Member Since: December 1, 2006

Country: United States

  • The cloverleaf antenna has virtually no gain (almost isotropic) and is circularly polarzied -- which is ideal for this application - however, you'd likely have gotten much better results if you'd used a helical on your groundstation since the yagi is linearly polarized so you'll not realize its full stated gain when receiving a CP signal.

    Helicals are a piece of cake to make -- check out the guys at FPVlabs.com, they have plenty of discussion on such things over there.

  • I tried a SpeakJet for a project but it's really bad. The old speech synth chips of the 1980s were much better (from memory).

    In the end I had to go for pre-recorded words/phrases and an MP3 player in order that people could actually recognize what was being said with sufficient accuracy because the SpeakJet is just so very, very bad.

  • Damn... bought some of these and didn't notice (until they arrived) that they were not the 28-pin devices in the datasheet but actually a 24-pin package that isn't mentioned in the datasheet. A few hours of Eagle time down the gurgler :-( I must pay more attention in future.

  • Woohoo... I bought this from SparkFun and then picked up a 230->110V 300W transformer locally for $50. Ended up saving a total of almost $100 over buying the 230V version locally. Thanks Sparkfun!

  • Hakko seem intent on ripping off those of use who use 220-240VAC because there's at least a 70% premium being charged for non-110V versions of this iron.
    I suspect they won't sell the 220V unit to Sparkfun because it would mean that their European and Asian distributors would have to reduce their margins (to a reasonable amount) in order to compete.

  • Yes, the stuff in that flat round tin is a form of flux -- but it's not a very good flux. Like SFE, I ordered a range of "Soldering Paste" options from China and ended up with just one (quite good) 50g tub of true solder paste. The real stuff was in a tiny cylindrical container. All the other stuff (in those flatter tins) was a form of flux. Hopefully SFE found the right stuff -- it works very well and is very economically priced.

  • Coincidentally it's the end of daylight savings here in NZ this weekend so it all works out really -- but now I have to wait an extra 25 hours to get my new products fix :-( Oh, the humanity!

  • For those who are interested, this is a constantly agile DSSS 2.4GHz system which "hops" across the entire band and as such, it's pretty resilient to noise on the 2.4GHz band. It is much improved over the original (V1) system which was a single frequency non-agile DSSS system. The only problem will probably be getting spare receivers -- they're a bit like hen's teeth right now. I've reviewed a range of the HK/Turnigy RC systems at RCModelReviews.com for those wanting more info.

  • The problem is that human beings really aren't capable of producing much power.
    Even a relatively fit person would be very hard-pushed to produce more than 250-300W over a 1 hour period which, at most electricity rates, is just a few cents.
    Over the period of a year one might just about generate enough electricity to pay for a beer :-)

  • How did Sparkfun grow so big so quickly?

No public wish lists :(