Inhaltsverzeichnis - Franzis Raspberry Pi Handbuch

INHALT
1 Vorbereitungen ...................................................................................................................... 10
1.1 Bauteile ..................................................................................................................... 10
1.2 Verbindungsleitungen ..............................................................................................16
1.3 Ausblick ......................................................................................................................19
1.4 LED an 3,3 V .............................................................................................................. 23
2 GPIO-Ausgänge ..................................................................................................................... 28
2.1 Python ....................................................................................................................... 28
2.2 Eine GPIO-Ausgabe ................................................................................................. 32
2.3 Blinkprogramme ...................................................................................................... 37
2.4 Grafi sche Programmierung mit Tkinter ...............................................................
2.5 Gegentaktblinker mit Tkinter .................................................................................
2.6 LED-Experimente .....................................................................................................43
2.7 Transistor-Schalter ..................................................................................................
2.8 Desktop-Start............................................................................................................
3 GPIO-Eingänge ......................................................................................................................54
3.1 Offene Eingänge ......................................................................................................54
3.2 Pullup und Pulldown................................................................................................ 57
3.3 Interner Pullup und Pulldown .................................................................................61
3.4 Input-Fenster mit Tkinter .......................................................................................
3.5 Experimente mit Pullup und Pulldown .................................................................64
3.6 Berührungstaster.....................................................................................................
4 PWM-Ausgänge ..................................................................................................................... 70
4.1 PWM-Steuerung ....................................................................................................... 70
4.2 PWM-Ausgabe im Fenster......................................................................................
4.3 Gefi lterte Gleichspannung ......................................................................................77
4.4 Die Spannung einer LED ......................................................................................... 79
4.5 Spannung am GPIO-Input .......................................................................................
4.6 Transistor-Aussteuerung ........................................................................................83
5 Zähler und Zeitmesser .........................................................................................................
5.1 Die interne Uhr .........................................................................................................
5.2 Geschwindigkeit von Portzugriffen ......................................................................88
5.3 Frequenzmessung ...................................................................................................89
5.4 Frequenz des PWM-Ausgangs ...............................................................................92
6 RC-Messungen ......................................................................................................................96
6.1 Widerstände messen ..............................................................................................96
6.2 Messung am GPIO Pulldown ..................................................................................99
6.3 Pullup-Messung .....................................................................................................100
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