Download 104 EASY Projects for the Electronics Gadgeteer by Robert Michael, Brown PDF

By Robert Michael, Brown

ISBN-10: 0630695245

ISBN-13: 9780630695241

This would rather well be a publishing first—a e-book dedicated to the idea that the majority of the true enjoyable in digital tinkering is derived from scrounging and swiping, trial and mistake, and sturdy, outdated - formed affordable - skating. Youll be stunned on the worthwhile and enjoyable stuff you can prepare with a bit mind's eye and to be had components.
Youll be much more shocked if you discover what might be refrained from tubes or transistors! the aim of this publication is to provide you a few nutrients for proposal alongside those traces and to clue you in on a few methods of the exchange in getting the main for the least.
Contents
Introduction 9
Homebrew mild Meter 13
Tubeless/Transistorless Code perform visual display unit 14
Electric mix Lock 15
Super Crystal Radio 16
Surplus Relay Lamp Flasher 17
Signal Generator 19
Electronic Thermometer 20
Audio Frequency Meter 21
Dry- mobile Rejuvenator 23
Flashgun Tester 24
Ultra-Cheap sign Generator 25
TV Set Radio Receiver 27
Hi-Fi Tuner 28
Inexpensive Early Morning Alarm 30
Double Battery provide For the auto 31
Sonalert Intrusion Alarm 32
Hi-Fi within the motor vehicle 33
A «Whistler» Listening machine 34
TV Ghost Eliminator 36
Adjustable Noise Generator 37
Professional Hygrometer 38
Perpetual Flasher 40
Tone Compensator For Tape Recorders 41
Electronic Tone Generator 42
9-Volt Battery Charger 43
Super box power Meter 44
Telephone Intercom Adapter 46
Neon Bulb Oscillator 47
Add-On Noise Limiter 48
Full-Wave Noise Limiter 50
CB- To-Auto Antenna Adapter 51
Audio Wattmeter 52
Inexpensive automobile Battery Charger 54
Simple Crystal Detector 56
Super Band Spreader 57
Tunnel Diode Oscillator 58
Signal Blinker 59
Loudspeaker-To-Mike Converter 60
Electronic «Coin Toss» 61
Inexpensive Voltage Tri pi er 63
Line Voltage keep watch over Unit 64
1000-Volt Buzzer strength provide 65
Blow-Out Protector For Loudspeakers 67
Inexpensive Transistor Checker 69
Free-Power Batteryless energy offer 71
Electrostatic Speaker Converter 72
Two television units With One Antenna 74
Tube Rejuvenator 75
Oscilloscope Calibrator 77
Sequential Neon Flasher 79
Electrifying trojan horse Turner 80
Power provide From Filament Transformers 82
Color television photograph Roll Stopper 83
Electronic Anemometer 84
Bubble Lamp evening Lite 86
Scratch clear out For forty five RPM Discs 88
Subminiature energy offer 89
The secret Alarm 90
Junkbox Modulation Indicator 91
Darkroom Timer regulate 93
Effective 6-Meter Antenna Coupler 95
Tubeless Audio Squelch 96
AI I-Purpose Battery Charger 97
«Beeper» Transistor Tester 99
Simplest box power Meter 100
Electronic Reflex-Action video game 101
Kilowatt RF Voltmeter 103
FM Tuner To Hi-Fi Adapter Unit 104
Light Dimmer 105
SCR Diode Checker 106
Mechanized Polarity Reverser 108
«Instant-On» equipment Adapter 109
Cheater wire Cure-Ail 110
Automatic Frequency Finder 111
Worlds most cost-effective Intercom 113
150-Volt common energy offer 114
An digital Shaver Converter 115
Shave-In-Your-Car Adapter 116
Romantic gentle Dimmer 117
Taped CQER machine 119
«The tourist» automated condo change 121
9-Volt TR Battery Eliminator 122
Simplest Noise Limiter 123
Slide-Switch Loudness keep an eye on 124
99tf Stroboscope 126
12? Lightning Detector 127
Neon Bulb AC/DC Voltmeter 128
Simple RC Tester 129
Hi-Fi Notch clear out 131
Tubeless/Transistorless AM Modulator 132
Automatic picture Slide Projector 133
Handy Tube Tester 135
AC Line Alarm 136
Super-Regen S Meter 138
Tubeless Loudspeaker CPO 139
Light Bulb strength Measurer 140
RF «Sniffer» Probe 141
Cheap Push-To-Talk Relay 142
Direct-Reading CB energy Wattmeter 143
Voltage Regulator Hash seize 145
Universal AC Relay Silencer 146
Bike Generator AC-To-DC Converter 147
Foolproof Sequential Switching Adapter 148 Shortwave Trimmer-Booster For classic Receivers 149

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Extra resources for 104 EASY Projects for the Electronics Gadgeteer

Sample text

7 and audio alarm unit of Fig. 8. ❏ March 2001 Circuit Ideas 2001 CIRCUIT IDEAS AUTOMATIC HEAT DETECTOR SUKANT KUMAR BEHARA T his circuit uses a complementary pair comprising npn metallic transistor T1 (BC109) and pnp germanium transistor T2 (AC188) to detect heat (due to outbreak of fire, etc) in the vicinity and energise a siren. The collector of transistor T1 is connected to the base of transistor T2, while the collector of transistor T2 is connected to relay RL1. The second part of the circuit comprises popular IC UM3561 (a siren and machine-gun sound generator IC), which can produce the sound of a fire-brigade siren.

When switch S2 is on position ‘b’, switch S1 is disconnected, while pin 6 is connected to pin 2. When capacitor C is charged, it is discharged through pin 2 until it reaches 1/3Vcc potential, at which it is retriggered since trigger pin 6 is also connected here. 2Hz frequency). The second timer is triggered as before to produce a 1-second pulse in synchronism with the trailing edge of 5-second pulse. This circuit is important wherever a pulse is needed at regular intervals; for instance, in ‘Versatile Digital Frequency Counter Cum Clock’ construction project published in EFY Oct.

This permits the user to operate the lamp and fan during cleaning of the toilet or for bypassing the circuit, when bathroom or toilet undergo repair work. ELECTRONICS FOR YOU ❚  MARCH 2001 Construction 2001 CONSTRUCTION INTERFACE YOUR PRINTER WITH 8085 MICROPROCESSOR NA ANJA RUP SHAILA GHANTI I t is very convenient to interface a printer to print 8085 programs. Here a simple hardware interface circuit with its driver software is described that would enable students to take printout of the 8085 programs in hexadecimal codes along with their memory locations in the format: XXXX DD, where XXXX is the 4-bit hexadecimal address and DD is 2-bit hexadecimal data.

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