Anyone out there have the Sena SMH10?

Discussion in 'Equipment' started by sixsevenfive, Mar 24, 2010.

  1. danham

    danham Been here awhile

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    Thanks Cataract. I forgot all about the 5.0.1 update.

    -dan
  2. Rider

    Rider Moderator Emeritus Super Moderator

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    Just got my Sena SMH10-11 on Thursday and have now done two rides with it.
    Overall impressions: very, very, very good. :clap :thumb
    The Wife hasn't joined me yet so don't know how the intercom function will be, despite us talking to one another in the living room the other night with our helmets paired. :lol3
    My iPhone 5 works beautifully with it: easy to pair and I just tap the phone button and tell Siri who to call and it's done. Fantastic! :nod
    Speaker volume is good, if not great, but that may be a matter of repositioning them within the helmet just a little bit. I spoke on the phone with my wife this morning, going 70, and she said it sounded clear as a bell. It's taken me a few times to get the boom mic positioned where I want it but I think I've got it down.
    My only "problem" so far is that I was unable to get the Sena Device Manager to recognize either of our units. It's probably more on my end: I'm using a complete P.O.S. old XP laptop I bought for $40.00 from my company (after they imaged it) and despite my best efforts, malware, adware and other malcontent crap is constantly running on it. :bluduh
    Other than that, I am very pleased so far. I'm just running my old non-Bluetooth Ipod via wire and it's not bad and phone calls work pretty well.
    Next up (when the weather gets warmer for my fair-weather wife), the intercom.
    I'll let you know how that goes. :thumb
  3. TBickell

    TBickell Been here awhile

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    Is the 5.0.1 a very recent update? Like in the last few weeks?
  4. Cataract2

    Cataract2 Where to?

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    Almost a month old now. If you plug your Sena into your computer the device manager will tell you what software version it has.
    SMH10 Firmware 5.0.1

    Download Latest Firmware

    The latest update : March 31, 2014
  5. GreyThumper

    GreyThumper Been here awhile

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    Thanks! Updating now!
  6. ADW

    ADW 'tard bike restos

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    Dan, I truly promise I'm NOT trying to be an internet dick about this, but why is the sidetone a great addition for you? I have it activated on mine and can't see what the value is in it. I know what I said, I don't need to hear myself saying it. What is it about the sidetone that is a great addition for you?
  7. danham

    danham Been here awhile

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    No offense taken; it may not be a useful feature for you.

    I find that people often over-modulate signals by speaking too loudly into mics and too close to them. I'm not immune from that myself. Years of listening to public service radio transmissions (police, fire etc.) as a newspaper guy revealed that lots of folks just don't know how to talk into a mic properly.

    Sidetone really helps with this. If you sound distorted and over-modulated to yourself, you probably sound that way to the other folks too. So I like being able to monitor my own level and as more people adopt sidetone they will be easier for me to understand too.

    Bell Labs did a ton of work on this, getting just the right amount of sidetone to guard against people shouting into telephones and "swallowing" the mouthpiece, resulting in garbled speech.

    -dan
  8. GreyThumper

    GreyThumper Been here awhile

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    Same here. Ever since I switched on the sidetone feature, I realized that I didn't need to speak so loud (I had a tendency to talk louder the faster I rode, when it's apparently not needed because of the noise filters).
  9. ADW

    ADW 'tard bike restos

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    Got it. Thanks.
  10. Desert Penguin

    Desert Penguin Farts Are Funny

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    has any one had any luck powering a sena unit off of an external battery pack? I have read that the unit doesn't respond to take a charge from these.

    going on a week long trip and want to charge the units over night in the tent and the idea would be to charge the usb power block off the bike while riding during the day and then plug the 2 sena's into the external usb power block and have them charge while sleeping. Any ideas?
  11. danham

    danham Been here awhile

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    Nope. I tried this with my Targus 4800 mAh battery pack, which works fine with my iPhone and iPad, and it just will not stay connected to charge my Sena gear (SR-10 and SMH-10).

    I cannot figure out what the problem is, but something seems to prematurely trigger the Targus function which makes it think the Sena gear is charged and current stops flowing. By premature I mean several minutes into the charging process. Total fail.

    In a jam I can power & charge the SMH-10 (the SR-10 battery appears to last forever) from my bike while riding.

