I am looking for someone who knows how to modify a wavecomm jr into
a scanner that scans 2.3ghz to 2.7ghz. If no one knows how to I am
willing to purchase one that has already been turned into a scanner.
My e-mail address is Livinlarge365@....
Thank you.

wow just bought a recharger for 40 bucks and recharger 2 packs of
nickel metal hydride batteries for my handheld tv, wow took like 16
hr to charge. use the batteries and it only last for like 3.5 hrs how
long should nicke metal h batteries last for on my handheld tv. man
the good thing is at least u can recharge em for like 1000x's but
damn the batteries are $$ 26 bucks for a 4 pack at radioshack in
canada. do they have better batteries or a battery for the handheld
tv since the handheld tv uses a lot of electricity. what kind of
batteries should i use for my handheld tv or devices that drain ur
battery fast. the sales guy said nickel metal hy was my best choice
so i took it and bought it. i wished it could have ran like 100 hrs

I have just joined this forum and I want ideas/techniques for modyfing
my old Tektronix 491 SA to give me a centre frequency readout.
I have purchased a kit which is a LCD PIC controlled interface and I
wish to modify it to read as a frequency readout, possibly to 50 MHz
without a prescaler, (the SA will display up to about 5 GHz).
I wish to know what prescaler chips or circuitry are available out
there to handle such a high frequency?
If anyone has any ideas or has built such a counter I would appreciate
such tips
Thanks
Bernard 1471 (GI4HDJ)

Greetings all,
Hope someone can lend a hand...I have a 12 volt DC motor .9amp this
runs from 110v household current to a switching power supply 110-12v
dc 3.25 amp...I need to put in a variable resisitor to slow the motor
down when needed (12v runs 44 rpm...9v 30rpm etc)...any ideas on
where to find this? I tried calling a company who sold a 12v 4amp dc
dimmer, but they claimed it would not work with a motor...I don't
know why.
Peace
Jay

Nikel Metal Hydride (Ni-MH) is your best bet currently for your
device. However, Ni-MH batteries with higher mAh last longer than the
lower mAh ones. You may need Ni-MH batteries with more than 2000mAh
for your handheld tv. For faster charging time, you need to buy a
more powerful charger, some chargers take less than 1hr to fully
charge 4 or more batteries. You can have better deal online or even
eBay... Good luck.
--- In home_electronics@yahoogroups.com, "adriane"
<canucks_92000@y...> wrote:
> wow just bought a recharger for 40 bucks and recharger 2 packs of
> nickel metal hydride batteries for my handheld tv, wow took like 16
> hr to charge. use the batteries and it only last for like 3.5 hrs
how
> long should nicke metal h batteries last for on my handheld tv. man
> the good thing is at least u can recharge em for like 1000x's but
> damn the batteries are $$ 26 bucks for a 4 pack at radioshack in
> canada. do they have better batteries or a battery for the handheld
> tv since the handheld tv uses a lot of electricity. what kind of
> batteries should i use for my handheld tv or devices that drain ur
> battery fast. the sales guy said nickel metal hy was my best choice
> so i took it and bought it. i wished it could have ran like 100 hrs

In general a resistor, variable or otherwise, is NOT the way to vary
the speed of a motor. Resistors waste energy through heating and with
any reasonable size of motor the resistor gets quite large and
expensive (and difficult to find). Also the motors tend to stall out
especially when starting and at low speeds. A better way to vary the
speed is to use a pulse width circuit, using a power transistor to
make/break the circuit. This lets you vary the speed of the motor,
maintains quite a bit of torque and lets the motor start even at low
speeds. It is also much more efficient. You can make a simple pulse
width controller from a 7556 or 7555 CMOS timer IC (see the "Files"
section of this group for a data sheet for this timer IC) or there
are dedicated motor control ICs available (do a search for motor
control IC). Kits are also available at:
http://www.electrokits.com/electronic-kits/motor-control/75.htm

