iRobot Scooba experience

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thewiseone

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Pls correct me if i'm wrong... my EE very rusty here but i believe freq is only important for certain AC applications. DC has no cycles, so the freq cycle shouldnt be an issue. As for your friend's fried Roomba, how did he conclude that its due to the diff in AC freq?

Really, u can rest assure that the diff in AC supply freq will not kill / potentially harm your Roomba's charging circuit. U are safe to use a decent step down transformer. ;)

i'm not an electronic gurus to be honest, so I would leave the explanation to the experts (and maybe to refute that), but it has been documented before that some appliances are designed for certain frequencies. And I did have one engineer friend who had his Roomba charging circuit 'fried'.
 

zenkinz

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Pls correct me if i'm wrong... my EE very rusty here but i believe freq is only important for certain AC applications. DC has no cycles, so the freq cycle shouldnt be an issue. As for your friend's fried Roomba, how did he conclude that its due to the diff in AC freq?

Really, u can rest assure that the diff in AC supply freq will not kill / potentially harm your Roomba's charging circuit. U are safe to use a decent step down transformer. ;)

it's not about the DC has no cycle, but rather a step down voltage may ended up more than 110V due to the difference in frequency, and that in turns result in higher DC output. Just trying to explain in layman perspective, so please feel free to correct me with your expert perspective :D
 

seowbin

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i think that's why there's capacitor inside the circuit... to store charge and maintain a regulated output....

i remember i studied something like that before :s13:
 

thewiseone

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My understanding of a step down 220V -> 110V transformer is that it'll take a 220V AC supply and step down to 110V AC output. There will be no change to the frequency (no frequency conversion takes place). If its a 220V 60Hz supply AC, it'll produce a 110V 60Hz AC. If its a 220V 50Hz supply AC, it'll produce a 110V 50Hz AC. Of course, this is the rms voltage, there'll be voltage fluctuations (above and below this point) which is accomodated in the design of the device/power supply. As for the Roomba power supply that was original designed for 110V 60Hz operation and is now being fed with a 110V 50Hz AC instead, i think thats a moot point since it is basically a switched mode power supply. Freq diff does not pose an issue. I dont see yr point about the 10hz diff affecting the stepped down AC supply voltage.
 
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sherwin

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HSN robot deals are back, quite possibly the full range is available all at once which is rare.
 

shau61

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I tried to use my citibank credit card to order from HSN.COM but failed - "Sorry, we cannot complete this order . We cannot process your order at this time". So :sad:

Those who have successfully got the scooba can give some advise? Thank you
 

mosmos

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I tried to use my citibank credit card to order from HSN.COM but failed - "Sorry, we cannot complete this order . We cannot process your order at this time". So :sad:

Those who have successfully got the scooba can give some advise? Thank you

:o maybe try again with another card.

order from hsn.com really has to depend on luck. :crazy:
 

laucm

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I also encountered the same problem with HSN.
Then I tried to use borderlinx's concierge service (where they will use a US credit card to order for you) - also failed - reason - HSN don't deliver to retailer and they consider borderlinx as a retailer.
Finally, I decided to buy from www.newegg.com, at US$100 more, but with free shipping in US, additional virtual wall, and a charging base.
newegg.com doesn't accept non-US credit card, but the borderlinx;s concierge service works, and my scooba is now on the way to my borderlinx US address.
 

ktee

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Yesterday my roomba began her "circular dance"! :(

Opened up the wheel & saw this:


DSCF1773.jpg


After cleaning, she is working hard again! :D
 

ktee

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Is that before or after cleaning? cos i can't see anything that can disrupt ur roomba :eek:

Before lah. You can see the dirt there and the metal contact not shiny. After cleaning, it is clean clean. I cleaned the contact with contact cleaner and it is shiny. Oh, i cleaned 2 wheels. Might as well. :o
 

laucm

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waliew....USD$100 is so much more expensive.....why never try ebay?

There are reports on fraud in ebay seller selling scooba and irobot don't recommend and provide warranty for robot brought from ebay.
US$100 is more expensive than HSN. But considering it come with additional virtual wall and base charger, and also it is US$100 cheaper than buying from irobot store, i think it's ok.
Especially HSN doesn't accept our money, and also overall, it is still much cheaper than buying in SINGAPORE!!!! :s31:
 

mosmos

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scooba on wootoff soon? :s11:

WOOT, INC. INTERNAL EMAIL
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Attention Woot employees -

We are now entering the final phase of preparations for the Woot-Off planned for midnight tonight. This is when we depart from our usual deal-a-day model and sell one product after another, offering a new deal as soon as the previous one sells out. For some reason, Woot members like mosmos continue to have high expectations for this event. We must make every effort to ensure that they feel disappointed and betrayed.

All workers should be physically and mentally straining to make this Woot-Off a success, like every muscle in a wolf's body strains to capture and devour its prey. We expect total compliance with the following objectives:

* Make sure the stables are thoroughly cleaned and the horses properly groomed and shod. As you know, Commander Rutledge prefers to lead us on horseback during Woot-Offs. Charge!
* Customer Service department: all vacation requests for this week and next are approved. If you have not filed a vacation request, take one anyway.
* The little green pills in the kitchen are there to keep you alert and working. Take as many as you need. Officially, Woot does not believe in the concept of "overdose".
* Take at least one of our servers offline, just for laughs.
* Go to the landfill and dig up some more Sansa media players. If you see any Digipro Graphics Tablets (and you will), grab those, too.
* Place crap bags in company latrines so those orders can be "filled". To this end, the company will provide free lunch today from El Feo, the filthiest burrito joint in Dallas. Do your worst, guys.
* Neutralize all negative thinking among our members. We simply cannot tolerate any more posts like "do not want" or "Woot-Off killer". If electronic means like word filters and IP bans do not work, we must reactivate the rapid-response teams to physically eliminate all threats to our reputation.
* Last time, spot checks revealed that approximately 25% of products shipped are broken, incomplete, or excessively dirty. This is unacceptable. For this Woot-Off, defective shipments must make up at least 40%.
* Remind SmartPost that there's no need to hurry on these orders. Prompt delivery makes our customers spoiled and argumentative. Let them learn humility and gratitude while they wait.


Above all, we must strive to make this Woot-Off even more tedious, disappointing, and lucrative than the last one. The employee who achieves the most toward this end will be rewarded with one brown Zune. Second place: two brown Zunes.

Forward into battle! Remember: to give one's life for Woot is glorious!

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Woot, Inc.

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