Download 99 Practical Electronic Projects PDF
99 Practical Electronic Projects PDF
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99 Practical Electronic Projects PDF
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"99 Practical Electronic Projects" is a book that presents a collection of electronic circuits that can be used for a variety of practical applications. The circuits were selected because the components used in them are readily available and affordable, making them suitable for hobbyists and DIY enthusiasts. The book provides construction details where necessary but also allows for flexibility in how the circuits are built and the materials used. The book also offers guidance on how to modify the circuits for optimal performance, as well as advice on selecting and using electronic components. Overall, the book is aimed at helping hobbyists and electronics enthusiasts build and experiment with a variety of electronic projects.
This book is the availability of the circuit components. Admittedly, resistors and capacitors are easily obtained, or substitutions can be made within limited ranges. However, far too
often, semiconductor types are expensive and difficult to obtain. In fact, many industrial types can be obtained only on
quantity orders of 25 or more from specialized parts houses.
Therefore, the circuits shown in this book were selected because the solid-state components are of the hobby type. These
components are readily available over the counter at most electronic parts stores, or they can be ordered from mail-order
houses at reasonable prices.
Construction details are provided where necessary. If there
are no specific instructions, the circuit can be built in any manner and in any cabinet, provided reasonable care is taken. When
metal cabinets must be used, we teil you so. Otherwise, you
can use the conventional black plastic case sold by most parts
houses, or even pill bottles and plastic butter dishes. Do not
worry at all about the heat sinks. When heat sinks are required, we teil you about it; otherwise, simply ignore them.
To make things as easy as possible, capacitor symbols in
the schematics have either a straight line and a curved line,
or a straight line set in a bracket. The first Symbol indicates a
nonpolarized capacitor and you can install it without regard
to any markings because there is no polarity to be observed.
The capacitors indicated by the line and bracket are polarized
electrolytic capacitors and must be wired for the polarity
shown. The line in the bracket is marked with a plus sign, and
the polarity must be double-checked, because the project probably will not work if the capacitor connections are reversed. In
fact, serious damage to the capacitor and other circuit components may occur when the polarity is incorrect and power
is applied.
Some capacitor voltage ratings might seem excessive, such
as a 500-volt disc specified for a 9-volt circuit. In all instances,
we have specified the lowest cost capacitor. A 500-volt disc
would cost less than, say, a 10-volt miniature capacitor. Since
electrolytic capacitors often represent the biggest expenditure
for a project, we suggest you use the lowest cost units you can
get whenever possible. When a capacitor value is critical, we
specify a silver mica type. The minimum silver mica voltage
rating you can easily obtain is 100 volts—use this rating to
obtain the lowest cost. To be on the safe side, never use a capacitor with a voltage rating lower than that specified.
Potentiometers can be any taper unless a particular taper
is specified. When batteries are specified, do not use a smaller
size than recommended. It is much wiser to stick to the original
recommendation. Current requirements for a project are taken
into account for the battery type suggested in the parts list.
Every circuit will work with the specified transistors, but
there is a normal variation in transistor characteristics that
can affect performance. For example, a 2N3391 transistor has
a possible gain range of 250 to 500, a 2-to-l difference. If the
unit you use has a gain of 500, the base bias becomes critical,
and the specified bias resistor might not work in your project.
If you have an amplifier that distorts at high levels or an oscillator that will not start, try changing the value of the base bias
resistor.
Contents Of the Book:
AUDIO PROJECTS
1. Speaker Microphone Preamplifier
2. Carbon Microphone Converter
3. Ceramic Pickup Preamplifier
4. Crystal Radio Amplifier
5. Hi-Z Microphone Preamplifier
6. Budget Microphone Mixer
7. Hi-Z Amplifier Microphone Mixer
8. Line-Powered Phonograph Amplifier
9. Lo-Z Microphone Preamplifier
10. Power Megaphone
11. Loudhailer
AUTOMOTIVE PROJECTS
12. Auto Tachometer
13. Tenna-Blitz
14. Auto Adapter for Transistor Radios
15. Headlight Minder
BURGLAR-INTRUDER ALARMS
16. Electronic Siren
17. Flood Alarm
18. Latching Burglar Alarm
19. Power Failure Alarm
20. Electronic Combination Lock
HAM, and SWL PROJECTS
21. Broadcast Band Booster
22. CB Transmission Line Monitor
23. CB Modulation Meter
24. A-M Modulation Monitor
25. Portable CB Antenna
26. Extended CB Mobile Whip
27. Supersensitive Field-Strength Meter
28. Tunable FSM
29. Headphone Noise and Volume Limiter
30. Headphone Q-Peaker
31. S-9er for SWLs
32. 100-kHz Frequency Standard
33. Frequency Spotter
34. Budget CPO
35. CB Tuning Adapter
36. Electronic Keyer
EXPERIMENTAL CIRCUITS
54 V 37. Light Flasher
38. Light Comparator
39. Three-Way Tone Generator
40. Electronic Tuning
41. Nixie Numbers
42. Sideband Scrambler
LAMP and MOTOR CONTROL CIRCUITS
43. 400-Watt Lamp Dimmer
44. Minidrain Pilot Lamp
45. Light-Sensitive Relay
46. Induction Motor Speed Control
47. High Torque Motor Speed Control
48. Triac and SCR Hash Filter
MUSICAL INSTRUMENTATION
49. 98^ Fuzzbox
50. Amplified Superfuzz
51. Metronome-Timer
PHOTOGRAPHY PROJECTS
52. Slave Flash Tripper
53. Slide Projector Programmer
54. 500-Watt Photoflood Dimmer
55. Enlarging Meter
56. Stop-Motion Flash-Tripper
POWER SUPPLIES
57. Zener Regulator
58. Regulated 9-Volt Power Supply
59. Budget Power Supply for Solid-State Projects
60. Voltage Doubler
61. Voltage Tripler
62. Low-Ripple Preamplifier Power Supply
RADIO RECEIVERS
63. Direct-Coupled Radio
64. Amplified Crystal Radio
65. BFO for Transistor Radios
REMOTE CONTROLS
66. Light to Current Control
67. Low Voltage Relay Control
68. Light-Controlled Latching Switch
TEST EQUIPMENT (GENERAL)
69. Appliance Tester
70. RF Probe for VOMs
71. RF Probe for VTVMs
72. Oscilloscope Time-Base Calibrator
73. Vertical-Input Calibrator
74. Low-Voltage Diode Tester
75. Silicon-Rectifier Checker
76. Nickel-Cadmium Battery Charger
77. Light-Bulb Charger for Flashlight Batteries
TEST EQUIPMENT (AUDIO)
78. Microphone Beeper
79. Amplified VU Meter
80. Stereo Balancer
81. Distortion Meter
82. Sine-Wave Squarer
83. Audio Sniffer
TEST EQUIPMENT (RF)
84. CB Scope Booster
85. I-F Signal Generator
86. FM Alignment Oscillator
87. Signal Injector
88. Modulator for Signal Generators
TRANSMITTER PROJECTS
89. FM Wireless Microphone
90. Radio Pager
91. Multipurpose Transmitter
92. 15-Meter Flea-Power Transmitter
MISCELLANEOUS PROJECTS
93. Treasure Finder
94. Electronic Fish Lure
95. OTL Amplifier
96. Budget Scope Calibrator
97. Two-Set Antenna Coupler
98. Two-Way Signaler
99. Polarity Detector
Schematic Symbols
Information Of the Book:
Title: 99 Practical Electronic Projects Download PDF
Language: English.
Size: 14 Mb
Pages: 131
Format: PDF
Year:
Edition:
Author: by Herbert Friedman
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