Regards
xxxtoytech

--- In home_electronics@yahoogroups.com, "Jay Stanley"
<jaystanley@c...> wrote:
> Greetings all,
> Hope someone can lend a hand...I have a 12 volt DC motor .9amp this
> runs from 110v household current to a switching power supply 110-
12v
> dc 3.25 amp...I need to put in a variable resisitor to slow the
motor
> down when needed (12v runs 44 rpm...9v 30rpm etc)...any ideas on
> where to find this? I tried calling a company who sold a 12v 4amp
dc
> dimmer, but they claimed it would not work with a motor...I don't
> know why.
> Peace
> Jay

--- In home_electronics@yahoogroups.com, "quantum8760"
<avion105@y...> wrote:
>  Would anyone know how to demagnetize the reception of a radio. Any
> comments would be helpful.

Can you rephrase the question?  I have no idea what it means to say
that a radio's "reception" is "magnetized".  If English is not your
main language, post in the language you're most fluent in (in
addition to English) and perhaps we'll be able to figure out what you
mean.

A.J.

Hello those out there?

My Takada Air cooler model sy-07a just went defective. Initially it
was just the water pump that cause the 1A fuse to blow. I could find
an exact one and decide to buy one that the hose can connect to. Now
one transistor and a resistor was burn. I think it is because of
power rating of the pump. The original was rated 8.5W and the one i
replace was rated 11w. I also think that the tranistor and resistor
is some kind of motor driver circuit. I think the resistor is
connected to the base of the transistor and the other end go the the
controller board. but it is burn and i don't know the value of it.
Just next to it, is a same transistor with a 560 ohm connected to
the base. Can i safely assumed the same value? the marking on the
transistor is as follow:
MAC
97A6
222
can i assumed that it is a 1n222 transistor? Or what sort of
transistor can i replaced it with. Can i changed them to cater for
the higher rating of the water pump? Can anyone out there please
help?

Regards,
Arick

the name's Philip and i'm over in toronto, ontario, canada.

i tinker with electronics and have built a couple things from books,
of course, expanded and modified the base design when i could.

i come here with a problem... would anyone know how to set up a dot
matrix display with LEDs?


my project; i want to figure out a way to decode the data signal sent
from my cd player [ imp350, slimx by iriver ] then display the
information on a large board that can be read from across the room.


thank you for your time, and i hope to learn a lot!

Kindly note that I am an amateur have not any knowledge about
electronics. I have problem in my house. I need to detect water
level because water always come out from my water tank.

I want using radio frekuasi.

sorry my english is very bad.

jalakang,

Here is a simple water activated alarm that you can possibly build yourself.
http://www.zen22142.zen.co.uk/Circuits/Alarm/walarm.htm

I have read that there are "bath alarms" that are available to be purchased.
They must tell you when the bath water is about to overflow.  Good luck,

> sorry my English is very bad.

No problem my friend. :~)

Tom  Iowa  USA
+   +   +

----- Original Message -----
From: "jalakang" <jalakang@...>
To: <home_electronics@yahoogroups.com>
Sent: Saturday, August 28, 2004 9:17 PM
Subject: [Electronica] remote water level detector


> Kindly note that I am an amateur have not any knowledge about
> electronics. I have problem in my house. I need to detect water
> level because water always come out from my water tank.
>
> I want using radio frekuasi.
>
> sorry my english is very bad.

I am working on a data acquisition system to acquire data from a
gamma detector(NaI)using avr atmega128L microcontroller. it is to be
used as an multichannel analyzer with 1024 channels. could somebody
help with the microcontroller code, Assembler or Plain C, on how to
acquire the data and  then send the acquired data to a PC via RS232
connector at 9600 baud rate for anaysis. voltage range of signals is
0V-2.56V.

do i need a max232 IC when using the STK300+ development board with
the atmega128L microcontroller connecting to a PC?

Hi guys.

For a university project I am building a system based on 802.11b WLAN. Im using
the Maxim MAX2820 chipset.

My question is the following: the RF MAX2820 accepts I/Q signals as input. I
need to give the RF section data to send over the air. My goal is to get this
data from  a PC. For example, I will write software to package the data and
basically stream it to the PC output and this will be converted to I/Q and
passed to the RF section. Problem is, how do I do this??

