开云体育

Here's some tidbits to chew on for home brewing your own PCBs "caveman" style.... without the aid of
the complicated CAD....? (C)omputer (A)ided? (D)esign ? software.
Take this for what its worth for you.....?? I make no claims to fame here.... just massive success.. again and again and again... for me and my tinkering with building
radios and other electronic toys from scratch without suffering through the indiginities of breadboard or loose wires or crazy glue pads failing to work then chasing tail for a week.
It always starts with a schematic.
so.....
I simply take a picture of the schematic and open it in GIMP image editer....?? learn here if you don't know it:
These images came from :
and then simply trace all of the thin lines with a fat black ink pen tool and
add donut holes for all components and draw the components in red or purple
and move things around enough to accomodate physical parts connections.
AND ALWAYS LAY PARTs DOWN.... never have resistors or diodes standing on one end.
Laying parts down uses more space but it makes it much easier for kids and newbies to
succesfully build a radio.
AND
laying parts down create HUGE pathways on the copper side of the board to accomodate
trace routing without being screwed by tight spacing.
and then I remove everything ... just erase all the text and purple and have toner transfer ready artwork.
This is one the the most simple examples I share because it is a $5 short wave receiver
that has been made all over the world... because it is so simple to reproduce succesfully.
I few modifications later....?????? and final outcome was this:
On 07/26/2020 10:24 PM, Charlie Hansen wrote:

And then there's fun of solving a "puzzle" with the routing of the
traces, avoiding "ground loops", noisy power traces, etc etc.? I too
haven't used Eagle etc, but I DO like to use a simple CAD like
Micrographics Designer V3x
Charlie

And then

there's all sorts of CAD programmer to help you... but you may not
need CAD.

I have made more than 100 PCBs and I have not yet used ANY EAGLE
or any other CAD program.


Rob

















On 07/25/2020 09:30 PM, Harvey White wrote:

Nope.? Don't do videos.

Now questions:

1) designing what?? Digital?? Analog?? RF?

2) what level of complexity?? Do you need 1 layer, 2 layer, or 4
layer boards?

3) do you intend to produce these boards yourself? (it makes a
difference in how you design them).

4) how big are they (can make a difference in either cost/who
makes it or design/what program you use)?

5) what program do you use?

6) have you any experience with PC board design?

7) what level of hardware debug do you want to put into the
boards (test points?? test pads?? logic analyzer breakouts?
ground posts?)

8) what kind of facilities do you have to make PC boards?

9) have you done any of this before?

10) what level (roughly) in electronics design are you
comfortable with?? beginner?? what?


All of these things have a bearing on *how* you design something,
what design you come up with, how many copies you'll need before
you get one that works (know that one.....), and whether or not
you can make the board yourself.

I know this may sound complicated, but answers to some of these
help others to gauge where you are in experience, and what you
need to know (IMHO, of course).

For me: (roughly)

1) designing:? Digital,? Analog.? Have done 100 pin flatpacks.
(self built), do 144 pin flatpacks when someone else builds them).

2) I do double sided, plated through holes, silk screen, but
that's not me making them.? Have done toner transfer, 10 mil
trace, 10 mil spacing, double sided, wire stitch top and bottom
layers, tin/lead plated boards.

3) do you intend to produce these boards yourself? (it makes a
difference in how you design them).

4) no bigger than 100 cm * 100 cm because of the board house
limitations for cheap?

5) EAGLE 7.7, hobby (6 x 4 inch) license, can't sell the boards.?

6) by this time?? a fair amount, can always learn more

7) logic analyzer breakouts for digital, pin headers for some
signals, some test pads, ground connectors, monitor leds

8) used to make double sided boards, not plated through, designs
got too complicated for me to make

9) lots

10) not beginner in digital, some analog, power supply

Other people will have different opinions.


Harvey


On 7/12/2020 12:59 AM, davethetechman via groups.io wrote:

Hi, does anyone have any personal videos of designing with their
own personal tips and hacks?

Recently new to this.

Thanks