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Re: Finished assembly, but not working..
Posted: May 5th, '14, 12:07
by 4teenth
Okay cool, just wondering where best to get a replacement from - Mouser is too expensive on postage..
Is this the right IC?
http://www.ebay.co.uk/itm/Texas-Instrum ... 19e7bb8533
This one is the same manufacturer:
http://www.ebay.co.uk/itm/NXP-74HC165N- ... 27d779f6a1
Cheers.
Re: Finished assembly, but not working..
Posted: May 7th, '14, 08:48
by e-licktronic
Dear 4teenth,
Any of these shift register will be fine.
Best regards,
e-licktronic
Re: Finished assembly, but not working..
Posted: May 7th, '14, 12:59
by 4teenth
Excellent just ordered a pair.
Re: Finished assembly, but not working..
Posted: May 12th, '14, 21:55
by 4teenth
Right...
So after a an absolute ordeal de-soldering IC2, I still have a non-working yocto...
Initially, I had just 1 LED lit, so tried holding 1,3,5 and switching it on, which ended with me having LEDs 1- 8 lit (with 9-16) flashing once briefly as I powered it on.
Now switching it on I have LEDs 1,2,4,6,7 and 8 Lit
What to try now?
Re: Finished assembly, but not working..
Posted: May 12th, '14, 22:11
by 4teenth
Left it a bit, and switched on with 1,3 and 5 pressed - back to all LEDs 1-8 lit....
Re: Finished assembly, but not working..
Posted: May 13th, '14, 09:01
by e-licktronic
Dear 4teenth,
-Your µC is working
-IC2 is new and well powered
-Switches are right connected and working
-IC2 is well connected to the µC
And you still can not access to the bootloader
I really think you need an extra board like arduino to debugg your Yocto. it will be a lot easier.
Best regards,
e-licktronic
Re: Finished assembly, but not working..
Posted: May 15th, '14, 15:28
by e-licktronic
Could you post a video of your Yocto trouble ?
Maybe i can see something to help you to solve this problem.
Best regards,
e-licktronic
Re: Finished assembly, but not working..
Posted: May 19th, '14, 09:54
by 4teenth
Yep, I'll get a video up for you tonight.
I'm going to run through the previous test procedure again now I have this new IC in, but is there a similar test to do on the uC?
I guess just check it's getting the correct voltage at relevant pins...
Re: Finished assembly, but not working..
Posted: May 20th, '14, 15:19
by e-licktronic
Dear 4teenth,
As you can not access the bootloader is that there will be a hardware problem (if you're sure that µC is working).
PM send
Best regards,
e-licktronic
Re: Finished assembly, but not working..
Posted: May 20th, '14, 21:20
by 4teenth
Video uploading now, just re-done the test for continuity from the buttons to IC2, and from IC2 to the uC, and making sure that the relevant pin is getting +5 when its button is pressed, all good there..
Just tested for voltages on the uC and got +5 at pins10 and 30, and continuity to ground at 11 and 31, so everything good there...