What does it involve if using the PCs USB ports to get data in and out?

An option is to use a USB-serial RS232 emulator chipset. This way I get USB
drivers from the manufacturer. Then the USB will appear as a virtual com port.
This is easier to program and will be much faster than a regular serial or
parallel port. The catch is that this is an expensive method.

Apparently RS232 is already analog so I will need to convert to my baseband
specs for input - 8MHz and 400mV P-P. How can I do this?

My goal is to be able to achieve 1Mbps throughput with minimal error. For
example, I will test it by sending a 125MB file over the link in approximately
100 seconds.

Any thoughts?

Thanks in advance

Jeff Hinds
Univ. of Pretoria
South Africa

I have a rectangularish signal that is on for 1 microsecond and this
event occurs every millisecond (1 kHz). I have to switch many of
these signals into a microprocessor, basically one right after
another. I want to send this recieved signal to an A to D convertor.
I have a peak detector (op amp in series with a diode) but what
happens is if I use a large capacitor to peak detect the signal it
will be too slow to peak since ideally, I would like to read the
value and then be onto the enxt one as fast as possible. If I use a
small capacitor, there seems to be enough reverse leakage or
something so the signal will not hold peak value, becuase, I am
guessing the peak value is on for such a short time compared to the
total time. I need to sample the magnitude of the signal. I also was
going to use an integrating ciruit for the on time to get a value but
this complicates things. Anyone have an alternate or better idea. to
capture the peak of a signal that has a very low duty cycle?

I have several large transformers taken out of UPS's.  There are no
indications as to output voltage or amperage.  Are there any clues
to let me know?

I've tried to wire both of them up to the power that came in the
largest of the 2 UPS's.  It has a breaker but I don't know its
rating.  When I plug the power cord in, the lights in my shop dim
and the breaker blows (on the UPS not my shop).

Neither of the transformers were originally wired directly into the
power cords, but were, instead, plugged into logic boards that were
in turn plugged into the power cord.

I want to build a power supply to cut blue foam with wire, can I use
either of the transformers that I've got?

Did my shop lights flicker off because the transformer is too much
for shop's wiring?  or was it because of the breaker in the UPS body
that was responsible?

Thanks for your help!
Chuck

test

The reason your lights dim and the breaker trips are that the device
you've connected to the circuit is drawing more power than the
breaker can handle (assuming the breaker is not faulty). Since you
don't have any specs for the transformers I would suggest that you do
not use them.

For wire foam cutting I would suggest that you get the wire first,
usually nichrome wire (an alloy containing nickle and chromium) then
build the power supply. You can control the temperature of the wire
by using AC power and varying it with a triac control (plenty of
these on the internet).

This guy uses a doorbell transformer, a light control (triac type)
and a guitar string to cut foam!
http://www.dansworkshop.com/Hot%20wire%20foam%20cutting.shtml

You can also get thin nichrome wire from old hair driers. For short
pieces of this stuff you can experiment by powering short pieces up
with D cells placed in series.

Regards
xxxtoytech
--- In home_electronics@yahoogroups.com, "true_blue_texican"
<cjackson@w...> wrote:
> I have several large transformers taken out of UPS's.  There are no
> indications as to output voltage or amperage.  Are there any clues
> to let me know?
>
> I've tried to wire both of them up to the power that came in the
> largest of the 2 UPS's.  It has a breaker but I don't know its
> rating.  When I plug the power cord in, the lights in my shop dim
> and the breaker blows (on the UPS not my shop).
>
> Neither of the transformers were originally wired directly into the
> power cords, but were, instead, plugged into logic boards that were
> in turn plugged into the power cord.
>
> I want to build a power supply to cut blue foam with wire, can I
use
> either of the transformers that I've got?
>
> Did my shop lights flicker off because the transformer is too much
> for shop's wiring?  or was it because of the breaker in the UPS
body
> that was responsible?
>
> Thanks for your help!
> Chuck

--- In home_electronics@yahoogroups.com, "true_blue_texican"
<cjackson@w...> wrote:
> I have several large transformers taken out of UPS's.  There are
> no indications as to output voltage or amperage.  Are there any
> clues to let me know?

