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Thread: Reliable Source for MG90S

  1. #1
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    Reliable Source for MG90S

    Hey all, new to the community so apologize for this basic question, but I'm having a difficult time finding a reliable source for this servo. I've asked Ralph to print up the RD3 and I think I've picked up everything else I need beside this one.

    A quick google search shows some supplies off Amazon, but others have warned of counterfeits which is the same reason I was steering clear of eBay.

    Hobby King has one that's advertised as "Turnigy", rather than Tower Pro. AdaFruit has the MG90D rather than MG90S. Bang Good (who the heck is this even) advertises one but some YouTube reviews call them out as counterfeit, so back to square one. Value Hobby and GetFPV are also out of stock, though I've no idea how reputable they are so perhaps that's a good thing. Jsumo is in stock but they ship via registered air or DHL so I suspect that's probably an international shipper which again brings me back to point 1.

    I'm sure I'm overthinking this and can probably just pick any old one off eBay, but I have limited electrical knowledge to begin with so anything that reduces the possibility of having to troubleshoot is good by me.

    Thoughts, even if it's to tell me I'm overthinking this, are appreciated.

  2. #2
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    It's kindof a crap shoot... Almost every "Tower Pro MG90s" that I have purchased, counterfeit or not, has functioned well enough to do the job. Some work great, others have a little jitter, some move with more authority, but for the most part they work. These servo's are cheap, roll the dice and grab one, if you're not happy with it try another.
    As long as those other brand servo's fit into the opening on the RD3 they should work, though I cannot confirm fitment on any of them. I know the sister servo "Tower Pro SG90" does NOT fit, so, another crap shoot on fitment...
    I created the Roto Damper, RD3, HMv4.2 sliding back case, "air-burner" and the "ping-pong" valve in my quest for delicious "set and forget" BBQ.

  3. #3
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    I know the Hobby King Turnigy branded MG90S is not the same servo measurement wise.

    I get mine straight from Tower Pro, but you'll have to send them an e-mail to order, as there is no "cart" item for them on their website. Last time I ordered, I got 20 for $4.20/ea so not sure what price for 1 would be from them.

    http://www.towerpro.com.tw/product/mg90s-3/

    EDIT: Just found the old invoice. With shipping and "PayPal Fee", my purchase came out to $5.54/ea. i don't think you're going to get a deal from them if you want just one, as these ship from China via DHL.
    Last edited by WBegg; 12-04-2018 at 02:24 PM.

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    Thanks both - I was actually thinking about purchasing from Hobby King. Really glad you mentioned something. I didn't even think about ordering from Tower Pro directly. Just assumed they didn't sell directly to consumer anymore. I'll probably pick one or two off eBay/Amazon and hope they work, like Ralph said. If all else fails I'll reach out to Tower Pro directly.

  5. #5
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    Try Digi-Key. Just noticed they currently have 6 in stock @ $9.95 each, Shouldn't be too much for shipping?

    https://www.digikey.com/products/en?keywords=MG90S

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    Quote Originally Posted by WBegg View Post
    Try Digi-Key. Just noticed they currently have 6 in stock @ $9.95 each, Shouldn't be too much for shipping?

    https://www.digikey.com/products/en?keywords=MG90S
    Awesome find. Picked up two, just in case. Shipping was cheap @ $3.75.

    Definitely more expensive than Amazon/eBay, but perhaps worth it. Time will tell.

  7. #7
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    Also, i would suggest installing a capacitor (47uF or such) across the servo power. I install mine in the jack itself. It tends to calm down any spastic movements of the servo.

    [IMG][/IMG]

  8. #8
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    I have a question with this, I just pinned my MG90 for the barrel servo and it goes nuts when I connect to my HM. If I make both timing settings 0 us then it sits still, but any number above it will chatter and do full 360 degree rotations at various intervals. You think this is a problem the way its connected to the jack or should I meter out the board and make sure my solder work is correct?

  9. #9
    TVWBB Honor Circle Bryan Mayland's Avatar
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    I would try putting a capacitor across the 5V and GND wires at the servo end like WBegg suggests in the post above yours. Even if you're not using a punchdown jack it can definitely reduce or eliminate the crazy uncontrollable servo effect.
    I'm that HeaterMeter guy what ruins everybody's free time.

  10. #10
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    Good deal Ill give that a whirl. I used a molex connector to create a pigtail of sorts for grounds of the servo and the fan so I didn't have to punch down two wires into jack . Wonder if that has anything to do with it as well

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