Promark GPS Shadow Drone - Page 8 (2024)

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Jun 09, 2018, 09:16 PM

  • #106

theoztreecrasher

theoztreecrasher

Registered User

Quote:

Originally Posted by RICH S

I've had a few others and for $180 I am really impressed with this drone. The camera,FPV, RTH, follow me all work great,stays really locked in on the GPS. I suspect the firmware has limited it to 400ft. but that OK. I only whish it had BL motors, the ones in it look like 370's, I may have to stock up on a few. I get all of 12 min in low wind and can charge the thing with my charger in about a hour. I've been doing a lot of FPV cruising, when I get lost it always returns to home nicely. It's also kinda nice knowing you don't have $1000 wrapped up in it.

I've not had mine apart, but I believe the motors are the same as for Syma X8 series quads - 132 plug in types.

The 400feet/120 meters ceiling is the limit. Check the settings in the app.

Edit... For motor changing go to youtube & search for Holy Stone Toy - HS100(GPS)-How to replace the motor.

Last edited by theoztreecrasher; Jun 12, 2018 at 05:03 AM.

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Jun 16, 2018, 08:51 PM

  • #107

RICH S

RICH S

Registered User

400 ft. is great, I can capture and explore nicely at those altitudes. This little drone has grown on me, it pretty much does all you ask of it. The wifi is not all that great, but you still get a good perspective of flying. With the brushed motors, it really shines in low wind conditions and the flight time is almost 15 min. I like the app as well, lets you know gps strength, you can geofence etc. It's a noisy devil, on a calm day I can still hear it at max altitude, kinda nice with the goggles on (you know it still therePromark GPS Shadow Drone - Page 8 (1)) I have the P70 as well, only creature comforts is auto land and alt hold, I whish you could get a GPS plug in upgrade for it. Not as nice but it's fun to play with and keeps your skills honed.

Jun 18, 2018, 08:53 PM

  • #108

MDRhoades

MDRhoades

Registered User

I bought this drone slightly used for $80 from a guy on Offerup.com.
At $80 bucks I was very skeptical that it would be any good.
It worked great out of the box first time. After 4 or 5 flights it started to become erratic and would suddenly loose power and no amount of throttle would keep it stationary.

Being an electronics engineer specializing in wireless comms I of course had to fix it. My impression was somehow the wireless command link was getting interference and thought it needed WI-FI antennas on the quad and the remote. I reviewed the earlier posts on this forum, disassembled the quad and remote and added new antennas. The problem actually got worse. I disassembled the quad and inspected the main board. I finally found the root cause for the bad behavior. The board had an electrolytic capacitor near one of the ICs that went through the board. During the assembly process they did not trim the long leads off and one was bent over and arcing against the "+' power bus that feeds the FET motor drivers causing loss of voltage.

I tried to remove the bad FET no dice. The components are glued down.
So I ordered a board from a seller on Amazon. Pulled the old board and soldered in the new board. Started a test flight. The quad takes off tilts sharply and crashes. Diassambled the quad and tested the board. It was good found a bad motor.

By the way Holy Stone HS100 is the same quad. Amazon again...order 4 new motors. Replaced all the motors. Test flight. It flies again but still unstable. fish bowling and cant hold altitude.

Disassembled again. Inspected the GPS receiver board. Board is good. Flipped it over and inspected the antenna. The antenna is called a ceramic patch antenna. The antenna has a small metal pin in the center goes through the ceramic block underneath and connects to the circuit board. The pin is soldered on the ends of the pin. I found the solder cracked around the pin on the antenna side. Testing it with my meter confirmed the connection was bad (found several ohms of resistance). I resoldered the pin on both ends. Reassembled the quad. Test flight. Yeah it works! Very stable altitude holds.

One last problem though...I crashed enough time that the quad stopped transmitting video. I damaged the camera or WI-FI board in the camera. Ok....this time e-Bay saved the day. I found a new camera for $29.00 on e-Bay (Amazon HS-100 camera was $60). I replaced the camera.

Test flight. Camera works. Quad works. Finally the quad fly reliably and has decent video (720P) . Not bad but does not compare to a $800+ DJI.

Jun 18, 2018, 09:11 PM

  • #109

MDRhoades

MDRhoades

Registered User

To summarize: The Promark GPS shadow is a nice capable quad with GPS for the money; when it works.
There are three main electronic components.
1. GPS receiver
2. Main board
3. Electronic gyro.

The components are proprietary and if they fail you can only replace them with an OEM component.
I have attached a pic of the ceramic patch antenna.

This quad has finally started working reliably.
It has taught me a lot about quadcopters, how they fly and how well even cheaper ones can perform when everything works right.
Promark GPS Shadow Drone - Page 8 (2)Promark GPS Shadow Drone - Page 8 (3)Promark GPS Shadow Drone - Page 8 (4)Promark GPS Shadow Drone - Page 8 (5)

I now plan to build my own quadcopter with brushless motors, a high performance controller board, GPS, and a good quality remote control the near future.

- Mike

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Jun 20, 2018, 06:29 PM

  • #110

RICH S

RICH S

Registered User

I don't think I would ever buy a used quad, people fly over waterPromark GPS Shadow Drone - Page 8 (7) I got mine from wally world with the 2 year $14 insurance, they will give you a replacement, not bad 2 years of flying for under $200. I also let things cool down in between flights, I have about 25-30 on mine so far. I'm actually cruising with the FPV goggles as well, a better resolution camera would be great, but I still get the full effect of flying. An $800 machine would be tough to loosePromark GPS Shadow Drone - Page 8 (8)

Jun 20, 2018, 08:36 PM

  • #111

Rural Flyer

Rural Flyer

Registered User

@MDRhoads

Glad to hear you got it all worked out...