How large is "large"?

> I've tried to wire both of them up to the power that came in the
> largest of the 2 UPS's.  It has a breaker but I don't know its
> rating.  When I plug the power cord in, the lights in my shop dim
> and the breaker blows (on the UPS not my shop).
>
> Neither of the transformers were originally wired directly into
> the power cords, but were, instead, plugged into logic boards that
> were in turn plugged into the power cord.

This is a clue... some UPSs above a certain size use a ferroresonant
transformer, which must be driven by special circuitry.  Outside of
a UPS, those transformers are probably useless.

> I want to build a power supply to cut blue foam with wire, can I
> use either of the transformers that I've got?

Apparently not.  How long do you need the wire of your cutter to be?
I've used a cutter with wire about 4 inches long that was powered by
a pair of D cells.  You don't need very high current or voltage just
to cut foam.

> Did my shop lights flicker off because the transformer is too much
> for shop's wiring?  or was it because of the breaker in the UPS
> body that was responsible?

It's because the transformer is not meant to be connected directly
to mains power.  Making changes like this to systems that you don't
understand can be very dangerous.  What if the transformer had
exploded or caught fire when you powered it up?

A.J.

Howdy all-


I'm doing some archive work and I am attempting to install an old
version of Logical Devices CUPL Total Designer/WIN V4.7A...
would/could anyone who might have the install disks or install file
set lurking around help me out?

I need three files from or an image of distribution disk #12---

Fit1500.EX_
Espresso.EX_
Flexfit.EX_

Help would be greatly appreciated.

Many thanks

On Sunday 03 October 2004 08:31 pm, dalmudlee wrote:
> Hi Group Members,
>
> After the demise of Heathkit, does anybody know of a resource for someone
> interested in that type of electronics hobby?  My preference would be kits
> for micro I/O interfacing.

I would suggest snagging a copy of NutsNVolts magazine and browsing the ads...

Circuit Cellar magazine http://www.circuitcellar.com/ has an
advertising section that lists companies that sell stuff for micro
I/O interfacing. Quite a few have evaluation kits for their products.
A few companies exist that provide small, simple kits (cost $5 and
up) that sell through electronics hobby stores. One is
http://kitsrus.com/ that has some microprocessor stuff and lots of
interesting items. I got an IR movement detector for use in an
animated sign for $15.

Regards
xxxtoytech

--- In home_electronics@yahoogroups.com, "dalmudlee" <pfourier@m...>
wrote:
>
>
> Hi Group Members,
>
> After the demise of Heathkit, does anybody know of a resource for
someone interested in that type of electronics hobby?  My preference
would be kits for micro I/O interfacing.
>
> THX
> Lee

Hi all. I am new to this group and fairly new to electronics. I was
hoping someone may be able to help me with a UHF transmitter and
receiver. All I really need is the schematics for the "bare bones"
components. What I want is to simply be able to turn a device on and
off using UHF signals. A range of about 150 feet would be ideal and
it is desired to keep the physical size as well as the power source
and usage of the receiver to a minimum. What are the concerns with
the FCC in such a device? Any help would be greatly appreciated.
Please respond via e-mail to: Silverwolf_jlc@... Thank you
again.

Josh

Hi All,
I am joining a couple of e-mail groups in hopes of finding someone
that can help me. My 12 year old son is into the Junkyard War scene.
Ever since he was tiny he has loved motors, pulleys, rockets, power,
circuitry, remote control cars and planes, gadgets and gizmos, etc. I
need to just get him a box of spare parts and let him go to work. He
loves to tinker and invent. The trouble is I don't know ANYTHING about
this area. I am hoping that you all will be willing to share your
favorite books, websites, resources, magazines, indispensable items,
catalogs, WHATEVER. I could spend hours pouring over the list of
science books Amazon has and still get the wrong ones. I hope that you
can get me pointed in the right direction so that I can help this
budding inventor on his way. Thank you VERY much in advance. Debbie

