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SPECIALE PARALLAX SX Microcontrollori 8 bit ad alta velocità DISPOSITIVO MULTIFUNZIONE CON SMART CARD • Chiave Elettronica • Credito a scalare FEBBRAIO n° 260 • Anno 23 • Attivazione utenza www.farelettronica.com PLC PER TUTTI Al via il nuovo corso che vi guiderà passo-passo alla programmazione dei PLC utilizzando LADDER e BASIC RUBRICA MHZ L’adattamento d’impedenza in radiofrequenza PIC-SUDOKU - Milano il CPM di Roserio tassa presso la relativa che si impegna a pagare all'editore restituire recapito, mancato Il sorgente in MikroBasic per risolvere La divisione di codice nelle trasmissioni digitali una qualsiasi griglia Sudoku IDEE DI PROGETTO , DCB Milano. In caso di PIC & MikroC RS232 Quadruplicatore di tensione con TD310 Come leggere valori analogici Tutto quello Beep Beep digitale utilizzando che c’è da sapere sull’interfaccia DS8669 2-digit bcd to 7-segment decoder/driver il convertitore seriale per eccellenza Sensore di precisione di temperatura fahrenheit AD del PIC con LM34 Alimentatore phantom Convertitore frequenza/tensione con LM2907 per microfoni Barra diodi led con LM3916 Collegare microfoni www.farelettronica.com Duplicatore di tensione professionali ad un mixer tradizionale? € 5,50 Con questo alimentatore si può! Onda quadra e triangolare con LM566C MENSILE Poste Italiane Spa - Spedizione in abbonamento Postale - D.L. 353/2003 (conv. In L. 27/02/2004 n. 46) art. 1, comma1 In L. 27/02/2004 (conv. 353/2003 - D.L. Postale Italiane Spa - Spedizione in abbonamento MENSILE Poste ININ EDICOLA EDICOLA NonNon perdereperdere ilil numeronumero didi questoquesto mesemese servizioservizio MIPMIP M ore I nfo P lease! www.farelettronica.com Richiedi maggiori informazioni sui contenuti di Fare Elettronica, visita il sito: www.farelettronica.com/mip Oppure compila questo modulo ed invialo via fax al numero 02 66508225 Numero della rivista 260 Codici MIP* (da compilare) DATI DEL LETTORE Nome Cognome Azienda Indirizzo Azienda Cap Città Prov. Nazione Tel. Fax e-mail Privacy. Ai sensi del Decr. Lgs. 196/2003 la informiamo che i dati trasmessi verranno impiegati coi principali scopi di indagini di mercato e nelle modalità previste dallo stesso, pre- valentemente con mezzi informatici. Il conferimento, di norma facoltativo, è obbligatorio per permettere il rapporto commerciale. È in ogni caso fatto diritto dell’interessato eserci- tare i propri diritti, nei modi previsti dal “Titolo II art. 7” della legge sopra citata, scrivendo a Inware Edizioni Via Cadorna 27 – 20032 Cormano o trmite email a [email protected] * Utilizza il numero MIP che compare alla fine di ogni articolo o all’interno delle pagine di tuo interesse Guida al numero 260 Informati! Pratica Richiedi maggiori informazioni 22 PLC per tutti: introduzione al Cubloc Viste le molteplici richieste pervenute in sui contenuti di Fare Elettronica, Redazione a proposito della realizzazione e visita il sito: programmazione di PLC, abbiamo deciso di proporvi questa serie di articoli dedicati a www.farelettronica.com/mip CUBLOC, un PLC in miniatura, program- mabile in Basic come un microcontrollore e pag. 3 in Ladder come un PLC. Ecco le principali caratteristiche e come utilizzarlo. Vinci! 34 Dispositivo Multifunzione con Smart Card Il dispositivo di attivazione con Card che vi presentiamo, nasce per essere utilizza- Con il quiz Le So Tutte!!! to anche da chi gestisce singole utenze elettriche o pochi utenti. Le sue caratteri- puoi vincere stiche principali sono la semplicità, in ogni mese uno quanto non utilizza il PC; la multifunziona- lità, perché ricarica le card e seleziona di questi fino a 5 programmi; la facilità di utilizzo, fantastici perché impiega un display LCD, due tasti ed un menù di gestione e per ultimo, ma non da meno, la sua economicità. premi! 50 PIC- SUDOKU: Il software e l’algoritmo di risoluzione In questa seconda ed ultima puntata ana- lizziamo il software che consente al PIC di risolvere una griglia del Sudoku. Matematica e logica si intrecciano dando vita ad un algoritmo complesso ma ricco di elementi didattici e tecnici. 62 Alimentatore phantom per microfoni pag. 48 I moderni sistemi di amplificazione P.A. si servono di microfoni con preamplificatore interno ed alimentati tramite il mixer o l’apparecchio cui sono connessi, di segnale audio bilanciato per annullare rumori e limita- re le interferenze determinate dalla lunghezza del cavo. In queste pagine Risparmia! proponiamo un efficiente alimentatore da rete per poter utilizzare micro- foni professionali con mixer non dotati di alimentazione 9-48V coassiale. ABBONATI O RINNOVA OGGI IL TUO ABBONAMENTO A FARE ELETTRONICA 1 ANNO MHz 11 100 L’adattamento d’impedenza RIVISTE Un nodo fondamentale in radio frequenza e rappresentato dagli adat- tamenti d’impedenza. In quest’articolo affronteremo