Those days...

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racemaniac
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Those days...

Postby racemaniac » Sun Nov 20, 2016 8:59 am

I assume you guys also have "those days" when working on a project and everything that can go wrong.... goes wrong >_<...
I resumed my lightsaber project, and spent a day assembling a little module for it, what happened when doing that:
- at first the breadboard setup didn't work, because the I2C dac i used now had a different address than the ones i used previously (took me a while to figure out because it's a big project and didn't know what was failing where >_<. at first i was afraid something went wrong with my recent arduino IDE & stm32duino files upgrade)
Then when soldering
- switched the MISO & MOSI ports on the sd card module -> desolder it & put it on correctly again (and a second spi module that was piggybacking on it too ofcourse -_-)
- Switched the 2 i2c devices, which i didn't think would be a problem, untill everything kept crashing and after some debugging... i realised that i2c2 & spi2 are on the same DMA channels soo..... desolder both i2c modules, and switch them around -_-....
- Then it was still hanging, after looking closely i suddenly saw one of the wires of the spi flash chip had come loose >_< (why would the soldering be bad after having to desolder & resolder basically everything on this project? XD)

but somehow everything survived that abuse and by the end of the day i had a working module XD.

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ahull
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Re: Those days...

Postby ahull » Sun Nov 20, 2016 12:05 pm

I'm impressed that after all the rework, no magic smoke escaped. :D
- Andy Hull -

racemaniac
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Re: Those days...

Postby racemaniac » Sun Nov 20, 2016 4:15 pm

ahull wrote:I'm impressed that after all the rework, no magic smoke escaped. :D

I'm also impressed by the quality of the maple mini board (and the modules i used). it's all cheap stuff, but i didn't even ruin one single pad on the boards, and everything is still working :). Somewhere the god of electronics still had some mercy on me it seems XD.

racemaniac
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Re: Those days...

Postby racemaniac » Sun Dec 11, 2016 4:32 pm

Encountered another nice challenge yesterday: had a small tssop10 DAC chip i wanted to experiment with, and wanted to solder it on a tssop -> dip adapter board to play around with it. But when i started i noticed the pins were closer together than the pads on the adapter board... After some googling i found out it's a tssop chip with the pins spaced 0.5mm apart, instead of the regular 0.65mm -_-.
don't know if there are adapters to be found for such chips, but i now solved it by bending the pins a bit wider with a knife, and then soldering it XD.
It took me 2 tries, but it worked XD.

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mrburnette
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Re: Those days...

Postby mrburnette » Sun Dec 11, 2016 5:20 pm

don't know if there are adapters to be found for such chips, but i now solved it by bending the pins a bit wider with a knife, and then soldering it XD.
It took me 2 tries, but it worked XD.


Seriously? Why? Nevermind ... I'm sure I would not understand.
Enjoy your agility while you are young. These days, I can barely see the legs on the IC and I rely upon 10x magnifier to solder chips properly to a board. I can do SMT with hot-air but I gave up point-point component wiring somewhere around 14 when I built my Allied RadioKnight Kit superhet shortwave.

"... bending the pins ... " that just hurts. :o


Ray

racemaniac
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Re: Those days...

Postby racemaniac » Sun Dec 11, 2016 5:28 pm

mrburnette wrote:
don't know if there are adapters to be found for such chips, but i now solved it by bending the pins a bit wider with a knife, and then soldering it XD.
It took me 2 tries, but it worked XD.


Seriously? Why? Nevermind ... I'm sure I would not understand.
Enjoy your agility while you are young. These days, I can barely see the legs on the IC and I rely upon 10x magnifier to solder chips properly to a board. I can do SMT with hot-air but I gave up point-point component wiring somewhere around 14 when I built my Allied RadioKnight Kit superhet shortwave.

"... bending the pins ... " that just hurts. :o


Ray

it was bending the pins, or not have a way to experiment with that chip :p.
but now i found some adapters with 0.5mm spacing, so i ordered some, the next time i'll be able to solder them normally XD.
and i also used a magnifier glass, my eyes are very good, but pins 0.5mm apart are just madness to do without a magnifier XD.
i wish there were DIP variants of all IC's, but when you get to more specialized ic's... it's all smd it seems -_-. ah well, my soldering is getting better and better doing crazy things like that :p.

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mrburnette
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Re: Those days...

Postby mrburnette » Mon Dec 12, 2016 3:09 am

i wish there were DIP variants of all IC's, but when you get to more specialized ic's... it's all smd it seems -_-. ah well, my soldering is getting better and better doing crazy things like that :p.


Sand is cheap, plated metal pins and extra sized chip package are not so ... DIP makes little sense in today's mass-market, high volume production fabs. We hobbyists are enjoying out heydays now because of inexpensive production costs and "left over component reels" from large runs in China (and elsewhere.). Let's enjoy this while we can - political forces are assembling as a dark cloud on the horizon and tariffs may again make hobby parts unbearably expensive or simply not available.

Ray

Image

racemaniac
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Re: Those days...

Postby racemaniac » Mon Dec 12, 2016 9:35 am

mrburnette wrote:Image

If i ever start doing something like that, i hope someone comes to whack me on the head to make me stop & realise i've gone insane XD.

zmemw16
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Re: Those days...

Postby zmemw16 » Mon Dec 12, 2016 11:01 am

purl one, knit one, missed one.

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ahull
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Re: Those days...

Postby ahull » Mon Dec 12, 2016 5:22 pm

zmemw16 wrote:purl one, knit one, missed one.


Why didn't I think of that?... Shredded wheat and superglue..

Image

So much easier than soldering.. :P
- Andy Hull -


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