Home
JAQForum Ver 24.01
Log In or Join  
Active Topics
Local Time 01:40 16 Jul 2025 Privacy Policy
Jump to

Notice. New forum software under development. It's going to miss a few functions and look a bit ugly for a while, but I'm working on it full time now as the old forum was too unstable. Couple days, all good. If you notice any issues, please contact me.

Forum Index : Microcontroller and PC projects : Micromite LCD backpack

Author Message
Herry

Senior Member

Joined: 31/05/2014
Location: Australia
Posts: 261
Posted: 09:46am 27 Feb 2016
Copy link to clipboard 
Print this post

I am building this unit featured in Silicon Chip February 2016, using the SC kit. The two 100 nf ceramics are OK, but the two 10 mfd (at the regulator)and one 47 mfd (on pin 20) capacitors are shown with polarity on the PCB, but on the tiny SMD capacitors supplied, no polarity marks appear to be visible.
Senior?!  Whatever it says, I'm a complete and utter beginner...
 
palcal

Guru

Joined: 12/10/2011
Location: Australia
Posts: 1989
Posted: 11:43am 27 Feb 2016
Copy link to clipboard 
Print this post

Hi Herry,
The caps should have a stripe across one end, sometimes it is hard to
see, the stripe end is +
Paul.
"It is better to be ignorant and ask a stupid question than to be plain Stupid and not ask at all"
 
Herry

Senior Member

Joined: 31/05/2014
Location: Australia
Posts: 261
Posted: 12:52pm 27 Feb 2016
Copy link to clipboard 
Print this post

  palcal said   Hi Herry,
The caps should have a stripe across one end, sometimes it is hard to
see, the stripe end is +
Paul.


Thanks for the reply, but there is quite definitely no stripe. On the other hand the text mentions that multilayer ceramics may be supplied if SMDs and of course these are not polarised. Further thoughts from anyone??
Senior?!  Whatever it says, I'm a complete and utter beginner...
 
twofingers

Guru

Joined: 02/06/2014
Location: Germany
Posts: 1577
Posted: 03:22pm 27 Feb 2016
Copy link to clipboard 
Print this post

Hi Herry,

maybe (!) this are ceramics and you don't need to care about polarity.
I'm confident of that! Just try!

Regards
Michael
causality ≠ correlation ≠ coincidence
 
bigmik

Guru

Joined: 20/06/2011
Location: Australia
Posts: 2949
Posted: 06:00pm 27 Feb 2016
Copy link to clipboard 
Print this post

Hi Herry,

I would assume (I know I shouldnt do that) that these are most likely ceramic which do not need to be polarised..

Generally Polarised Caps are Tantalum and these are mostly YELLOW or BLACK in colour but the case is always some sort of plastic. If they are Ceramics these are generally a Brown to greyish colour and not plastic but the ceramic itself.

If unsure try to post a clear picture up on TBS and we will check for you.

Kind Regards,

Mick
Mick's uMite Stuff can be found >>> HERE (Kindly hosted by Dontronics) <<<
 
disco4now

Guru

Joined: 18/12/2014
Location: Australia
Posts: 1000
Posted: 06:01pm 27 Feb 2016
Copy link to clipboard 
Print this post

Note from Silicon Chip article.

  Quote  Note that the 10uF and 47uF capacitors are polarised. (the longer lead is the positive)


Regards
Gerry

Cancel that, I see you have SMD , no legs!Edited by disco4now 2016-02-29
Latest F4 Latest H7 FotS
 
Herry

Senior Member

Joined: 31/05/2014
Location: Australia
Posts: 261
Posted: 05:14pm 29 Feb 2016
Copy link to clipboard 
Print this post

Thanks all. I thought I had set the notifications to 'email me' but apparently not. Have just seen these. Unit working AOK.
Senior?!  Whatever it says, I'm a complete and utter beginner...
 
Print this page


To reply to this topic, you need to log in.

The Back Shed's forum code is written, and hosted, in Australia.
© JAQ Software 2025