Hello all:
I am new to this group, and have dabbled in electronics off and on
for years.  Now that I am retired, I have more time to get serious
about my hobby, and I have a question:

How does one calculate the Q of a radio tank circuit?
Any help would be most appreciated.
Barry

--- In home_electronics@yahoogroups.com, "palmerjoss001"
<dlcotts@h...> wrote:
>
>
> Hi All,
> I am joining a couple of e-mail groups in hopes of finding someone
> that can help me. My 12 year old son is into the Junkyard War scene.
> Ever since he was tiny he has loved motors, pulleys, rockets, power,
> circuitry, remote control cars and planes, gadgets and gizmos, etc.
I
> need to just get him a box of spare parts and let him go to work. He
> loves to tinker and invent. The trouble is I don't know ANYTHING
about
> this area. I am hoping that you all will be willing to share your
> favorite books, websites, resources, magazines, indispensable items,
> catalogs, WHATEVER. I could spend hours pouring over the list of
> science books Amazon has and still get the wrong ones. I hope that
you
> can get me pointed in the right direction so that I can help this
> budding inventor on his way. Thank you VERY much in advance. Debbie

Impressive to see kids taking a serious interest in technical matters
rather than spending their time playing video games. I thought I was
the only 10 year old kid interested in electronics and that was back
in the 1980s.

It is difficult to describe where to go next for your son. Most of the
  technical books I read as a kid and teenager are long since out of
print so you won't find them on Amazon and I don't know off hand of
any good technical books for the under 16 age group. The Art of
Electronics by Horowitz and Hill is a definite must to anyone serious
about electronics but it may be too technical for a 12 year old.

As for spare parts, they can be salvaged cheaply from old machinery,
electrical appliances and cars. Ask around locally or check out
household waste sites as they often have plenty of old electrical
equipment and household appliances.

See your local public library for useful reference books; find out
what level of theory he can understand. You might also look at this
book
http://www.arrl.org/catalog/?item=NO-HB2005
by the American Radio Relay League. You should shop around for a
couple of books on basic electronics theory; get an age appropriate
one. Also a blank notebook to write down his data, tests and
experiments in. He should try to learn the basic schematic symbols as
quickly as possible and basic electronic theory (i.e. Ohm's law).
Learn the resistor color code, the metric system and the proper
abbreviations for all the common units (ampere, farad, watt etc.)
Make sure he has proper tools and knows how to use them safely. By
proper tools I mean ones that are high quality to begin with and are
kept that way. He won't need very many to begin with.
Unfortunately there are fewer magazines out now about electronics. I
can recommend Circuit Cellar for excellent articles but it does
require some basic knowledge about computers, programming and
electronics. See Electronics World magazine also at:
http://www.softcopy.co.uk/electronicsworld/
It is a British magazine that has stuff for amateurs.
Depending upon how much money you wish to spend I can suggest a
couple of other things you might want to get.

-a digital multimeter (measure voltage, resistance etc.)
-a lab power supply (cuts down on $$ for batteries and is safer than
AC)
-a soldering station

Regards
xxxtoytech

--- In home_electronics@yahoogroups.com, "palmerjoss001"
<dlcotts@h...> wrote:
>
>
> Hi All,
> I am joining a couple of e-mail groups in hopes of finding someone
> that can help me. My 12 year old son is into the Junkyard War scene.
> Ever since he was tiny he has loved motors, pulleys, rockets, power,
> circuitry, remote control cars and planes, gadgets and gizmos, etc.
I
> need to just get him a box of spare parts and let him go to work. He
> loves to tinker and invent. The trouble is I don't know ANYTHING
about
> this area. I am hoping that you all will be willing to share your
> favorite books, websites, resources, magazines, indispensable items,
> catalogs, WHATEVER. I could spend hours pouring over the list of
> science books Amazon has and still get the wrong ones. I hope that
you
> can get me pointed in the right direction so that I can help this
> budding inventor on his way. Thank you VERY much in advance. Debbie

At 17:59 10-10-2004, you wrote:

This site can help you a bit,

http://www.discovercircuits.com/front/list.htm

You will find some good circuits in there.

