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Rocket finder .. beepers?

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GalantVR41062

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I was able to stick a zip tie threw the clear heat shrink and use a fishing snap for attachment onto the recovery harness.

I then soldered up the charge/trigger harness, using the red for power, 7.2v for charging and 3.7v for trigger. And black for ground.

It just takes a quick connect/ disconnect of the 1s battery that puts the unit into recovery mode.

Having the photo sensor onboard should turn into a flashing blue light until apogee or main event then turn into the 100db noise maker it is. Needless to say if there is a failure to separate then it will remain silent and be of no help finding the lawn dart.

I am waiting for a warmer not cloudy day to go launch a few rockets now that the lakes have frozen over and test this thing out.

~John
 

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K'Tesh

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I also picked up a 'toy' microphone with a parabolic dish, thinking that it would be easy enough to do a sweep while walking. Haven't tried it in the field yet. Has anyone else?
Estes used to sell a transmitter and receiver back in 1993, the Estes Transroc II (EST 2237).



There is also an old line of kids toys with a name like "SpyTech", that may have had a parabolic microphone as well.
 
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Sooner Boomer

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I also picked up a 'toy' microphone with a parabolic dish, thinking that it would be easy enough to do a sweep while walking. Haven't tried it in the field yet. Has anyone else?
I'm too cheap to buy something. I use the core out of a paper towel roll. Pressed against the ear, it gives extremely good directionality. I guess if it were the right length, it would also resonate/amplify the beeper frequency.

HA! Just thought of this:

 

shockie

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I was able to stick a zip tie threw the clear heat shrink and use a fishing snap for attachment onto the recovery harness.

I then soldered up the charge/trigger harness, using the red for power, 7.2v for charging and 3.7v for trigger. And black for ground.

It just takes a quick connect/ disconnect of the 1s battery that puts the unit into recovery mode.

Having the photo sensor onboard should turn into a flashing blue light until apogee or main event then turn into the 100db noise maker it is. Needless to say if there is a failure to separate then it will remain silent and be of no help finding the lawn dart.

I am waiting for a warmer not cloudy day to go launch a few rockets now that the lakes have frozen over and test this thing out.

~John
John:

How's this working out?. You have a schematic drawing on how you got it set up ?
 

GalantVR41062

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I have not been able to test in flight but here is what I have.

The vifly comes with a adapter harness to connect to a drone. Simple 3 wire connector. Red is positive, black is negative, yellow us some kind of control or signal wire which is not used in my setup.

I made a adapter harness off the red/black to a male pin connector.

I use this harness to charge the unit from a 2s lipo battery pack, then with a 1s lipo to trigger the unti into recovery mode before loading the rocket and launch.

20210117_101323.jpg
 
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shockie

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I have not been able to test in flight but here is what I have.

The firefly comes with a adapter harness to connect to a drone. Simple 3 wire connector. Red is positive, black is negative, yellow us some kind of control or signal wire which is not used in my setup.

I made an adapter harness off the red/black to a male pin connector.

I use this harness to charge the unit from a 2s lipo battery pack, then with a 1s lipo to trigger the unti into recovery mode before loading the rocket and launch.

View attachment 446697
If I was to purchase the parts and shipped them to you and paid for shipping back, would you be willing to make me one? I could even pay you $20 for your time. All I would need from you is a parts listing.

I still don't understand how this is actuated, ie the buzzer buzzes.... could you explain that to me insteps perhaps? I'm sorry to be so dense.
 

GalantVR41062

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Sure no problem.

I have the unit charged or charging from a 2s lipo battery. There is a battery on board, then as I unplug the battery it senses the loss in power at the plug (lost power on a drone) and goes into its recovery mode.

Then the beeper started beeping full 100 some Db. To disable the noise and light push and hold the button on the side for 5 seconds to turn it off.

I see Apogee sells a mini becon for similar money now.

 

Mike Haberer

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The best.

LOUD.

Light.

Small.

Sold & made by a great guy.
I've used the Pratt beacon three times, so far. The battery fell out the first two times. The first time the rocket lawn darted, so I didn't think anything of it. The 2nd time was a perfect flight, still fell out. You HAVE to wrap tape around the battery, the rubber bracket is too flexible. Note that it is not too loud (and says so on the website) The warbling is supposed to make it more hear-able, but my old ears didn't pick it up too well. If your hearing isn't good, don't buy it, unless your sending kids to chase it down.
 

Mike Haberer

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If the specs are correct, the Mini is very heavy at 2.8 oz. The Micro looks better for LPR at about 0.5 oz.

I've been threatening to get some beepers for my rockets for two years now, haven't pulled the trigger. Maybe for next year's flying season.
I bought all of the Transolve models, just haven't used them yet. The MicroTransBeep is small enough it can fit in smaller rockets (maybe BT-50, BT-55 for sure). It is not enclosed on either end so needs to be protected from ejection charges. The BeepX and MiniTransBeep are bigger, BT-55 absolute minimum. The BeepX is 31g, the MiniTransBeep 2.8 oz (9V battery, i.e., heavy). They are both bare boards that will need to be protected from ejection charges as well. They look like they are intended to be included in an AV bay. I haven't noodled how to do that yet without dampening the sound too much in a SD rocket. It is going to be an experimental effort.
 

Mike Haberer

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Sure no problem.

I have the unit charged or charging from a 2s lipo battery. There is a battery on board, then as I unplug the battery it senses the loss in power at the plug (lost power on a drone) and goes into its recovery mode.

Then the beeper started beeping full 100 some Db. To disable the noise and light push and hold the button on the side for 5 seconds to turn it off.

I see Apogee sells a mini becon for similar money now.

This is the Pratt Microbeacon. See my reply to another post in this thread.
 

Sluggo

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Hrm put one in my 'cart' and went to check out and got a warning "This is not a secure site, you should leave this page immediately" ! ?
Ya. I've been seeing that on different sites. LOC Precision being one of them. It makes me cynical. 2 nights ago my computer did an upgrade and when it restarted my password was gone. And, microsoft had my phone number wrong. Called for support and a recording directed me to go online for help. Go figure..... Rant over. I hope you got through to order your beeper.
 

Philip Tiberius D.

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I have Pratt & Transolve, both work well while in the Air and if you are close - Transolve is a bit louder and has the photo cell to activate once out of the tube OR timer after 20 minutes.
 

hball55

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The best.

LOUD.

Light.

Small.

Sold & made by a great guy.
I still have a Surefire II 12-volt ni-cad battery ignition system that Doug sold me twenty years ago. The ni-cads are still going strong despite sitting for years at a time without use. I like his products, especially the ejection canisters.

wow, just went to his site, first time back in years, and he has scaled back quite a bit. No more ejection canisters.
 
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