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Exp.Helicopter clutch

 
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AMERIPOND(at)cs.com
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PostPosted: Mon Jan 30, 2006 7:32 am    Post subject: Exp.Helicopter clutch Reply with quote

Hi any one know of circuitry that would show a clutch in transition I have a
light at full up and full down but would like to see a light indicating
movement..there is a micro switch for engage and disengage for those red and green
indicator lights, but I can't figure out how to make the switches show
travel..with like an amber light. I bought Bob's book but no help....JimL


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aerofabco(at)juno.com
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PostPosted: Mon Jan 30, 2006 9:03 am    Post subject: Exp.Helicopter clutch Reply with quote

Jim, what I think you are looking for is pretty easy.

You have simple microswitches operated at the ends to operate
Red and Green LEDs and want an Amber LED if neither Red
nor Green is on / lighted ?

My first thought is a differential amplifier using a bi-directional
LED --- it lights Red for current flow (voltage differential) in
one direction, Green for the opposite condition, and both R & G
elements ( pseudo-Amber ) if the two inputs are the same.....
but these bi-color LEDs are often awkward to discern the color,
so I think I'd want the three separate LEDs instead.

You might use a packaged logic gate, OR variety: I'll doodle a
bit and get back to you with a discrete components schematic.
( This will actually be the components inside the OR gate. )

With the OR gate, the two inputs A & B would be connected
to the "hot" side of each microswitched-LED. The OR gate
output C would be pulled-up via the amber LED.

"If either ( A OR B ) goes high (R or G lighted) output C is high
and the Amber LED is not lighted."

"If both ( A OR B ) are low (R & G not lighted) output C is low
and the Amber LED lights."

Neat thing about Logic is its flexibility --- an AND gate, a NAND
(not-AND), a NOR (Not-OR), etc. can all be used easily to get
the light-on / off you are wanting.

A good, real electronics parts store ( NOT radio shack ) will have
Spec Sheets and Truth Tables for their line (Brand) of devices that
will identify the right pin #'s on the logic gate IC package you
choose.

Good luck,
a r t the Aero Fabrication Company
Winston-Salem, NC
On Mon, 30 Jan 2006 10:30:10 EST AMERIPOND(at)cs.com writes:
Quote:


Hi any one know of circuitry that would show a clutch in transition
I have a
light at full up and full down but would like to see a light
indicating
movement..there is a micro switch for engage and disengage for
those red and green
indicator lights, but I can't figure out how to make the switches
show
travel..with like an amber light. I bought Bob's book but no
help....JimL




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dennymortensen(at)cableon
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PostPosted: Mon Jan 30, 2006 11:11 am    Post subject: Exp.Helicopter clutch Reply with quote

One way you could maybe do this is to use a slider type of potentiometer
hooked to the linkage. This would act as a variable voltage divider. Then
all you need is a circuit that would read the voltage and display it on a
bar graph display. I started tinkering with something like this a while back
but never finished it out. I am planning on using something like this on the
landing brake on my Cozy. If your interested I could dig up what info I have
and send it to you?
Denny

--


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flying(at)videotron.ca
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PostPosted: Mon Jan 30, 2006 4:34 pm    Post subject: Exp.Helicopter clutch Reply with quote

Hello Jim,

Here are two simple suggestions:

1/ If you are looking for some kind of "in transit" indicator, you
could use two relays (low power), one powered from the full-up switch,
the other from the full-down switch.

When neither of them is activated, the amber light is powered (through
the Normally Close relays contacts). As soon as the full-up or full-down
switch powers its associated light, its relay open the circuit to the
amber light and the amber light turns off.

2/ If the micro-switchs are SPDT type (single pole - two positions), it
*could* be possible to to add the amber light without any relay.

I could send you a simple hand drawn schematic.

MB
AMERIPOND(at)cs.com wrote:

Quote:


Hi any one know of circuitry that would show a clutch in transition I have a
light at full up and full down but would like to see a light indicating
movement..there is a micro switch for engage and disengage for those red and green
indicator lights, but I can't figure out how to make the switches show
travel..with like an amber light. I bought Bob's book but no help....JimL










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AMERIPOND(at)cs.com
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PostPosted: Mon Jan 30, 2006 5:41 pm    Post subject: Exp.Helicopter clutch Reply with quote

Thanks Art...Jim.Lynch

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AMERIPOND(at)cs.com
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PostPosted: Mon Jan 30, 2006 5:43 pm    Post subject: Exp.Helicopter clutch Reply with quote

Denny , always interested in thinking outside the box...Jim Lynch

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AMERIPOND(at)cs.com
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PostPosted: Mon Jan 30, 2006 5:56 pm    Post subject: Exp.Helicopter clutch Reply with quote

Matin, that would be great...Thanks in advance Jim Lynch

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