About the books, you will have to bye a book about the principles of
electronics, something that helps you in the different components that one
circuit have. Perhaps one book about electricity,

Now the most important "NEVER LET HIM TRY THE CIRCUITS ALONE", the circuits
may be safe, but there is allot of things that can happen. One capacitor
placed with the polarity inverse can blow up, so play good attentions wen
you are setting up the circuits.
But don't be scared with electronics, it can be fun and some times very
intriguing, but first you must learn the principles of electronics.

One more thing, there are some parts/circuits that you are not able to do
by your self, so try to find a local electronics shop in the area, perhaps
they can help you , or suggest one alternative way.







>Hi All,
>I am joining a couple of e-mail groups in hopes of finding someone
>that can help me. My 12 year old son is into the Junkyard War scene.
>Ever since he was tiny he has loved motors, pulleys, rockets, power,
>circuitry, remote control cars and planes, gadgets and gizmos, etc. I
>need to just get him a box of spare parts and let him go to work. He
>loves to tinker and invent. The trouble is I don't know ANYTHING about
>this area. I am hoping that you all will be willing to share your
>favorite books, websites, resources, magazines, indispensable items,
>catalogs, WHATEVER. I could spend hours pouring over the list of
>science books Amazon has and still get the wrong ones. I hope that you
>can get me pointed in the right direction so that I can help this
>budding inventor on his way. Thank you VERY much in advance. Debbie
>
>
>
>
>
>
>
>
>
>Electronics:
><http://inginerie.protectia-mediului.ro/engineering/electronics>http://ingineri\
e.protectia-mediului.ro/engineering/electronics
>Translation, Web Design, Marketing & Advertising: MultiMedia Ltd,
><http://www.teleactivities.com>http://www.teleactivities.com
>
>
>Yahoo! Groups Sponsor
>ADVERTISEMENT
><http://us.ard.yahoo.com/SIG=129jhok79/M=295196.4901138.6071305.3001176/D=group\
s/S=1706058037:HM/EXP=1097517454/A=2128215/R=0/SIG=10se96mf6/*http://companion.y\
ahoo.com>
>click here
>
>[]
>
>
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AAAHH yes, the ARRL Handbook. I found one of those at a Library book
sale for $2 when I was first starting to mess around with electronics
around 1987. The book was about 7 years old when I got it, but I kept
that handbook until it was lost during one of the many moves my family
made when I was around 17 - 18 years old. At one point while I was
studying electronics in school the handbook even gave me formulas to
figure out some things that was twice as fast as what the formula the
instructor told us to use, that got me in trouble more than once,
because everyone in my class wanted to use my formula's and not the one
given by the instructor, even tho the answers were the same every time.

This is for sure a book that would be an invaluable resource.

A real good website for everything from general information all the way
to embedded controllers and microprocessors is

http://www.epanorama.net/index.php especially this part
http://www.epanorama.net/links/basics.html for people just starting into
electronics.

my 2 cents.

-------------------------------------------------------------------------
Bryan Vest
ComNet Inc.
bright.net Network Administration/Network Operations
-------------------------------------------------------------------------



------------------- wrote:

