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Dumb, expensive mistake


#1

A picture is worth a thousand self-lashings of agony and pain, right?


#2

Yea next time print out the PCB designs on paper, and test that the components line up with the holes.


#3

Super glue and hookup wire = golden :grin:


#4

Didn’t have the headers at the time, ordered parts after I sent the board off for mfg.


#5

Yeah that’ll be the test method. These are just prototypes anyway. I did worse hack jobs on my last board, scraping traces to install a pullup resistor I didn’t place pads for… Totally forgot one on the SD card.


#6

Actually I’ll probably skip it and just hard solder the sensors in. Those are all analog to a G30. Was going to use them for thermostats.

The headers are pricey and I’d rather not waste the components on a screwed up prototype, lol.


#7

shit happens :slight_smile:


#8

but seriously, how expensive was it? Ignore lost time, because you don’t have a real customer deadline, what did it cost you - an hour to write this post and revise the PCB, and a respin of $x. Depending on who you use for PCBs, that could also be not that long before the new rev will sit on your desk so you can find the next messed-up bit :slight_smile:


#9

Yeah it could be worse. I’m just wishing I hadn’t ordered 10 of the dang things. Most are now destined to become 4x4" 4-layer coasters. :slight_smile:


#10

they add credibility - when customers see you have PCBs as coasters, they’ll be like whoa, he’s serious about this 'lectronics stuff


#11

So not only did I get the Y axis spacing wrong (7.62 instead of 10.16), I also got the staggered rows backwards, AND I didn’t space them correctly on the board.

Spacing should be .2 between; moved one down to illustrate

At least I didn’t order 10 more of the ones I designed for the G80, it has the same mistake, since it pulls off the same library entry I created.


#12

On the bright side this will let me reclaim some space on the front (left edge) of the board which will let me move some back-side components on to the front. I might be able to clear up room so I don’t have to use an under-board micro SD :slight_smile:

(I didn’t order a stencil for the reverse side components; figured on hand soldering it all)


#13

aw man, did you have to show the data sheet? Where did 7.62 come from? Now you just look like a goose

:wink:


#14

LOL My grandpa taught me I gotta own my mistakes man. Self-punishment is not fulfilled until you publicly humiliate yourself to drive in the lesson. :slight_smile:

I must have been thinking of rifle rounds that day. :sunglasses:


#15

Cost of the boards (x10, 4 layer, 4" x 4") were $171.

So yeah it was a relatively expensive mistake.

Or I can look at it as a lesson learned. I’ve had MUCH more expensive lessons than that. I mean, I do have an ex-wife and 6 kids. And, being a true masochist, I also drive a Ford. My life has been plum full of expensive decisions. :slight_smile:


#16

This is a prime example where a package like Altium where you add step models to your library parts catches issues like this.


#17

no dude, no. Where you look at the part and the datasheet and go, geez, 7.62, hmmm can’t see that written like anywhere hmm… That’s all ! :slight_smile:


#18

Datasheets sometimes lie, true… :blush:


#19

even if they lie, no step model will help unless someone has had the baptism of fire and fixed the library :slight_smile:


#20

Shouldn’t you be out mowing the lawns or something equally domestic now you are a house husband instead of being helpful? :joy: