LDM  

This is a very high-quality version of a regular remote control servo. It's unusual to find a brushless RC servo, let alone one with a sensored brushless motor and an encoder. You did well finding it for €1. Thank you for sharing it with us.

This is a Hitec HS-1005SGT with the label removed.

24V 200KG Brushless HV Metal Gear UAV Servo Motor Description: Operating Voltage: DC8.4V-12V-24V Size: 64*33*73.6mm Stall Torque: 200Kg.cm@12V Speed: 0.13sec/60°@12V Weight: 360g Working Frequence: 1520us/333Hz Motor: Brushless Stalling current: 10.2A @ DC12V

Hello, Very nice Video as Always, Thankyou! The Servo Electronics are interesting, mostly Chinese parts (EGMicro, XLSemi, etc), Parts that I use in my Designs too. No Overpaid Military Parts !, This is why the can be produced in such low Prices! Cheers, Konstantin

Great video Michel. I tip my hat to you SIR. Thanks

Merci pour la vidéo, Michel! Moteur triphasé, qui l'aurait pensé. Merci aussi pour la XL7005.

I am bidding on a Shahed servo on ebay, a somewhat bigger model it seems, with a connector instead of the cable going inside. Seller states it is Hitek brand servo too. He has also soviet missile electronics, in a state like if they were out of a blender sadly, nothing to see or salvage.

I've been flying RC for 30+ years. This looks surprisingly typical of a hobby grade servo, although ruggedized, it reminds me somewhat of the Promodeler servo brand, but not nearly as well made. Other commenters claim its a Hitec without a badge, but I'd be more inclined to think it's a 3rd party clone, they're all over alibaba. It would've been nice if you showed us the gearbox, I would assume it's an all metal gear train, cheaper ones may use plastic or delrin gears. Very nice ones will have stainless steel gears with bronze bushings and bearings, or even titanium gears, but I think the latter make no difference other than sounding fancy for marketing. The wiring colors for the external connectors are pretty standard across the field. I've seen 3 variations, red,black, which is self explanatory, followed by white for the signal wire. This is usually the convention for Futaba servos. JR servos usually use brown for -, red, and yellow for signal. Hitec uses the the scheme seen in this specimen. The hobby ones use a dupont connector, which can be flimsy, so it's easy to see why they upgraded that. In the hobby world, I would expect this to be marketed as a high voltage digital brushless servo. High voltage in this case means 7.2v nominal, usually supplied by a 2 cell lipo battery. Smaller servos typically run on 4.5V, which was the nominal voltage for 4 cell NiCd batteries back in the day if I remember correctly. 600us to 2400us is a very typical range, however, in many hobby transmitter systems the default range is slightly less, to allow for the option to expand the range. 1500us is usually considered the center point of the servo. I'm impressed with how quiet this servo is, as many digital servos make a very obnoxious PWM whine even when idle, usually the cheaper ones. Also, this one has really good resolution. For a "high" quality servo I would expect to see 330hz PWM rates, but I've seen as high as 560. A servo of this size would be used in giant scale RC planes, 30% or larger scale. Or for very large RC trucks. Overall, looks like a pretty decent servo, and I wonder how much Iran is paying for them. Great job with your channel, keep up the good work. As a pilot I love learning the more intimate details of our instruments that are often overlooked in our training.

Simple and effective!

super cool.

Would be interesting to see the repeatability with a dial indicator or some such device... Thanks for the video !

€1 was kind of a steal for this, new they cost about €100 for an off-label and €400 for the Hitec servo what this is.

At 10:17, if the circuit you are talking about that you don't know the purpose is the TV1 BAT54S dual Schottky diode, it is used to clamp the signal to 0V/+3.3V (actually -0.3V/+3.6V)

Sir please do more schematic analysis 🙌🙌🙌

I wonder which frequency these drone use? And how is the maximum range of the transmitter? The commercial transmiters (e.g. FUTABA) only have 1500 m, and I am shure the drone transmitters gets over more than 10 Km... Nice video! Greetings from Argentina!

Excuse me sir, I have a question. At 7:30, you say that a capacitor in parallel with the MOSFET's gate resistor accelerates the FET's conduction. Could you explain why? I'm learning about electrical engineering and I haven't heard about that before. Doesn't any capacitance in the gate's signal trace cause the voltage to rise slower, prolonging the period in which the gate is only slightly past the threshold voltage and heating it up? Is there a reason why an added capacitor there would increase the speed of turning the FET on? Thank you for this very thorough video, I learned a lot watching it and wasn't expecting any more than a closeup shot of the PCB.

wonderful video. thank you for sharing. Where do you buy this stuff? eBay?

Like. that is excellent ~ bye. Le! ))

Hitec HS-1005SGT THX for schema :)

A construçao parece ser resistente.

That servo is Hitec or Smilar Chines copy that you can find at Hobbyking.

So satisfying to see that Iranian engineers use NATO standard connectors...

