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westfw

  • Date JoinedMar 9, 2006
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Orangeboard

Thank you very much for the Eagle Instructables. I've been wanting to make my own PCBs for a while now.
Can you help me place the parts for the board itself for this circuit? Here is the .sch. 


NurseQuacky.png
westfw (author)  blinkyblinky2 years ago
Sigh. Here's approximately what I did:
1) Add "pins" for the various nets that went nowhere (input, output, power?) 2) renumber the Rs and Cs to (roughly) identify which part of the circuit they go with, so it's easier to see on the PCB.
3) create the PCB, put the pots on there to indicate a rough size, move the components onto the board in groups similar to those derive in (2), in ways that sort-of minimized the length of the ratsnest lines.
4) Draw a gnd (PE in your case) net around the outside, and orient all the components that connect to GND on one side so that that side would be near the outside of the board.  Connect those grounds, sort of radially.  See if there's some obvious manual routing.
5) good time to SAVE.
6) run the autorouter in single-layer mode.  See which signals seem especially convoluted, and see if it looks like it would get better if those were moved somewhere else on the board, or re-oriented.  Undo the routing and actually do the moves (hey, you can UNDO autorouting in 6.0!  Cool!)
7) Repeat (6) until things look pretty good.
8) Make minor movements that look like they'll make things "prettier."
9) Add gnd polygon.
that's probably about as much as I'll do without knowing how real the component sizes are (whether the Pots are actually mounted on the pcb, etc), or what the other limitations are, or etc.  I suspect that the circuit could fit on a (cheap) 50mm*50mm PCB without too much trouble.
(can I not add zip attachments to my own orangeBoard?  Hmmph!)
https://docs.google.com/open?id=0B6dMB5dovDUZNjk2Y2E4NzUtNjdlMy00MjMxLWIxZmItY2JhNmU3YTM4NGU3
How do you "Add "pins" for the various nets that went nowhere (input, output, power?)" ?

Thanks.
westfw (author)  blinkyblinky2 years ago
I have a library part that I call a "wire" that becomes a single pad (with various different hole sizes) on the PCB. But you could also use the "PINHD-1X1" part form the standard EAGLE "pinhead" library.
I thank you a lot. I am thrilled because the EAGLE expert helped me design this board.(I made a few modifications in order to fit my needs.) One more question, how do I get rid of the words when printing and labels (silkscreen)? I need to print the board itself now. Thanks X a million.
quackpad board.png
westfw (author)  blinkyblinky2 years ago
To get rid of the labels, go to the "layers" button (just below the "i" info button), and deselect the silkscreen layers (tPlace, tNames, tDocu)
westfw (author)  blinkyblinky2 years ago
It'll take at least a bit. I'm not running 6.0 yet.
Thank you so much.
I have 5.11if you want.
comodore4 years ago
Can I please ask you a question about the Arduino? Thank you!
westfw (author)  comodore4 years ago
> Can I please ask you a question about the Arduino? Yes. ??
comodore westfw4 years ago
Let me describe to you what I need to do and than I will ask the question. I need to make a motor turn on for a certain period of time, for example 3 seconds, when the sensor is tripped, in this case a light sensor, LDR or some other... I was thinking of using an Arduino, to program it to do the above. The problem is that the Arduino is to big to fit in the case I need it to fit. Can the chip be removed and used just like that, maybe just put on a crystal... How do I know which pins of the chip, ATmega, or what ever it is called are for the sensor, power, motor... How to hock that all up??? Thank you!
westfw (author)  comodore4 years ago
Yes, you can move the CPU from an full-sized arduino into a smaller board. (subject of an upcoming instructable, probably.) You generally need a few extra components (like the crystal.) Your best bet as a beginner would be to buy one of the reduced-sized arduino-compatibles, like the Modern Device Company "Really Bare Bones Board"

The arduino environment designates some of the pins as "analog" for connecting to sensors, and some as "digital" like turning on a motor. You probably need some sort of motor driver (chip, transistor, or relay) as well. There should be lots of info on the arduino site:
Light Sensors
Motor Control (most of these examples are probably more complex than you need.)
comodore westfw4 years ago
Thank you! Could I use my Arduino Duemilanove to realize this or do I need the smaller one? The ting is I need this to be as small as possible, the circuit I mean, 3cm x 3cm x 1,5cm would be great! is this possible with the arduino chip and all the components it needs or do I have to look for another programable chip? Thank you!
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