    -dan
  12. slartidbartfast

    slartidbartfast Love those blue pipes

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    Find a place to hide/lock the units on the bike and charge them from the bike battery overnight.

    If you park the bike close enough to the tent, you could make a long 12V cable. Back in the days before long-lasting white LED lights were so easy to come by, I used to have a 20-foot cable I could plug a 12V flourescent inspection lamp into. Not especially heavy or bulky (probably less than the external battery pack + charger, etc.)
  13. Woodcock

    Woodcock Been here awhile

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    I let mine charge in my tank bag off the bikes batt. Along with phone and camera, plenty of batt left for cranking next day.
  14. TowPro

    TowPro Lets ride

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    Do you charge your Sena off your bike during the night? I would expect it to put a dent in the motorcycle battery charge.
    Its charging 1 amp @ 5 or 6 V. Guessing its 50% efficiency for the USB power conversion from 12 to 5 V, you might be drawing 1A per unit from your motorcycle battery.

    They do make a 12V cable to run the SR10 from the bike. Its not a standard USB cable, it must be wired a little different (not to standard) because a standard USB cable will put the SR10 into Data mode. Not sure if that same cable works with the SMH10.
  15. slartidbartfast

    slartidbartfast Love those blue pipes

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    I believe the SMH-10 has a 500mAh battery, so even if you assume it's totally flat and the charging process is only 50% efficient, for a full charge it will only draw ~1Ah from the available charge in the battery. I can assure you I have charged 2 of them plus a couple of cell phones off my bike overnight and never had a noticeably low bike battery, nor would I expect to.
  16. danham

    danham Been here awhile

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    slart, I think you have mixed up amps and hours a little. While I agree that you can probably safely charge an SMH-10 with a bike battery, here's what I think is the right analysis (warning: I'm a math atheist).

    If it takes an amp to charge the Sena rig, and you plug it in for one hour, you have indeed only "used" one amp of a typical bike battery's 12 amp-hours. If you leave it plugged in, and if it draws one amp the whole time (it doesn't), the battery would be totally flat after 12 hours.

    The reason you are not having trouble with your setup is that I don't think the charger is quite as inefficient as 50% and also the charge tapers as the Sena battery charges.

    But I've been wrong before ...

    -dan
  17. slartidbartfast

    slartidbartfast Love those blue pipes

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    You are correct (and I'm a physicist by education so I ought to know better). In fact, at ~50% efficiency, charging a 3.4V lithium battery with 500mAh capacity from a 12V+ battery, should draw no more than about 300mAh from the larger battery. In reality, an SMH-10 is probably less than half discharged at the end of a day's riding and the charging process is probably a bit better than 50% efficient, so you'd likely be looking at "taking" 100mAh from the bike battery. For a typical 18Ah bike battery that's 1/180th of the available charge or maybe 1/100th of what you could draw before you might experience starting problems. Even if you have a lower capacity LiPO battery in the bike (as I now do,) charging a few small mobile devices from it will not have any real effect. (A couple of laptops might be a different story.)

    BTW - there's NO WAY the charger is delivering 1A to the SMH-10. That would fully charge it in about 30 minutes (or set it on fire)
  18. GAVic

    GAVic Largely unnoticed

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    Yea I have one and it works great. It's a mophie brand that I picked it up at best buy. I have had my Sena go dead on me twice. Once on an all day ride it died about 30 minutes before we got to our final destination. Another time when I had forgot to charge it the night before a ride and had used it all week just around town.

    In both instances I just dropped the battery pack in my jacket pocket and plugged the Sena into the battery pack and kept riding, everything worked great.
  19. lmychajluk

    lmychajluk Long timer

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    I always charge the SMH10 off the bike, never via AC/USB charger. Usually plug it in if I've been using it a lot, or can't remember the last time I've charged it. I'll leave it plugged into the bike in the garage for multiple nights (sometimes even a week or two) between rides and have never had a problem starting the bike.
  20. BlueLghtning

    BlueLghtning Riding is my passion

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    We charge several things off our bike batteries at night (SMH10 included) and never have an issue. Usually its the SMH10, GoPro battery or two, regular camera, and our cell phones. We don't charge them all at the same time and they don't always need charged each night but usually between the time we get to camp and before we go to bed, most of that stuff is charged at some point. The headsets are usually last and we leave charge over night.

    If you get to camp early enough, the headset can probably fully charge before you even go to bed so you can unplug it.