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A Main Hobbies . Boca Bearings . Modefo's RC Helicopters

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Radio - Servo - Gyro - Gov - Batt > WTB : Sensor for GV-1!!
 
 
ericd
Senior Heliman
Location: New Eagle, PA

Like a moron, I snapped off the mount tab on the sensor for my GV-1 last night. Before I buy new from Ricks or HP, I was just wondering if anyone has an extra that they would be willing to sell.

TIA

Eric...
11-09-2001 Over year old.
 
 
Ken B
Elite Veteran
Location: Phoenix, AZ

Get it here!

No need for a new sensor assy!

$5 dollars will get you a new outer case for the sensor from Great planes/hobby services. They are quick with delievery too.

hobbyservices.com

I know your pain, I did the same thing while back. I ordered 2...second one isn't for sale I know I'll bust another and getting it to Germany is tough.

Ken B
11-09-2001 Over year old.
HOMEPAGE  
 
 
ericd
Senior Heliman
Location: New Eagle, PA

Thanks!!!!

Volkul - You da man!

Thanks for the link.

Eric...
11-09-2001 Over year old.
 
 
JeffBack
Heliman
Location: Oneonta, NY

GV-1 Sensor Case Part #

Could you provide the part number for the GV-1 sensor case. I had one shap today and want to get a replacement. I agree, a spare is a good thing to have on hand.
11-19-2001 Over year old.
 
 
Mark Ryder
Elite Veteran
Location: Encino, CA

Shrink tube it

11-19-2001 Over year old.
HOMEPAGE  
 
 
ericd
Senior Heliman
Location: New Eagle, PA

Jeffback,

Just grab the phone number from the link above. They'll be able to lead you in the right direction. Just make sure the part they try to sell you is $4.50. They first tried to sell me the main case for the electronics.

Eric...
11-19-2001 Over year old.
 
 
Ken B
Elite Veteran
Location: Phoenix, AZ

Mark,

The Shrink wrap is a good idea. However I like the individual that posted this broke the dog ear mount before shrink wrapping. Makes for a bad day

Part numbers... I wrote to them and they sent them to me. I just don't have the E-mail anymore. It's real easy to just contact hobby services and get the info.

This department is the only part of Great Planes that I truly like.

Ken B
11-19-2001 Over year old.
HOMEPAGE  
 
 
Maxx
Key Veteran
Location: Shreveport Louisana

I have a complete sensor if someone needs one, I built an Optic sensor for the GV-1 and no longer need the Hall effect sensor (or the magnets, for that matter!) it triggers off a 1/2" strip of foil!!! Maxx
11-21-2001 Over year old.
 
 
BladeRunner
Elite Veteran
Location: Ontario Canada. Member of "some sort" s

GV-1 senseor?

Hey Maxx, that sounds interesting, Could you provide a few details please? Thanks-------BladeRunner.
11-22-2001 Over year old.
 
 
Maxx
Key Veteran
Location: Shreveport Louisana

Sorry about the poor response time..between Thanksgiving, putting up Christmas Stuff and Mowing the grass (yea, it was 72 here today!) I didn't check the e-mails...anyway; the sensor is easy to make, 2 Radio Shack resistors, one male Futaba lead and an Optic Sender/Receiver Sensor, plus a little wire is all you need! This Sensor (OPB703) from Allied Electronics ( 1-800-433-5700 ) is a couple of bucks and has an infrared light source and an infrared sensor mounted in the same housing. It is used in Manufacturing to count parts at high speed...what makes it cool for our use is that you mount this sensor in the heli at a distance of 1/8 " ( the focused point between the emitter and collector) and use a strip of foil (CA'd to the fan...black background) and it acts just like the stock Hall Effect Sensor without having to mount the magnets and re-balance the fan! I take a piece of G-10 and make a little board to put the resistors on...1/16" ply would serve as well or you could juse put them in-line but I like the rigidity of the circuit board design myself...coat the resistor board with Goop or the like (no silicones...they eat stuff...) and put on a piece of heat shrink tubing! That's it! I have ocluded the sensor with thick plastic to simulate the sensor getting dirty...nover got less than 93% in the sensor test screen of the GV-1. The attachment is a line drawing, much easier to use than a schematic in my opinion, e- mail me if you have questions, Helimaxx@sport.rr.com Maxx

11-25-2001 Over year old.
 
