+15 volt on +5 volt and visa versa mistake

ikke wrote:Don't stress to begin with and take your time!
I would leave the IC's how they are and only desolder them if you're sure that they're damaged because
damaging the boards (lifting pads or traces) is easily done even by the more/most experienced DIYer...
Ordering parts is a pity so just order everything you need in one time but ordering parts on a regular base is
quite common in the DIY scene to be honest.

There are several ways to test an eletrolytic capacitor but it's better to do a search on the net so
it becomes more clear for you to understand ''how to'' in your own language.

I'm curious if your 5 Volt rail is still stabile and if the IC's in the sequencer still get 5Volt?
Looking at the pics... I would give the 165's and 595's a better inspection judging the solder joints.

Thanks! Besides the cap. Do you have a clue where i can find out which pins of the IC's get 5 volt? Oh wait i'll check the yocto schedules

Also what do you mean with inspection? Retouch all the solder joints of all the sequencer IC's?

Also what do you mean with inspection? Retouch all the solder joints of all the sequencer IC's?

Some pins don't look very well soldered.

Do you have a clue where i can find out which pins of the IC's get 5 volt?

For the 165's and 595's:

pin8 = ground

pin16 = 5Volt

ikke wrote:
Also what do you mean with inspection? Retouch all the solder joints of all the sequencer IC's?
Some pins don't look very well soldered.

Do you have a clue where i can find out which pins of the IC's get 5 volt?
For the 165's and 595's:

pin8 = ground

pin16 = 5Volt

Thanks!

All IC's have 4.95 volt on pin 16!

And with not soldered you mean on IC side right? I've retouched them all again but i don't see what you mean precisely

And with not soldered you mean on IC side right? I've retouched them all again but i don't see what you mean precisely

Yes!
Have a look at your first picture with IC4 on it... do you see what i mean when you look at pin 9,13 and 15 for example?
The same goes for IC 2,3 and 7...

ikke wrote:
And with not soldered you mean on IC side right? I've retouched them all again but i don't see what you mean precisely
Yes!
Have a look at your first picture with IC4 on it... do you see what i mean when you look at pin 9,13 and 15 for example?
The same goes for IC 2,3 and 7...

Thanks! But i've retouched all these pins for the 5th time now and it still stays the same. I think it's because the pins are pressed to that side of the hole so the solder has no place to crawl through. But on the back of the pin the hole is filled i think. I even pressed the pin the other way when i retouched it with solder.

Also i don't want to solder on the side of the ic's.

Okay, that's fine. You only heat the solder side anyway!

Sometimes the solder doesn't flow well indeed but I was judging by the pictures...

I understand

What do you think I should check next?

Well... component switching is out of the question here because you didn't use sockets for the 165's and 595's and
I wouldn't recommend it either, I think that would be a last resort.

You could have a look at the wiring of JP4 and if the optocoupler IC4 are fine.

After that, you've checked all possibilities and only have the atmel IC1 left that might causes the issue here.

Not sure what will be wrong with it...

I accidentally shorted +15 to the +5 rail (or the spi clock line).
Had to change most 595s and 165s aswell as the atmega1284.

There was a couple of the 595s and 165s that shorted to ground and i could measure resistance across the pcb to more or less pinpoint which ones.
The atmega1284 was just weird. It worked but did not send out spi clock to the other ics.

ikke wrote:Well... component switching is out of the question here because you didn't use sockets for the 165's and 595's and
I wouldn't recommend it either, I think that would be a last resort.

You could have a look at the wiring of JP4 and if the optocoupler IC4 are fine.

After that, you've checked all possibilities and only have the atmel IC1 left that might causes the issue here.

Not sure what will be wrong with it...

Thanks! I will check when i'm next to my yocto again.

If the 165's and 595's are cheap i will order those and sockets too. Together with that cap. I must order other stuff for another project anyway.

I checked prices of the 165's and 595's at farnell and they aren't expensive so that's nice

Also the Atmega1284P can't be ordered from the e-clicktronic site

http://www.e-licktronic.com/en/ics/48-atmega1284p.html