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#11
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Larry wrote:
That t-shirt is STILL there, just to make sure....(c; Time you got over it. |
#12
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Justin C wrote:
In article , cavelamb wrote: Larry wrote: Gordon wrote in m: What does a man need - really need? A few pounds of food each day, heat and shelter, six feet to lie down in - and some form of working activity that will yield a sense of accomplishment. That's all - in the material sense, and we know it. Catalina 22? something with a real keel! If it was just me (and not my wife too), I'd have a Folkboat - and I wouldn't be here! Justin. I've spent a fair amount of time in a wooden Folkboat. It was one of the least comfortable I've sailed. I didn't mind too much, but the owner's wife got seasick thinking about it (which is why I got so much time in it). I'll admit they have a good passage record for a 26 footer, but its not a boat I could "take off" in. But, give me a Nonsuch 26 and no ties ... |
#13
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Justin C wrote:
In article , Larry wrote: Justin C wrote in : In article , cavelamb wrote: Larry wrote: Gordon wrote in m: What does a man need - really need? A few pounds of food each day, heat and shelter, six feet to lie down in - and some form of working activity that will yield a sense of accomplishment. That's all - in the material sense, and we know it. Catalina 22? something with a real keel! If it was just me (and not my wife too), I'd have a Folkboat - and I wouldn't be here! Justin. Dump her! The docks are full of cooperative females to breed...(c;] No! You got (possibly) the wrong end of the stick. The wife wants to come along too, it's just that a Folkboat is too small for two! .... hmmm, or are you suggesting I go with out her and find a woman in any/every port I visit? Isn't that how you catch syphilis? Justin. That's what they told us in the Navy but no one on my Destroyer ever got it. Clap and crabs, yes! They also said no tattoos for the same reason. g |
#14
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Justin C wrote in
: No! You got (possibly) the wrong end of the stick. The wife wants to come along too, it's just that a Folkboat is too small for two! Go to Youtube and do a search for "Keep Turning Left".....your kind of boat....(c; |
#15
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![]() "Larry" wrote in message ... Vic Smith wrote in : Dump her! The docks are full of cooperative females to breed...(c;] Easy to see why you're not married. --Vic Once for 17 years was more than plenty....... call me an "escapee"..... The day she left me in 1992, after living with a neat freak for 17+ years, i threw an old T-shirt in the middle of the bedroom floor as an exwife detector. I knew that if she ever came back, that t-shirt would be "put up"...just like my iced tea glass the instant I sat it on a surface. That t-shirt is STILL there, just to make sure....(c; Were you still bringing home truckloads of interesting antique electronic stuff for all those 17 years? |
#16
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"Edgar" wrote in
: Were you still bringing home truckloads of interesting antique electronic stuff for all those 17 years? Not allowed. I didn't fill the house until after she left...(c;] |
#17
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posted to rec.boats.cruising
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On Mon, 30 Mar 2009 16:43:52 +0000, Larry wrote:
"Edgar" wrote in : Were you still bringing home truckloads of interesting antique electronic stuff for all those 17 years? Not allowed. I didn't fill the house until after she left...(c;] Off Topic but someone admonished me for posting a "Ping Larry" so I'll borrow this thread for a moment. Larry, Any thoughts on using a 555 as a pulse width modulator to drive a LED from a 12 volt source? I am presently using a 7806 and a resister but that ends up drawing about as many amps as an incandescent light. Cheers, Bruce (bruceinbangkokatgmaildotcom) |
#18
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posted to rec.boats.cruising
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Bruce In Bangkok wrote in