👍👏👏👏

Looks to be a copy or an OEM of a HiTec HS-1005SGT (the picture of the burnt out servo is of a different type of servo)

From where did you buy it?

seems like an expensive rc servo usually used for expensive rc models

Интересно.

At 3:10, the protection varnish you see on the PCB is "conformal coating" (en.wikipedia.org/wiki/Conformal_coating )

Could you decap the microcontroller to get an idea if it is really an ST or some clone/fake part?

Could you also check out the Turkish drone Bayraktar TB-2 ?

يقال ان محرك الطائرة هو في الاساس للدراجات النارية😊

I wonder why they build their own servos? Is it because they need more torque than a commercial one? Also it's interesting they need a microcontroller from ST and an opto-isolator from Toshiba both of which are or soon will be sanctioned by the US and prevented from shipping to Iran. Most of the rest of the semiconductors are from Chinese suppliers, i.e. inside the Russia/China/Iran bloc. Of course it's possible they're confident in their ability to get hold of parts from ST and Toshiba and/or have a warehouse full of them. The linear regulators also seem a bit low tech/inefficient compared to switch mode but maybe it doesn't matter. The whole thing does seem like it would be pretty cheap and reliable. And they can always do a version without the Western bloc parts if they run low. E.g. a Chinese RISC-V or unlicensed ARM controller fabbed in China.

Там действительно необходимо усилие в 200кг?

Looks nearly identical to some of the servos I've seen in very expensive RC stuff. I'd be interested in how torque-y it is. Perfect Pass makes a 56 kg servo that size with the same aluminum housing. It's truly a monstrous servo,

Merci beaucoup Michel ....le schèma est superbe exclus le systeme hall de comutation ...je pense quils ont decide comme ça pour eviter des algorithmes de commutation bases sur la force contrelectromotrice des bobines stator ou ça compliquerait le programme avec un sac d'interrupts..

😮How You get that.Very interesting,continue,great videos.But be carefull with this information.

If you consider the ground as the little antennas then int can be controlled by the artilery from a distance by the same device....froma mobile station or radar detection of drones...

HS-1100WP with the HS-1005SGT case

De fabricação chinesa?

I am surprised that they can get away with using hall sensors for motorfeedback only, I guess because of the relatively high gear ratio in the servo. Still, you'd guess that a magnetic encoder as an absolute position sensor is just as expensive, but enables you to use sinusoidal commutation.

Hello, super vidéo, un servo comme ça pour 1 € ! je suis preneur c'est où ?

Travail incroyable ! Merci pour votre travail acharné! De tels drones kamikaze finissent souvent dans des maisons ukrainiennes paisibles sans être abattus. La guerre électronique ne les affecte pas ; il est difficile de brouiller les communications par satellite. Une arme efficace. Nous attendons plus d'avis sur des équipements similaires. Très intéressant. Viva la France, Gloire à l'Ukraine

The wires look so thin. Anyone?

Such expensive components on a kamikaze drone... I don't know man, even though I'm an engineer and I understand military standards, this seems a bit overkill.

Who would sell anything for 1 euro? Make a gift - possible, but selling... i would not even go to post office to ship it for 1 euro

The drops is made by England university and European.that say human right don't want isalamic regim gone because have benefit to them.

You got it dead cheap if it works😂

Proper pronunciation is Ka-mi-KAH-zee, emphasis on the third syllable …

شاهد ۱۳۱ ایرانی .

copy of a Volz servo.

Until someone builds a complete RC plane with free parts, salvaged from Ukraine ;-)

This was truly a fascinating reverse-engineering effort for something designed to blow itself up. None of the parts appeared to meet Western requirements for military components. It really didn't seem "mil-spec" at all. It looks like the sanctions are working and if this is the highest level of components they can get, I truly fear the same substandard parts are used in something like a long range high-yield missile. Even the electronics in the the simplest missiles in the West have to be top notch, tested to death and mounted to housings looking like true engineering artwork. I guess if this cheap junk works, it's "good enough" for Iran. I think the drones that civilians can buy are better quality than what I saw you take apart. I really enjoyed seeing this cheaply designed and built war relic come to life. VERY nice schematics! They don't even care enough to sand off the top of the semiconductors to remove their markings. Could have been a school project for teenagers that got elevated to a workable state.

Stop fooling others....its just 25Kg torque servo...its available online

It is a bloody Hitec Servo from Korea

En Français serait plus compréhensible qu’en Anglais baraguiné.

PLEASE tell you spent more time dumping the code on the controller. THAT IS WHERE THE MEANINGFUL FORENSIC STUDY LIES!!!

Гераньку испортили (

Неплохое лекарство для украины

Way too much Western stuff makes it to Russia and Iran. It's a Korean commercial servo. Also the connectors must be stopped.

🇷🇺🇷🇺🇷🇺👍

Откровенмя от старого мусорщика из украинской свалки... Как маленький ребёнрк удивляется разного рода механическим деталям и конструкциям. Очевидно он живёт за счёт этого мусора, или валяет дурака...

отличная Геранька!