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Recent content by kanchana 29

  1. K

    [SOLVED] Rf track width calculator

    characteristic impedance(Zo) of a microstrip line depends on: Substrate height (H) Dielectric constant of the substrate (εr) Width of the trace (W) Thickness of the RF trace (T) 1. Increasing W decreases Zo. 2. Increasing H increases Zo. 3. Increasing t decreases Zo, although it has small...
  2. K

    Raspberry Pi 3 and SPI interfacing issue

    here is the code snippet: #! /usr/bin/env python # -*- coding: utf-8 -*- import sys import time import serial import spidev from PyQt4 import QtGui, QtCore from PyQt4 import uic uifile_2 = 'sampi.ui' form_2, base_2 = uic.loadUiType(uifile_2) spi = spidev.SpiDev() spi.open(0,1) class...
  3. K

    Raspberry Pi 3 and SPI interfacing issue

    I am using Raspberry pi 3 and have done PyQt4 programming and created the GUI. I am trying to write data through SPI to the pic microcontroller and i was able to send it by defining the values in the code in a list format. But i am unable to send the data from the GUI. I have included all the...
  4. K

    Raspberry Pi communicate with a PIC microcontroller

    I am working on Raspberry Pi 3 board to communicate with a PIC microcontroller through UART pins but the RX is shorted to ground and TX is shorted to 3.3V supply. How to make the TX and RX pins to communicate with the micro controller through UART?
  5. K

    how to design a perfect pcb

    what are the things to be considered to design a good pcb.Thank you in advance
  6. K

    trace width and spacing

    Hi,currently iam trying Lpc2148 ARM board can any one suggest me minimum trace width and spacing should be used.
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