Pages: [1]   Go Down
Author Topic: Need a verified source for atmega chips and 32.768kHz crystals  (Read 818 times)
0 Members and 1 Guest are viewing this topic.
Offline Offline
Newbie
*
Karma: 0
Posts: 28
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

I am working on a project that requires the use of asynchronous timers using Atmega 328 chips, but none of the chips I have seem to work correctly, and I dont know why. I am guessing that my chips are just somehow not working right

So I need a verified good source of Atmega 328 chips that support the use of internal oscillators and if you have done it, asynchronous timer mode.

Also needing a good source of 32.768 kHz crystals that work. I currently have a few from digikey, but IDK if they are all good.

US vendors are great, but if shipping is fast I dont mind going international.

THANKS!
Logged

Anaheim CA.
Offline Offline
Faraday Member
**
Karma: 44
Posts: 2808
...
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

I have about 20 12.5pF 32.768 watch (DS1307) crystals... Be Happy to sell 10 or 15 of them  @ 50 - 75 cents each... Email Me... I'm in So Cal...

Bob
Logged

--> WA7EMS <--
“The solution of every problem is another problem.” -Johann Wolfgang von Goethe
I do answer technical questions PM'd to me with whatever is in my clipboard

Global Moderator
Boston area, metrowest
Offline Offline
Brattain Member
*****
Karma: 437
Posts: 23662
Author of "Arduino for Teens". Available for Design & Build services. Now with Unlimited Eagle board sizes!
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

Are you sure you have the fuses set correctly for using the crystal?
I don't know what's needed, but that could be the issue.
Logged

Designing & building electrical circuits for over 25 years. Check out the ATMega1284P based Bobuino and other '328P & '1284P creations & offerings at  www.crossroadsfencing.com/BobuinoRev17.
Arduino for Teens available at Amazon.com.

Manchester (England England)
Online Online
Brattain Member
*****
Karma: 508
Posts: 31390
Solder is electric glue
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

Digikey is a reputable vendor, they don't sel rubbish. I suspect you are doing something wrong.
Try some of the timer tutorials as they work.
Logged

Offline Offline
Newbie
*
Karma: 0
Posts: 28
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

I have tried just about every tutorial, help page, info page, or other information regarding this. I even asked here and Nick Gammon wrote me some verified code. I got nothing. At all. Somethings up, and I want to make sure it isnt me.... smiley
Logged

Idaho, US
Offline Offline
God Member
*****
Karma: 19
Posts: 859
Special User
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Did you read my thread? Worked for me with atmega328p in pdip from digikey:

 http://arduino.cc/forum/index.php/topic,124879.0.html
Logged

Offline Offline
God Member
*****
Karma: 21
Posts: 650
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

By what method are you trying program the chips -- usart (tx/rx) or spi (icsp)?

Have you set your fuses correctly for what you are trying to do? (I notice you didn't answer Crossroad's question.) If your fuses aren't set correctly, you'll be going nowhere fast.

If you are trying to program by usart, have you uploaded the correct bootloader?

Saying "I've read everything out there" isn't very helpful for people trying to figure out how to help you. Tell us exactly what steps you've taken, in order.
« Last Edit: October 09, 2012, 05:51:07 am by pico » Logged

WiFi shields/Yun too expensive? Embeddedcoolness.com is now selling the RFXduino nRF24L01+ <-> TCP/IP Linux gateway: Simpler, more affordable, and even more powerful wireless Internet connectivity for *all* your Arduino projects! (nRF24L01+ shield and dev board kits available too.)

Offline Offline
Edison Member
*
Karma: 116
Posts: 2205
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Quote
but none of the chips I have seem to work correctly, and I dont know why.

Your code, your set-up, etc. It is unlikely that the chips are bad.

As to a verified source: I would go with any reputable distributor or a local shop. Some stranger off the internet hardly count as a "verified source".
Logged

Pages: [1]   Go Up
Jump to: