Scheda universale minishield 8 ingressi opto isolati

Identificazione progetto

progetto n.12

autore

email

note

Anteprima di alcune pagine del libro di Marco Gottardo, edito in Agosto 2012.

Il libro e' scritto in semplice lingua inglese, e contiene un grandissimo numero di schemi, progetti, programmi in Hitech-C, programmi in LAdderPIC, tre tesine scolastiche completamente svolte

Marco Gottardo

 

ad.noctis@gmail.com

Titolo del libro:

Let's GO PIC!!!  The book

Reperibilita'

Solo formato cartaceo

sul sito www.lulu.com

Numero pagine 450

Disponibile da fine Agosto 2012. Ordina online ti arriva per posta.
Anteprima copertina, forse cambiera'  prima della pubblicazione.

Premessa

Dopo due anni di pubblicazione del noto corso online "Let's GO PIC!!!" sono giunto alla conclusione che il materiale poteva essere una buona base su cui impostare un libro adattto sia per la didattica, che per l'hobbistica che per il professionista.  Il materiale gia' online e' solo il primo mattone di un testo che ho volutamente fermato a 450 pagine dato che e' gia' in cantiere il seguito, la cui uscita e' prevista per fine Dicembre 2012, che avra' titolo "Let's Make Robot's!!!" dai contenuti molto piu' impegnativi e che richiede come propedeuticita' tutte le nozioni contenuti in questa prima pubblicazione.

La filosofia con cui l'ho scritto e'  "Learning by doing", ovvero sarete guidati passo in ogniuna delle molteplici realizzazioni.  Le piattaforme sono ovviamente le Micro-GT sia mini che versatile IDE.

Riporto qui sotto l'indice degli argomenti, benche' in data odierna sia ancora incompleto lo troverete sicuramente molto ricco e suducente.  La publiccazione e' ottimale per le scuole di istruzione secondaria, per la formazione professionale e le universita'.  Ovviamente e' il testo di riferimento per tutti i miei corsi, sia professionali che hobbistici come quelli che tengo a Padova presso il centro culturale ZIP.

dedicated to all those who dream, invent and would create.

                                                                              Marco Gottardo

 

table of contents and index

  • ·        How to compile an empty program.

  • ·        First steps in the C programming.

  • ·        A little deeper into the C language.

  • ·        Apply C on Microcontroller programming.

  • ·        Reading a input.  

  • ·        Flashing a LED.  

  • ·        How to direct use PLC notion on PIC programming.     

  • ·        The Micro-GT versatile IDE.

  • ·        ICSP (in circuit serial programming).

  • ·        LVP (low voltage programming).

  • ·        How to interfacing Micro-GT IDE with PICKIT 2/3

  • ·        Configuration word “the fuses”.

  • ·        PIC architecture overview.

  • ·        Interrupt sources.

  • ·        An exercise with interrupts

  • ·        How to handle TMR0 overflow interrupt (exercise).

  • ·        Firmware simulation.

  • ·        Dual stage Power supply Module

  • ·        The digital I/O

  • ·        The MCLR button

  • ·        How to use Micro-GT digital input

  • ·        How to use Micro-GT digital output

  • ·        The BCD to 7segments integrated module.

  • ·        Mini shield universal display

  • ·        How to drive a DC motor

  • ·        Some simple test with PWM control.

  • ·        Mini shield Micro-GT PWM Power inverter.

  • ·        How to drive a stepper motor.

  • ·        proposed exercise: Multi speed CW/CCW program.

  • ·        Star-Delta starter.

  • ·        The Micro-GT mini.

  • ·        How to supply the micro- GT  mini  or IDE

  • ·        The Micro-GT mini I/O expansion.

  • ·        The LCD 2x16: How to.

  • ·        LCD Application  in an automatic coffee machine.

  • ·        PIC serial communication: How to

  • ·        A VB.net interface for direct digital output control.

  • ·        ADC's PIC: how to read analog signals.

  • ·        How to create a Bar graph for analogue level meter.

  • ·        Automatic gate:The complete thesis.

  • ·        Three floor lift: The complete thesis.

  • ·        proposed exercise: Micro-GT basic calculator.

 

 Appendix

  • ·        freewheeling diodes.

  • ·        How does a DC motor work?

  • ·        How to build a simple H-Bridge interface.

  • ·         How to use the G-Tronic H-Bridge to drive two external load.

  • ·         A miniaturized H-Bridge interface

  • ·         Simple overview in PWM topic.

  • ·         Micro-GT mini and PIC18F2550

  • ·         Solution exercise n ° 1:  Micro-GT basic calculator

  • ·         Solution exercise n ° 2: Multi speed CW/CCW, second example program

  • ·         How to implement a binary clock and a a 24houres clock (complete exercise).

  • ·         What is an inverter

  • ·         Let's project an inverter with adjusting the output frequency.

  • ·         A educational three-phase inverter.

  • ·         How to generate a sinusoidal output inverter.

  • ·         A funny Christmas gift.

  • ·         Buildi's stairs automatically lights off.

  • ·         Multi channel hardware PWM

  • ·         A look inside the delay functions

  • ·         Controlling a servo motor with Micro-GT mini

  • ·         Universal adjustable power supply  

  • ·    Adjustable Switching power supply. from 5.1 to 15 Volts with 4 Ampere.

  • Single secondary 4A power supply Wiring diagram

 

 Hardware and shematics

  • ·         Precision temperature acquire system.

  • ·         wide range minishield  temperature acquire.

  • ·         Micro-GT programmer compatible PICPROG2009.

  • ·         Mini demoboard for 16F628

  • ·         Mini Micro-GT PLC/demoboard for 16F873/16F876/18F2550

  • ·         Micro-GT P877-Z

  • ·         Variant and minishield for Micro-GT P877-z  PLC.

  • ·         Micro-GT minishiedl universal 8 channel optocoupler.

  • ·         Micro-GT minishield universal 8 relays output.

  • ·         Some frinds and collaborator.

 

 

 

Micro-GT minishield universal 8 channel optocoupler

This minishiel is for general use, can be paired with any microprocessor or microcontroller card. The construction is simple and will operate immediately. The used components is of wide distribution. The optical separation from the outside world provides high stable operation for the microcontroller. It is essential to keep the masses always separate GNDIO (external) from GND (internal). Connect together the two areas make useless the 4N26 and there isn't electrical isolation. The main purpose of the optical isolation is to stop any pulse of high voltage induced in the signal cables.

 

The integrated circuit that contains an optocoupler shows 6 pin of which some are not used. There are versions for multichannels, but we decided, on this book, to use the 4N26 because it's cheap, simply to use and widespread.

 

 

By routing with Eagle CAD we get PCBs surface of only 60mm to 80mm, very compact. The drawings, made by sch, brd, and gerber files are available free of charge from the author's website. If interested to a small series, for professional or didattic use, can be ordered by e-mail.

 

 

      

 

The card is designed to be mounted on normalized omega DIN  guide, using the specific plastic clips. But the two holes, drilled of 3mm diametre can be aid for mount inside a chassis with other electronic devices.

 

 

On the left side of the card there are the screw terminal blocks of the inputs coming from the outside. Each input is bipolar and related to its ground disconnected from the inside one. The right side we can see a single terminal, at the top, for power supply related to the microprocessor board. The internal ground is referred by it.

Minishiedl optocoupler top layer

Minishiedl optocoupler bottom layer

 

The remaining 8 screw terminals on the right are the outputs of the optocouplers and are already referenced to earth ground via terminal above. The applications is a lot, so you can modify some resistors values to obtain the right saturation of the internal transistor without burning the inner LED.

In some cases you can use the card to optisolare the outputs of the microcontroller to drive the Triac for circuits at 240V AC. In thease case be carefull in handly the board. For output isolation is better use a relay board.

 

I circuiti stampati possono essere richiesti all'autore via mail  ad.noctis@gmail.com

Questo progetto è ridistribuibile secondo i termini di licenzaCreative Commons Attribuzione-Condividi allo stesso modo 3.0 Italia

 

Note aggiuntive

Visita i siti web che ho sviluppato io, e dammi un tuo giudizio, agli indirizzi:

http://www.bb-yewilliam.it/    (il bed end brekfast di Jenny per chi fosse di passaggio a Padova)

http://www.amministrazionibugno.it/   (l'agenzia di amministrazione condominiale dell'amico Massimiliano)

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