 
Heli-Driver
Elite Veteran
Location: Arlington, TX

GV-1 Optical Sensor

Maxx, that is great info... You da MAN!

I called Allied, get this they are 1 mile from my flying field... and that is only 7 miles form my house. I'm planning on going by there to pick up two sensors... They are a $1.98 each! And they told me if I go to the counter and pick them up they don't have a minimum order as I asked if there was a minimun order.

I just ordered a GV1 and I wasn't looking forward to putting the magnet in gear or fan and then balancing it... this optical method looks pretty sweet.

Gotta head to Radio shack to get some resistors, thanks so much for the info.

Raymond
12-04-2001 Over year old.
HOMEPAGE  
 
 
Scotty740
Senior Heliman
Location: Nashport, Ohio

All my fans are white. Would this work with a black stripe on a white background?
12-04-2001 Over year old.
HOMEPAGE  
 
 
z11355
rrMaster
Location: 10000 is enough time wasted.

It's a basic IR emitter/detect pair. The 'usual' optimum distance is about
4mm. You can use Digikey p/n QRB1134QT-ND which has wires already.

As to whether it will work w/ a white fan, that is a maybe bordering on yes. You might need to adjust the value of the emitter resistor a bit.
It also depends on exactly what the control box circuit looks for.
Hopefully, it looks for a change and if it does, your golden.
12-04-2001 Over year old.
HOMEPAGE  
 
 
Maxx
Key Veteran
Location: Shreveport Louisana

If it won't see the black stripe go to paintbursh on a computer and make a circle the size of your fan...color the circle black except for a 1/2" white stripe...print out on a piece of paper and affix to the fan...fuelproof to taste and Walla'...almost instant white stripe! This is what I looked at B4 deciding on a foil strip...Maxx
12-07-2001 Over year old.
 
 
JeffBack
Heliman
Location: Oneonta, NY

Does anyone see a problem with painting a stripe (white)directly on the fan housing? Am I correct in assuming the resistor choice will increase or decrease sensitivity of the photo sensor to pick up the difference in reflection from the background to the desired marking point? Thanks. We are all working towards building the better mouse trap!
12-07-2001 Over year old.
 
 
Heli-Driver
Elite Veteran
Location: Arlington, TX

The sensor...

I just got my GV-1 yesterday and the optical sensor earlier in the week.
I have the metal fan for my Raptor so I am going to paint black stripes on the bottom of the fan. I will mask it off and paint 8 black spokes evenly apart so I get an 8:1 ratio and set the GV-1 for that ratio.

Originally, I wanted to put it on the main gear but after debating it extensively here in another thread, I was convinced the fan is the place to go with it and I am confident the optical sensor will work great. My fan is a shiny polished aluminum one and it should reflect quite well. I'm thinking about shooting a few thin coats of clear to keep the aluminum from dulling out and affecting the sensor.

Thanks again to Maxx for the optical sensor info.



Raymond

Predator Gasser SE/231 X 2
Century Helicopters
12-09-2001 Over year old.
HOMEPAGE  
 
 
Dr.Ben
Elite Veteran
Location: Richmond, VA, USA

Maxx, could you go over your line drawing in darker ink and then repost it? For whatever reason, it loses clarity on my screen when it gets blown up to full viewing size.

A nice idea, BTW.


Ben
12-10-2001 Over year old.
 
 
the hitmaker
Senior Heliman
Location: ATL. GA.

HELP! HELP!

does anybody know if the jr servo 8231 and the japan version 8201 are the same servo? do they have the same specs? please some one let me know if you know because i've been searching all over trying to find out if it'll work.......i just wanna finish my freya!
thanx!!!
02-20-2002 Over year old.
 
 
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Radio - Servo - Gyro - Gov - Batt > WTB : Sensor for GV-1!!
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