Showing posts with label Circuit-Design. Show all posts
Showing posts with label Circuit-Design. Show all posts

Saturday, August 23, 2014

Microcontroller and SBC in Real World

details required for... Atmels 89C52 Microcontroller A/D D/A converter Keypad LCD display(Or LED Display) 5V Regulated power supply. Temperature & Humidity controller using PID control algorithm implemented using Atmel's 89C52 microcontroller for a AHU unit ( Analog Input from the sensor(4 wire) 0-10v dc & Output from Microcontroller is 4-20mA to the Actuator through a DAC converter).

The Temperature & Humidity to be controlled are 24±1 degree Celsius and 55%±2% Rh respectively. provide me with good LINKS.

mail from SA

Get a sensor that gives a 0-10V or 4-20mA proportional to RH% and Temp deg C. what you need to do now is to select a A/D and a D/A for a real world interface

you can visit these links.......

DigiThermo Wichit Sirichote

DigiThermo 0-100.0 °C Wichit Sirichote

Build your own a laboratory instrument for measuring time and temperature. The DigiThermo demonstrates the use of 'C' language, a dual-slope converter, LCD interfacing, and digital filtering as well..

The Assembly language program for this may be the complex, due to PID. and my uC pages micro-delabs also in my other pages you can find theory on PID etc, in them i have MCS51 code for 2 setpoint process controller.

delabs

Other uC projects sites links

Temperature and Humidity Meter -  This project is a combined temperature and humidity meter. It is an improvement on my PIC-based humidity meter and my PIC and AVR thermometers. I use an ATmega164, which as lots of I/O and memory.
    Temperature and humidity measurements with the AVR web-server- The tuxgraphics Ethernet board has a lot of general purpose IO pins where external hardware such as sensors can easily be attached. In this example we use the sensirion sht11 sensor to measure temperature, humidity and calculate the dew point.

    Tuesday, August 19, 2014

    Datasheets and IC Application Notes

    where can I find on IC data and their application?  mail from EA

    Answer by delabs

    Vintage DataBooks are a valuable source of Electronic Product Design Ideas. Study the Applications.

    Folkscanomy Electronics: Books on Electronics, Circuits and Processors 

    You will also find Radio Electronics and many other Datasheets. Even of firms that do not exist now.
    Datasheets and IC Application Notes

    One of the books here is The " Intersil Hot Ideas" - This was my Mentor Book These helped me build Intelligent Instruments in the 80s. Intersil( GE) was in advanced CMOS before anybody else. They made the smartest chips when the Microprocessors were being examined Skeptically by engineers. (At that time Microprocessors needed many support chips and consumed huge power only later CMOS uC came)

    See also delabs Resources i have created as a reference for such doubts (2007)

    Sunday, March 16, 2008

    Orcad Spice Simulation CD4060

    I found your web site today. I am looking for the CD4060 spice model for Orcad Capture. My Orcad version is the 9.2 (complete but without CD4060 !!)

    I saw on your web pages a design using this component. How can I have the CD4060 model (to use it in simulation) ?

    Mail from EG France


    Have a look at these links.

    PSPICE 9.1 student version - electronics-lab.com-downloads-013
    see the database library files.

    "The Orcad demonstration package includes several libraries for circuit layout, but only the EVAL.LIB has SPICE models as well. This library includes a range ...."

    Please study all links above and tell me if it solves your problem, Look and study each link above. If you have a problem still, then i will search again or find a solution

    Also try out and use Cadsoft Eagle.

    delabs