Sonsivri
 
*
Welcome, Guest. Please login or register.
Did you miss your activation email?
November 27, 2020, 06:10:04 06:10


Login with username, password and session length


Pages: [1] 2 3 4 5 6 7 8 ... 10
 1 
 on: Today at 03:15:15 AM 
Started by Poty - Last post by Poty
Good evening. I´m sorry for the delay, I got muted because someone thought I was another muted user getting a duplicate account.
Unfortunatelly, even on ADSL, in this place, connection cuts are more than common, and that means a change of IPs... probably I got one that other user used to annoy someone.

About the invitation, you´re very kind, Sideshow Bob.

Going back to the topic, I`ll use both suggestions. Fortunatelly, I don´t need to disconnect the sensor (it is a SMD one), just disconnect the PIC from the ZIF socket (no zip.. Undecided) and this will allow me to test it directly. Then, I`ll verify the bytes´ order, and let you know what I find.
Regards,

 2 
 on: Today at 01:56:24 AM 
Started by ekk - Last post by solutions
This member is invited by me. Registration isn't completed yet.


Note: This message sent by the system behalf of solutions.

 3 
 on: Today at 01:43:55 AM 
Started by Poty - Last post by solutions
Agree - pull the sensor out and inject a low noise DC level and read it with your code as a temperature. Do same for another voltage. And another.

 4 
 on: Yesterday at 03:07:06 PM 
Started by Poty - Last post by Sideshow Bob
Could it be it be that  the high on low byte in the conversion result are merged in the wrong order. This can give quite errattic readings that appear very wrong. Done something like this my self Wink You need to in some way trace the raw reading from the ADC(two bytes) and compare them to the input voltage

 5 
 on: Yesterday at 02:02:03 PM 
Started by Poty - Last post by Poty
Good morning (at least here). As my first post, I want to introduce me (briefly). My nick is Poty, I`m on GMT-3, and I work exclusively with PICs. English isn´t my mother language, but I try to do my best. Corrections on all this (PICs and language) will be acepted.

Anyway, to fulfill the subject, I have a test board with a ZIP socket, which allows me to connect up to 40 pins PICs. It is a nice piece of work, but I found a little failure. The temperature sensor is a TC1047A, SMD type mounted on the main board, which is not very useful, but to practical purposes, works. Its temperature range, is -40 to +125ºC, and its output, goes from 100 to 1750mV. Of course, I use ADC, and all the music to read it,(considering a lineal response, with a formula that considers offsets, etc, etc, etc).
Well, the problem is that I can´t get even an approximate value to the real temperature, and repeating lectures (ADC), gave me always different values.
It has not OP AMPS in the middle (connection is DIRECT to an ADC pin of the pic) so, there is no circuit in the middle that can modify the signal or so.
Repetitive lectures are realized every 3 seconds, time more than enough to correctly finish ADC each time.
As contrast, I used 2 different tools: a dedicated termometer with termocuples (I don´t remember the brand now) and a Brymen tester with a termocuple. Both instrumens gave me the same value, testing the TC1047A, while this one sent odd values to the processor.
Any suggestion?
Cheers.

 6 
 on: Yesterday at 01:09:32 PM 
Started by Poty - Last post by Poty
Thank you for invitation. Registration is done.



Note: This message sent by the system behalf of Poty.

 7 
 on: Yesterday at 12:38:25 PM 
Started by Poty - Last post by Sideshow Bob
This member is invited by me. Registration isn't completed yet.


Note: This message sent by the system behalf of Sideshow Bob.

 8 
 on: Yesterday at 11:39:56 AM 
Started by aj22r - Last post by aj22r
CountryEstonia
NoteI'm a microcontroller hobbyist and I've been working with all kinds of different MCUs for over 3 years.
I want to join to be able to download the XC8 patch from http://www.sonsivri.to/forum/index.php?topic=44014.msg129986#msg129986

 9 
 on: Yesterday at 10:45:51 AM 
Started by Poty - Last post by Poty
CountryArgentina
NoteAn eternal pic projects developer. some success, some failures, but always learning. I think I can help with a little C programming, an intermediate knowledge of PIC 12/16/18 families, and a nice mood. I was wandering on the forum, and found it helpful, for my work and developements.
Mine is becoming a work more and more every day.
Thanks in advance.

 10 
 on: Yesterday at 08:10:03 AM 
Started by Wizpic - Last post by Wizpic
How will you attack the digital current/voltage settings?

I shall be using 4 times MCP4725 as there easier to solder, then a TCP9548 to multiplex them and then using isolated 5v supply for the dac’s and will be using an SI8600 for the I2C bus

Pages: [1] 2 3 4 5 6 7 8 ... 10

DISCLAIMER
WE DONT HOST ANY ILLEGAL FILES ON THE SERVER
USE CONTACT US TO REPORT ILLEGAL FILES
ADMINISTRATORS CANNOT BE HELD RESPONSIBLE FOR USERS POSTS AND LINKS

... Copyright © 2003-2999 Sonsivri.to ...
Powered by SMF 1.1.18 | SMF © 2006-2009, Simple Machines LLC | HarzeM Dilber MC