Constructing a "delay" into a system?

R

richg99

Guest
OK I can solder, and 50 years ago took an RCA Electronics course so I could
fix b&w TV's. Since then, not too much electronical has happened around me!

I now fly some lightweight, foam Radio Controlled airplanes Every now and
then, due to "operator error"... I put one down in a cornfield or some other
undesirable place. Finding the darn things can be a problem.

Some people have purchased a "beeper" that sounds off when the plane stops
running. They run about $15.00 each. I have six planes...I'd rather build my
own if I can do it cheaper and it would work the way I want it to.

I read about another guy putting a buzzer/beeper into his plane that beeps
all of the time. I don't want to hear a beeper going all of the time, but
wouldn't mind an intermittent "beep" every now and then. Today, I visited
my local Radio Shack, where they sell things, but they actually don't know
anything about them.

I bought a 12 vdc ( range 3.0 to 20 vdc) 10ma..at 12 v beeper item #06P08 or
maybe #273-0059. It has a great sound when plugged into my 8 volt Lipo
battery. Its single "beep"would do the job...if....

Now, what I need is some way to time that beeping. What is the simplest
circuit that I could solder up; connector my motor's battery when I get
ready to fly...and have it "beep" intermittently while flying? Thanks for
any help. regards, Rich
 
richg99 wrote:

[snip

I bought a 12 vdc ( range 3.0 to 20 vdc) 10ma..at 12 v beeper item #06P08 or
maybe #273-0059. It has a great sound when plugged into my 8 volt Lipo
battery. Its single "beep"would do the job...if....

Now, what I need is some way to time that beeping. What is the simplest
circuit that I could solder up; connector my motor's battery when I get
ready to fly...and have it "beep" intermittently while flying? Thanks for
any help. regards, Rich
Click to expand...
An 8-pin 555 timer IC, two resistors and two caps, will do it:

http://home.cogeco.ca/~rpaisley4/LM555.html

The 'astable oscillator' schematic is the one you want.

Googling on '555 timer' will find you all kinds of info on
this really versatile device.

HTH
 
On Tue, 26 Aug 2008 20:39:23 -0500, "richg99"
<rich99sue@sbcglobal.net> wrote:

OK I can solder, and 50 years ago took an RCA Electronics course so I could
fix b&w TV's. Since then, not too much electronical has happened around me!

I now fly some lightweight, foam Radio Controlled airplanes Every now and
then, due to "operator error"... I put one down in a cornfield or some other
undesirable place. Finding the darn things can be a problem.

Some people have purchased a "beeper" that sounds off when the plane stops
running. They run about $15.00 each. I have six planes...I'd rather build my
own if I can do it cheaper and it would work the way I want it to.

I read about another guy putting a buzzer/beeper into his plane that beeps
all of the time. I don't want to hear a beeper going all of the time, but
wouldn't mind an intermittent "beep" every now and then. Today, I visited
my local Radio Shack, where they sell things, but they actually don't know
anything about them.

I bought a 12 vdc ( range 3.0 to 20 vdc) 10ma..at 12 v beeper item #06P08 or
maybe #273-0059. It has a great sound when plugged into my 8 volt Lipo
battery. Its single "beep"would do the job...if....

Now, what I need is some way to time that beeping. What is the simplest
circuit that I could solder up; connector my motor's battery when I get
ready to fly...and have it "beep" intermittently while flying? Thanks for
any help. regards, Rich
Click to expand...
I flew an RC model aircraft into a stand of woods near my home. The
controller had the tail motion reversed, and it went over a bunch of
trees and crashed into a fairly large area of trees. I was looking for
it by occasionally revving the motor, which I could hear in the
distance. I managed to find it hanging from a branch on tree on a 45
degree slope. I was able to dislodge it, barely.

So, I feel your pain.

However, compare the cost of the $15 beeper against the cost of the
aircraft. In fact, it costs less than a battery pack. You also need to
ensure that it won't drain your battery, beep all the time, and that
it'll actually be loud enough to use to find the thing.

Regards,
Bob Monsen
 
On Aug 26, 6:39 pm, "richg99" <rich99...@sbcglobal.net> wrote:

Some people have purchased a "beeper" that sounds off when the plane stops
running. They run about $15.00 each. I have six planes...I'd rather build my
own if I can do it cheaper and it would work the way I want it to.
Click to expand...

The dollar stores here have watchfob gizmos that respond to a whistle
by beeping loudly (to find your keys if they're misplaced). With the
money
you save, a boating store will sell you an air horn to interrogate
your downed aircraft in style.
 
richg99 wrote:
OK I can solder, and 50 years ago took an RCA Electronics course so I
could fix b&w TV's. Since then, not too much electronical has happened
around me!

I now fly some lightweight, foam Radio Controlled airplanes Every now
and then, due to "operator error"... I put one down in a cornfield or
some other undesirable place. Finding the darn things can be a problem.

Some people have purchased a "beeper" that sounds off when the plane
stops running. They run about $15.00 each. I have six planes...I'd
rather build my own if I can do it cheaper and it would work the way I
want it to.

I read about another guy putting a buzzer/beeper into his plane that
beeps all of the time. I don't want to hear a beeper going all of the
time, but wouldn't mind an intermittent "beep" every now and then.
Today, I visited my local Radio Shack, where they sell things, but they
actually don't know anything about them.

I bought a 12 vdc ( range 3.0 to 20 vdc) 10ma..at 12 v beeper item
#06P08 or maybe #273-0059. It has a great sound when plugged into my 8
volt Lipo battery. Its single "beep"would do the job...if....

Now, what I need is some way to time that beeping. What is the simplest
circuit that I could solder up; connector my motor's battery when I get
ready to fly...and have it "beep" intermittently while flying? Thanks
for any help. regards, Rich
Click to expand...
You could build this circuit:
http://www.electronic-circuits-diagrams.com/lightsimages/1.gif

It will work from 12 volts. Substitute the buzzer for
the LED in the diagram.

Alternatively, this idea might work for you: put a blinking
LED (Radio Shack #276-312) in series with the buzzer.

Ed
 
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