delle tecniche d’a- dattamento spiegando pregi e difetti d’alcune configurazioni circuitali. Una raccolta di formule sarà poi presentata come prontuario al calcolo. L’abbonamento a soli €45,00 invece di €60,50 106 Tecniche di trasmissione digitale: CON UN RISPARMIO DEL La divisione del codice Continuiamo la trattazione sulle tecniche di trasmissione digitale, ini- 25% ziando con la parte più esoterica, introdurremo infatti l’innovativo con- pag. 112 cetto di divisione di codice. FEBBRAIO 2007 Teoria Risorse 80 MikroC By Example: Uso del Convertitore A/D 8 Prima pagina In questa puntata scopriremo come gestire il convertitore • Antenne polimeriche UWB per applicazioni analogico/digitale dei PIC con il MikroC e come utilizzarlo per realizza- consumer re delle interessanti applicazioni. • Radio PRoC™ programmabile a bassa 88 Interfaccia standard EIA RS232 dissipazione con tranceiver a 2,4GHz e L’interfaccia standard seriale RS232, microcontrollore integrati disponibile su tutti i PC, è stata svilup- • LEM: nuova famiglia di sensori di corrente in pata per i collegamenti su lunghe applicazioni automotive per il controllo-batteria distanze ed ha ottenuto una ampia dif- fusione con lo sviluppo di Internet. Il • Prima mondiale per i nuovi moduli Telit UMTS/HSDPA e per i moduli CDMA suo utilizzo, insieme ad un modem, ha dual-band consentito a moltissimi utenti di potersi immettere nelle linee telefoniche pubbli- • Microchip annuncia il sistema di emulazione che per poter navigare nelle rete globa- MPLAB® REAL ICE™ le. Negli ultimi anni, le sue applicazioni • IntelligenceFocus presenta DIMS, la nuova hanno avuto un rilevante sviluppo per il collegamento tra PC e piccoli tecnologia non convenzionale nata in Italia e apparati programmabili come microcontrollori, PLC, schede di valuta- scelta dall’America zione per applicazioni DSP, controllo motori ed agende elettroniche. Il • Da Linear buffer a bassa tensione di offset tutto grazie alla notevole semplicità di gestione ed implementazione. che permettono il cascading e una maggiore affidabilità dei bus I2C • Il Nomadik™ della STMicroelectronics nei telefoni cellulari Samsung con TV digitale Speciale mobile per il mercato coreano 68 Velocità, flessibilità e basso costo: i microcontrollori Parallax SX 14 Gli eventi di La Parallax offre un’ampia gamma di Febbraio 2007 microcontrollori per tutti i livelli di • Expo Elettronica - Rimini esperienza di programmazione. Si parte dai moduli BASIC Stamp fino a • Enermotive 2007 arrivare ai Propeller a 32 bit. Tra i due • Expo Elettronica - Marina di Carrara estremi si trovano i microcontrollori • Embedded world 2007 SX: sono proprio loro l’oggetto di que- sto articolo. Si cercherà di comprende- • 28ª Mostra Regionale dell’Elettronica re la loro architettura, l’ambiente di • F.I.E.RA sviluppo utilizzato, i compilatori e si vedranno alcune applicazioni pratiche. • Expo Elettronica - Faenza • 28ª Mostra Nazionale Mercato Radiantistico Aziende citate in questo numero • Microelettronica Abacom 99 Inware 41, 47 Area Rebus 43 IntelligenceFocus 10 16 Idee di Progetto Artek Electronic Solutions 33 I.I.R. 105 • 47 Quadruplicatore di tensione con TD310 Atmel 34 LEM 9 • 48 Beep Beep digitale Blu Nautilus 71 Linear Technology 12 • 49 DS8669 2-digit bcd to 7-segment Blu Press 57 Microchip 10, 22, 50, 80 decoder/driver Centro Fiera del Garda 79 Mikroelektronika 50, 80 Comfile 22 Millennium Dataware 61 • 50 Sensore di precisione di temperatura Consorzio Elettrimpex 25 Omron 8 fahrenheit con LM34 Cypress Semiconductor 8 Parallax 68 • 51 Convertitore frequenza/tensione ERF 87 Pordenone Fiere 95 con LM2907 Fiera di Vicenza 53 RS Components 11 • 52 Barra diodi led con LM3916 Framos 19 Scuola Radio Elettra 115 Futura Elettronica 37, 75 STMicroelectronics 13 • 53 Duplicatore di tensione Hi-Tech Software 47 Telit 9 • 54 Onda quadra e triangolare con LM566c ELENCO INSERZIONISTI www.farelettronica.com Area Rebus . pag. 43 Via N. Sauro, 32 - 45100 Rovigo (RO) Tel. 042527401 - www.arearebus.com DIRETTORE RESPONSABILE Antonio Cirella Artek Electronic Solutions . pag. 33 DIRETTORE ESECUTIVO P.zza Pirazzoli, 2 - 40020 Sasso Morelli (BO) Tiziano Galizia Tel. 0542.643192 - www.artek.it COORDINAMENTO TECNICO Maurizio Del Corso Blu Nautilus srl . pag. 71 Piazza Tre Martiri, 24 - 47900 Rimini HANNO COLLABORATO IN QUESTO NUMERO Tel 0541.53294 - www.blunautilus.it Giovanni Di Maria, Savino Giusto, Antonio Di Stefano, Amedeo Grossi, Luciano Ruocco, Andrea Marani, Blu Press . pag. 57 Angelo Cosimo Neve, Massimiliano Premoli. Via Cavour 65/67 - 05100 Terni (TR) Tel. 0744.433606 - www.blupress.it DIREZIONE • REDAZIONE • PUBBLICITÁ INWARE Edizioni srl - Via Cadorna, 27/31 - 20032 Cormano (MI) Tel. 02.66504755 - Fax 02.66508225 Centro Fiera. pag. 79 [email protected] -
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