>See your local public library for useful reference books; find out
>what level of theory he can understand. You might also look at this
>book
>http://www.arrl.org/catalog/?item=NO-HB2005
>by the American Radio Relay League. You should shop around for a
>couple of books on basic electronics theory; get an age appropriate
>one. Also a blank notebook to write down his data, tests and
>experiments in. He should try to learn the basic schematic symbols as
>quickly as possible and basic electronic theory (i.e. Ohm's law).
>Learn the resistor color code, the metric system and the proper
>abbreviations for all the common units (ampere, farad, watt etc.)
>Make sure he has proper tools and knows how to use them safely. By
>proper tools I mean ones that are high quality to begin with and are
>kept that way. He won't need very many to begin with.
>Unfortunately there are fewer magazines out now about electronics. I
>can recommend Circuit Cellar for excellent articles but it does
>require some basic knowledge about computers, programming and
>electronics. See Electronics World magazine also at:
>http://www.softcopy.co.uk/electronicsworld/
>It is a British magazine that has stuff for amateurs.
>Depending upon how much money you wish to spend I can suggest a
>couple of other things you might want to get.
>
>-a digital multimeter (measure voltage, resistance etc.)
>-a lab power supply (cuts down on $$ for batteries and is safer than
>AC)
>-a soldering station
>
>Regards
>xxxtoytech
>
>--- In home_electronics@yahoogroups.com, "palmerjoss001"
><dlcotts@h...> wrote:
>
>
>>Hi All,
>>I am joining a couple of e-mail groups in hopes of finding someone
>>that can help me. My 12 year old son is into the Junkyard War scene.
>>Ever since he was tiny he has loved motors, pulleys, rockets, power,
>>circuitry, remote control cars and planes, gadgets and gizmos, etc.
>>
>>
>I
>
>
>>need to just get him a box of spare parts and let him go to work. He
>>loves to tinker and invent. The trouble is I don't know ANYTHING
>>
>>
>about
>
>
>>this area. I am hoping that you all will be willing to share your
>>favorite books, websites, resources, magazines, indispensable items,
>>catalogs, WHATEVER. I could spend hours pouring over the list of
>>science books Amazon has and still get the wrong ones. I hope that
>>
>>
>you
>
>
>>can get me pointed in the right direction so that I can help this
>>budding inventor on his way. Thank you VERY much in advance. Debbie
>>
>>
>
>
>
>
>
>
>Electronics: http://inginerie.protectia-mediului.ro/engineering/electronics
>Translation, Web Design, Marketing & Advertising: MultiMedia Ltd,
http://www.teleactivities.com
>Yahoo! Groups Links
>
>
>
>
>
>
>
>
>
>

Debbie:

I have an 11 year old son with these interests myself. (Just as I
also was stricken with solder-fever around the same age)

As far as books you really can't go wrong with anything by the
esteemed Forrest M Mims III. He presents what could be some very dry,
boring reading in such a way that the (very important) theory becomes
enjoyable hands-on practice and easy to understand. Radio Shack used
to carry many of his books back before they exclusively became a cell-
phone vendor. Sadly you will probably not be able to walk right into
the Shack and buy one anymore. You will probably have to have them
order one. Although - a better bet may be to see if Amazon.com
carries his books.

I might also suggest one of the Radio Shack experimenter labs. They
come with a variety of components, have a built-in prototyping area
and power supply, and come with a book with much information and
exercises. I bought my son the 300-in-1 lab for christmas 2 years ago
and he still uses it frequently.

On the web I would recommend the Electronics-Tutorials website:
http://www.electronics-tutorials.com/site-tree.htm

As has been said already: the underlying theory is indespensible.
Ohm's law, Watt's law, SI units, and such all must be learned.

Hope some of this helps!

--
Best regards,
Patrick Griffin
www.RedBinary.com


--- In home_electronics@yahoogroups.com, "palmerjoss001"
<dlcotts@h...> wrote:
>
>
> Hi All,
> I am joining a couple of e-mail groups in hopes of finding someone
> that can help me. My 12 year old son is into the Junkyard War scene.
> Ever since he was tiny he has loved motors, pulleys, rockets, power,
> circuitry, remote control cars and planes, gadgets and gizmos, etc.
I
> need to just get him a box of spare parts and let him go to work. He
> loves to tinker and invent. The trouble is I don't know ANYTHING
about
> this area. I am hoping that you all will be willing to share your
> favorite books, websites, resources, magazines, indispensable items,
> catalogs, WHATEVER. I could spend hours pouring over the list of
> science books Amazon has and still get the wrong ones. I hope that
you
> can get me pointed in the right direction so that I can help this
> budding inventor on his way. Thank you VERY much in advance. Debbie