I've always used an old iron, and the results are decent, after some number of tries.
Here's how it works: Print a mirror image of your circuit on a laser printer onto PnP blue, or photocopy it. The important part is the toner (which is why it's called toner transfer). Transfer the toner+stabilizer (which is embedded into the PnP sheet) to the bare copper. Etch it.
0 · March 9
Fun meet up, thanks, couldent put it down when I got home. I did get it going around in a semi square circle. As far as I can tell these steppers are fairly weak, and the battery pack we are dragging is causing a friction problem because the wheels are so slick. I put rubber bands around my wheels. With that and using the "DOUBLE" step type I got it moving on a smooth surface (core board). however it still can’t reliably do an in position turn (too much friction on the battery pack to move it sideways) so I'll move the battery pack to a position in-between the Adriano and the bot frame and add a small caster wheel on the back. That should put more weight down on the wheels 4 friction, and remove the battery pack drag effect. I also split the power out, (9v powering the arduino (between motors), battery pack powering motors. Note: Adafruit says this motor can do upwards of 80 RPM at 9v but im not getting even remotely near ½ that at ~6v so quite possibly still doing something wrong.
0 · March 9
Maker Alex asked the following question:
Hi, I signed up for the "Line Dance --- Maker Style" a week or two ago,. Count was just 15 with me,. But I see now there are 18 coming and only 15 kits,. So I just wanted to make sure that if I show up ill have a kit. I saw now its first come first serve,. Is that in order of show up on day, or order of sign up on the group?
Our rules for dividing up the kits run as follows:
1st priority - RSVP and say yes to a kit, then prepay. OK, I know, not fair as I didn't offer a way to prepay this time. Message me if you would like to do so.
2nd priority - RSVP and say yes to a kit, then show up with cash.
3rd priority - Show up with cash, and any un-purchased kits are up for grabs.
So far (as of Sat the 2nd), there are still 4 kits available, so all of you who requested one (or two) are sitting good with reservations.
0 · March 2