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Diodes II Figure 7.19 The same circuit with a smoothing capacitor added Figure 7.20 The breadboard layout for the circuit in Figure 7.19 That’s all for this chapter. Next chapter we’ll move onto another semiconductor — possibly the most important semiconductor ever — the transistor. Try the quiz over the page to see what you’ve learned here. 165
Starting electronics Quiz Answers at end of book 1 Resistor characteristic curves are: a nearly always linear b always exponential c nearly always exponential d rarely drawn e b and d f all of these 2 Diodes are: a ohmic b non-ohmic c linear d non-linear e a and c f b and d g none of these 3 The voltage across the diode whose characteristic curve is shown in Figure 7.1 is 0V7. What is the current through it? a 60 mA b about 700 mV c about 6 mA d it is impossible to say, because diodes are non-ohmic e none of these 4 Mains voltages are dangerous because: a they are a.c. b they are d.c. c they are high d they are not stabilised e none of these 5 A single diode cannot be used to full-wave rectify an a.c. voltage: True or false? 6 For full-wave rectification of an a.c. voltage: a a bridge rectifier is always needed b as few as two diodes can be used c an IC voltage regulator is essential d a and c e all of these f none of these 166
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Starting Electronics i
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Starting Electronics Keith Brindley
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Contents Contents Preface vi 1. The
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The very first steps 1 The very fir
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The very first steps potential rewa
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The very first steps Photo 1.2 tool
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The very first steps that electrici
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The very first steps Going back to
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The very first steps tially exist.
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The very first steps by a scientist
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The very first steps Hint: Ohm’s
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The very first steps Electronic com
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The very first steps Larger values
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The very first steps Time out That
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On the boards 2 On the boards In th
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On the boards If you are following
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On the boards Hint: The theoretical
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On the boards Photo 2.2 Inside brea
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On the boards Down the edges of the
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On the boards Hint: The multi-meter
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On the boards of leads should be su
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On the boards it gets older and sta
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On the boards Hint: The bands group
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On the boards In practice, you migh
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On the boards called just ohmmeter)
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On the boards ends. We say resistor
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On the boards we would get: and thi
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On the boards Figure 2.9 A comparat
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Measuring current and voltage 3 Mea
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Measuring current and voltage forme
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Measuring current and voltage Netwo
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Measuring current and voltage Netwo
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Measuring current and voltage Did y
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Measuring current and voltage Figur
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Practically there Measuring current
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Measuring current and voltage Take
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Measuring current and voltage Take
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Measuring current and voltage Hint:
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Capacitors 4 Capacitors You need a
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Capacitors Capacitors We’re going
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Capacitors In our experiments in th
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Capacitors Figure 4.4 A simple resi
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Capacitors Time (seconds) 5 10 15 2
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Capacitors Time (seconds) 5 10 15 2
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Capacitors In a capacitor circuit l
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Capacitors Figure 4.11 An experimen
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Capacitors Time (seconds) Voltage (
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Capacitors plates of the capacitor
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Capacitors where ε is the permitti
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ICs oscillators and filters 5 ICs,
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ICs oscillators and filters Photo 5
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ICs oscillators and filters We’ve
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ICs oscillators and filters an osci
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ICs oscillators and filters (a) (b)
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ICs oscillators and filters Ouch, t
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ICs oscillators and filters output
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ICs oscillators and filters Value o
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Page 126 and 127: ICs oscillators and filters Figure
Page 128 and 129: ICs oscillators and filters simple
Page 130 and 131: Diodes I 6 Diodes I We’re going t
Page 132 and 133: Diodes I Photo 6.1 A horizontal pre
Page 134 and 135: Diodes I Now, with a resistance of
Page 136 and 137: Diodes I here. We needn’t know an
Page 138 and 139: Diodes I Figure 6.9 The breadboard
Page 140 and 141: Diodes I but we never said it was a
Page 142 and 143: Diodes I Current (mA) Voltage (V) 0
Page 144 and 145: Diodes I voltages, reverse currents
Page 146 and 147: Diodes I battery voltage of 9 V sim
Page 148 and 149: Diodes I Figure 6.17 The circuit, w
Page 150 and 151: Diodes I Figure 6.19 My results fro
Page 152 and 153: Diodes II 7 Diodes II In the last c
Page 154 and 155: Diodes II the same experiment we di
Page 156 and 157: Diodes II We need to draw diode cha
Page 158 and 159: Diodes II Generally, diodes don’t
Page 160 and 161: Diodes II Diode voltage (VD) Resist
Page 162 and 163: Diodes II Diode circuits We’re no
Page 164 and 165: Diodes II Figure 7.9 Waveforms show
Page 166 and 167: Diodes II Filter tips Although we
Page 168 and 169: Diodes II We’ve already seen a de
Page 170 and 171: Diodes II as that from a 230 V a.c.
Page 174 and 175: Transistors 8 Transistors In previo
Page 176 and 177: Transistors Figure 8.1 How to recog
Page 178 and 179: Transistors Black meter lead Red me
Page 180 and 181: Transistors Well, as mentioned earl
Page 182 and 183: Transistors Figure 8.8 A breadboard
Page 184 and 185: Transistors In effect, the transist
Page 186 and 187: Transistors Figure 8.10 transistors
Page 188 and 189: Transistors Hint: Yes, that’s rig
Page 190 and 191: Transistors These two operational m
Page 192 and 193: Analogue integrated circuits 9 Anal
Page 194 and 195: Analogue integrated circuits circui
Page 196 and 197: Analogue integrated circuits Figure
Page 198 and 199: Building on blocs Analogue integrat
Page 202 and 203: Analogue integrated circuits As the
Page 206 and 207: Analogue integrated circuits circui
Page 212 and 213: Analogue integrated circuits an app
Page 214 and 215: Digital integrated circuits I 10 Di
Page 216 and 217: Digital integrated circuits I Logic
Page 218 and 219: Digital integrated circuits I If we
Page 220 and 221: Digital integrated circuits I Figur
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Digital integrated circuits I It’
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Digital integrated circuits I Figur
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Digital integrated circuits I The t
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Digital integrated circuits I Trans
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Digital integrated circuits I going
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Digital integrated circuits I OR an
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Digital integrated circuits I For t
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Digital integrated circuits II 11 D
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Digital integrated circuits II A se
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Shutting the ’stable gate Digital
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Digital integrated circuits II gate
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Digital integrated circuits II In o
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Digital integrated circuits II Figu
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Digital integrated circuits II Swit
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Digital integrated circuits II The
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Open the black box Digital integrat
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Digital integrated circuits II Ther
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Glossary Glossary 180 ° out-of-pha
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Glossary bode plots method of showi
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Glossary decibels logarithmic units
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Glossary integrated circuit a semic
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Glossary peak voltage the voltage m
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Glossary squarewave a signal which
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Glossary Components used Resistors
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Glossary Index A ampere, 9 AND gate
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