: Any thoughts on using a 555 as a pulse width modulator to drive a LED from a 12 volt source? I am presently using a 7806 and a resister but that ends up drawing about as many amps as an incandescent light. That's exactly how an LED taillight on a vehicle or trailer works. When you turn on the taillight circuit wire, the lights are pulsed with a square wave, giving you the illusion of "dim" from your eye's optical persistence, how you see this message on your screen. When the brake wire is fed, the LED comes on full DC brightness. There's only one set of LEDs in them. The 555 should drive a powertab transistor so you can run as many LEDs off it as you wish, limited only by the powertab's peak current rating. You won't need much of a heat sink on this transistor because you'll make SURE that when it is on it is fully saturated by selecting its series base resistor. A normally-off power MOSFET used in small inverters eliminates any load at all on the 555 and is more efficient as it saturates in a snap. There are lots of models. I'm currently working on a switching audio power amp with such MOSFET output transistors. The resting feed with no audio input is a square wave fed to each gate one N-channel one P-channel. The average DC output fed to a series choke with capacitance on its output towards the speaker load is zero...50% on, 50% off. The frequency is around 100 Khz and the L- filter blocks this frequency because its rolloff is around 25 Khz above the audio we want out. The speakers feel nothing. When audio is applied to the pulse width modulator, it varies the width up and down around 50% duty cycle and the output fed through the averaging circuit L-filter on the output is a VERY low impedance, up to 90V peak-to-peak audio. The transistors don't even get warm when the audio is painfully loud! These MOSFET switchers are rated for continuous saturated current of THIRTY AMPS! Their switched off Source to Drain voltage is rated at 60 or 80 VDC, as I remember. Make sure you switch the 555 at a very high rate, ABOVE the audio range so if anything is near the wires that's magnetic, it won't make it "sing" when dimmed. LEDs can switch on and off at fantastic rates and STROBE LIKE HELL so you want to make SURE you can't detect their strobing or it will drive you crazy to sit in their light....like being in a store or gym lit by stupid Mercury vapor or Metal Halide gas lamps on 60 Hz. The frequency isn't critical as it's no where near how fast the 555 can switch it for you. Don't go crazy, however, as you'll end up with inductive spikes from the wiring. Next time you're on a street at night and a car with LED taillights is going away from you so you can see it without its brake lights on, move your eyes rapidly back and forth and you can see their flashing on and off at a rapid rate in taillight mode.... Series analog regulator, thankfully for the house batteries, are HISTORY! I bet somebody already makes an LED dimmer that works this way.... Here's a custom IC that's cheap and the application note: http://www.scribd.com/doc/11968289/M...D-Dimmer-with- CapSense-Control Another source Google found: http://www.docstoc.com/docs/4107556/...D-Dimmer-with- CapSense-Control Of course, Someone in Vienna is leddimmer.com: http://leddimmer.com/dateien/Deutsch/struktur/home.html Ah, here's a nice looking one for $15 from ebay in Singapo http://cgi.ebay.com.sg/DC-12V-8A-LED...le-brightness- controller_W0QQcmdZViewItemQQitemZ360136683352 Easy to mount, will look nice if the dimmer is behind a panel with only its knob protruding through. Price is right.....(c;] I'm sure Asia has millions of other examples and hits closer to home. |
#19
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posted to rec.boats.cruising
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Bruce In Bangkok wrote in
: Any thoughts on using a 555 as a pulse width modulator to drive a LED from a 12 volt source? I am presently using a 7806 and a resister but that ends up drawing about as many amps as an incandescent light. That last one from Singapore is rated at 8A....It oughta dim the whole LED suite in the boat! How cool....as she gets "in the mood"....you lay your hand back behind the settee and slowly dim all the lights almost imperceptably to match her increasing excitement. Yeah....I can see a great use for such a dimmer....(c;] |
#20
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posted to rec.boats.cruising
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Larry wrote:
Bruce In Bangkok wrote in : Any thoughts on using a 555 as a pulse width modulator to drive a LED from a 12 volt source? I am presently using a 7806 and a resister but that ends up drawing about as many amps as an incandescent light. That last one from Singapore is rated at 8A....It oughta dim the whole LED suite in the boat! How cool....as she gets "in the mood"....you lay your hand back behind the settee and slowly dim all the lights almost imperceptably to match her increasing excitement. Yeah....I can see a great use for such a dimmer....(c;] Hmmm. Need to dim the lights? Got sumting you don't want her to see? G |
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