The cold solder on the GPS is a handy tip, and one I ll try, as I have a few HS100 's and one is doing that exact thing... Toilet Bowl swirl in larger spirals when left to hover in place.,.

Thanks !

Jun 24, 2018, 04:41 PM

  • #112

RICH S

RICH S

Registered User

I have a stable mate for my Shadow, the Vivitar Sky View, I'm still getting used of the controls and features and it's starting to show promise. The shell is a rubberized type plastic, feels very durable. It has follow me and a circle me feature, they don't give a lot of instruction on the app and I think there is a lot more in it. It has the google map feature you can do a split screen with, and there is also way points in it. The software is a little more complex, but it flies nice and GPS lock is very good. Same price as the Shadow and I did a 3 year warranty from Wally for $19. It does not have the moveable camera like the Shadow. All in all pretty nice budget quadPromark GPS Shadow Drone - Page 8 (9)

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Jul 10, 2018, 07:26 PM

  • #113

tamasic1

tamasic1

Registered User

The RC Saylors review another version of this same drone here:

Double GPS Camera Drone - SJRC T70W - TheRcSaylors (20 min 32 sec)

Jul 12, 2018, 04:37 PM

  • #114

Jwesinc

Jwesinc

Registered User

I just got my drone and the drone Turns in but the remote controle will not turn on no matter how long I charge it... please help

Jul 17, 2018, 09:35 AM

  • #115

Rural Flyer

Rural Flyer

Registered User

There is a small 150ma 1cell Lipo in the TX/Controller... it may have a bad solder joint, but if you "Just" bought it new, why putz about, send it back...

Sep 04, 2018, 06:47 PM

  • #116

OJD77

OJD77

Registered User

When I place the battery in the Promark GPS Shadow Drone and turn on the power, the lights fade in and out slowly, white up front, blue in the back. All I have read and seen says it should be a flashing red until the remote is powered on and the initialization is started. However, when I start attempting the initialization there is no response. Any ideas?

The only thing that I saw that might be a problem was the battery, but I charged it fully and got the same response. Any help is appreciated.

Sep 08, 2018, 02:01 PM

  • #117

RICH S

RICH S

Registered User

Quote:

Originally Posted by OJD77

When I place the battery in the Promark GPS Shadow Drone and turn on the power, the lights fade in and out slowly, white up front, blue in the back. All I have read and seen says it should be a flashing red until the remote is powered on and the initialization is started. However, when I start attempting the initialization there is no response. Any ideas?

The only thing that I saw that might be a problem was the battery, but I charged it fully and got the same response. Any help is appreciated.

I have a Shadow and really like the thing, I have probably 150 or so flights on it out to 400 ft. with great video. Turn your drone on, turn your transmitter on, push the throttle stick up and down (it's now initialized), now push both sticks out and up then push both sticks up and in, rotate it a few times in standard upright position then rotate it holding it by the bottom of the skids and put back on the ground, the blue/white lights will go solid. You are now ready to fly ( no app has been touched yet). NOW, initialize the app, if you initialize the app before the drone, it will show a dead battery on your phone. Hope that helps. You can't beat the features on this thing for the price, mine has a lot of trouble free air time on it .

Sep 08, 2018, 09:04 PM

  • #118

theoztreecrasher

theoztreecrasher

Registered User

Quote:

Originally Posted by RICH S

I have a Shadow and really like the thing, I have probably 150 or so flights on it out to 400 ft. with great video. Turn your drone on, turn your transmitter on, push the throttle stick up and down (it's now initialized), now push both sticks out and up then push both sticks up and in, rotate it a few times in standard upright position then rotate it holding it by the bottom of the skids and put back on the ground, the blue/white lights will go solid. You are now ready to fly ( no app has been touched yet). NOW, initialize the app, if you initialize the app before the drone, it will show a dead battery on your phone. Hope that helps. You can't beat the features on this thing for the price, mine has a lot of trouble free air time on it .

Yep, I'd have to second that. I have the SJRC version and particularly like the fast & simple calibration sequence compared to my Bayangtoys X16 brushless GPS unit. Cons are the brushed motors (but I have a lot of Syma X8 spares) and the proprietary battery with its fairly short flight/long charge times. But I'm working on that! Promark GPS Shadow Drone - Page 8 (11)

Sep 15, 2018, 06:36 PM

  • #119

RICH S

RICH S

Registered User

Quote:

Originally Posted by theoztreecrasher

Yep, I'd have to second that. I have the SJRC version and particularly like the fast & simple calibration sequence compared to my Bayangtoys X16 brushless GPS unit. Cons are the brushed motors (but I have a lot of Syma X8 spares) and the proprietary battery with its fairly short flight/long charge times. But I'm working on that! Promark GPS Shadow Drone - Page 8 (12)

I charge the batt with my rc car charger, spare batts are available through Walmart, and you can easily rig a connector for another 2 cell battery. Promark GPS Shadow Drone - Page 8 (13)

Sep 19, 2018, 12:37 PM

  • #120

Rghdesigns

Rghdesigns

Registered User

I have a P70 Shadow Drone and everything works great EXCEPT it only goes forward so far and then its stops and goes back, its weird like it hits a wall or something and then goes back a bit, i mean i keep trying and it keeps stoping and then goes back, has anyone had this problem and if so how to i fix it? i am out on 8 acres so. i dont see it being any interference

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