56 Circuits for the Hobbyist.pdf
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Circuits for the Hobbyist
For your electronics hobby entertainment; ENJOY!
It is assumed that you have
AT LEAST
the equivalent of a Basic Electronics certificate for the
electronics projects listed on this page. Other projects require more advanced electronics. A lot of
these circuits assume the latter so
I will no longer
answer the tons of emails in regards to that. If you
wish to learn more about electronics there is enough of that available on the internet.
Circuits' Message Board
Ask your questions here. Someone may answer them.
ScanMate
Your (Radio) scanner
buddy! 6-20-2002
Simplest R/C Circuit
Simplest RF Transmitter
Simple Transistor Audio PreAmplifier
Single IC Audio Preamplifier
Solar Cell NiCad Charger
Alternating On-Off Control
Audio Pre-Amplifier #1
Automatic 9-Volt Nicad Battery Charger
Basic IC MonoStable Multivibrator
Basic RF Oscillator #1
Basic LM3909 Led Flasher
Battery Monitor for 12V Lead-Acid
Battery Tester for 1.5 & 9V
Bench Top Powersupply, 0-30V/0-10A, Part 1
Bench Top Powersupply, 0-30V/0-10A, Part 2
Bench Top Powersupply, 0-30V/0-10A, Part 3
Birdie Doorbell Ringer
'Bug' Detector with Beep
Car Converter for 12V to 9V
Car NiCad Charger
DC Motor Reversing Circuit
DC Motor Control Circuit
Gel Cell Charger, I - Off-line
Gel Cell Charger, II
Clock Generator
Christmas Lights Tester
Continuity Tester, Low-Voltage
Continuity Tester, Smart
7-24-
2002
Solid State Relay
Third Brake Light Pulser
Toroids, RF/EMI Cores
Touch Activated Alarm System
Two-Tone Trainhorn
Universal Flasher Circuit
Variable Power Supply, 1 - 30V @ 1.5A
Wailing Alarm
Water-level Sensing and Control
Waterpump Safety Guard for Fish-pond
Weller WLC100 Electronic Soldering
Station
Xmas Lights Tester
Zap Adapter
1.5V Tracking Transmitter
4-Transistor Tracking Transmitter
Continuity Tester, Latching
Cut Phone Line Detector
Dark/Light Activated Relay
Electronic Dazer
9-V Stabilized Powersupply
30-Meter QRP Transmitter for Morse Code
555 Timer IC Tester
5-30-2002
555 Go No/Go Tester
More advanced
741-Light Sensor
6-13-2002
Fluid-Level Detector
High Voltage circuits
Interesting HV devices
Lantern Flasher/Dimmer
Led Flasher, 2 transistor
Leds Flasher, alternately
LED Pilot Light (AC or DC)
Light Sensor With Hysteresis
Logic Probe with pulse
Logic Probe with pulse, CMOS
Micro-Spy with FETs
Micro-Spy with USW
Micro-Spy with TTL
Miniature FM Transmitter #1
Miniature FM Transmitter #2
Miniature FM Transmitter #3
Mini-Drill variable Powersupply
Missing Pulse Detector (Basic)
Morse Code Practice Keyer, I
Morse Code Practice Keyer, II
Motor Accu Lader
(Dutch)
Motorcycle Battery Charger
No-Hassle Third Brake Light
9 to 9 pin (Female) Nullmodem Cable
555 Timer/Oscillator
741 Op-Amp
Capacitors
6-28-2002
Electronic Template
MosFet Test
Piezo Education/Tutorial
PLL - Almost done!
Resistor Color Code Tutorial
SCR Tester
Triac Test
UJT Test
Coils
Integrated Circuits
Make Your Own Shunts
Relays, Relay Drivers, Solid-State
"Green" means on-line, "Red" means off-
line
Practical Intercom
Pulse Width modulator
8-
Bookmark this valuable page with
'Ctrl-D'
.
07-2002
RF Transmitter, light sensing
RJ45 Cable Tester
Radio Shack Special
Circuits Archive
- Older circuits. Most are working, some are not. Could be still useful.
Radio Shack Partnumbers
- Most common order numbers for my circuits
Tandy Corporation
- European/Australian counterpart of Radio Shack
TUP/TUN/DUS/DUG
European transistor replacement system
Tomi Engdahls' Page
- Solid electronics projects!
Jan Freak's Page in the Netherlands
- Well thought out information. Dutch language only
Bowden's Hobby Circuits
- Collection of circuits, for everyone.
Circuit Exchange International
- Andy's website. Good selection of excellent circuits
Electronic Tutorials
- Collection of electronics tutorials.
Dolbowent.Com
- Electronic Surplus and Engineering Support.
Jordan's Electronics Page
- Lots of good circuits here also.
LED Webpage. White Led's everywhere
- Malcom's site in the UK.
Guelph Amateur Radio Club
- GARC--Official Homepage
PA3BWK's Ultimate Morse Code Website
- Wilko Hollemans site in the Netherlands
Larry's Robotics & Electronics Page
- Many good circuits
ElectronicsZone
- Naveen's Website
Spark Museum
- John D. Jenkins amazing collection of antique wireless & scientific instruments
DISCLAIMER: I take no responsibility whatsoever for the use and/or implementation thereof, or the
misuse leading to damage to equipment, property, or life, caused by the above circuits. Check with local,
provincial and federal laws before operating some of these devices. You may also check your life
insurance and/or the fact if they cover death by electrocution if you intend to play with Micro-wave
ovens and other lethal HV devices. Safety is a primary concern when working with high power circuits
or con/inverters. Play it safe!
to home page
Copyright
©
1995 - Tony van Roon. ALL RIGHTS RESERVED.
Last Updated: August 7, 2002
Alternating ON-OFF Control
by Tony van Roon
Use this circuit instead of a standard on-off switch. Switching is very gentle. Connect unused input pins
to an appropriate logic level. Unused output pins *MUST* be left open!. First 'push' switches ON,
another 'push' switches OFF. You can use 1/4 watt resistors if they are metal-film type. Any proper
substitute will work for Q1, including the european TUN's. For C2, if you find the relay acts not fast
enough, leave it out or change to a ceramic cap between 10 and 100nF.
Parts List
All resistors are 1/2 Watt and 5% tolerance.
R1 = 10K
R2 = 100K
R3 = 10K
C1 = 0.1µF, Ceramic
C2 = 1µF/16V, Electrolytic
D1= 1N4001
Q1 = 2N4401 (ECG123AP, NTE123AP, etc.)
IC1 = 4069, CMOS, Hex Inverter (14069), or equivalent
S1 = Momentary on-switch
Back to
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page
Copyright
©
Tony van Roon
Audio Pre-Amplifier
Additional Notes
(N/A)
Back to
Circuits
page
Plik z chomika:
fred1144
Inne pliki z tego folderu:
67 Electrical Engineering Handbook.pdf
(59162 KB)
52 RF Design Guide.pdf
(25837 KB)
53 The Illustrated Dictionary of Electronics(8th).pdf
(5783 KB)
59 Dictionary.pdf
(6873 KB)
43 Electricity And Electronics.pdf
(5369 KB)
Inne foldery tego chomika:
- Разные
! Осциллограф РАДИОПРОГИ РАСЧЁТЫ СПРАВОЧНИКИ
!avr test
!Измерения и константы
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