Run time for leds

Started by AK in sci.electronics.basics23 hours ago 3 replies

I have (8) 5 watt leds that are run from a 12VDC source. (3 18650 batteries at 3000 Ma hrs each. I want to know the approx run...

I have (8) 5 watt leds that are run from a 12VDC source. (3 18650 batteries at 3000 Ma hrs each. I want to know the approx run time. Thanks.


Fundamentals of Web Development 1st Edition Randy Connolly (Test Bank)

Started by Anonymous in sci.electronics.basics3 days ago

solutions book team solutionsmanual2019@gmail.com s o l u t i o n s m a n u a l 2 0 1 9 @ g m a i l . c o...

solutions book team solutionsmanual2019@gmail.com s o l u t i o n s m a n u a l 2 0 1 9 @ g m a i l . c o m solutionsmanual2019(at)gmail(dot)com We just reply by email solutionsmanual2019(at)gmail(dot)com (We do not deal with direct reply via groups google) Please Do NOT POST/REPLY HERE, just email us at solutionsmanual2019(at)gmail(dot)com We're a team for prov


Fundamentals of Pharmacology 7th Australian Edition by Shane Bullock (Test Bank)

Started by Anonymous in sci.electronics.basics3 days ago

solutions book team solutionsmanual2019@gmail.com s o l u t i o n s m a n u a l 2 0 1 9 @ g m a i l . c o...

solutions book team solutionsmanual2019@gmail.com s o l u t i o n s m a n u a l 2 0 1 9 @ g m a i l . c o m solutionsmanual2019(at)gmail(dot)com We just reply by email solutionsmanual2019(at)gmail(dot)com (We do not deal with direct reply via groups google) Please Do NOT POST/REPLY HERE, just email us at solutionsmanual2019(at)gmail(dot)com We're a team for prov


Spurious triggering of 4013 flip-flop

Started by Terry Pinnell in sci.electronics.basics3 days ago 55 replies

One of my garden lamp circuits is shown here: https://www.dropbox.com/s/10cc6lwfrsqjp68/DiningLamp-Post.jpg?raw=1 But the CMOS 4013...

One of my garden lamp circuits is shown here: https://www.dropbox.com/s/10cc6lwfrsqjp68/DiningLamp-Post.jpg?raw=1 But the CMOS 4013 flip-flop circuit suffers from occasional spurious triggering. Somehow it frequently gets activated overnight. Frustratingly I?m unable to pin it down. But I suspect it may be due to the very long wire (60 ft or so) carrying the high-going brief input signal...


How do you recycle solar panels?

Started by Mr. Man-wai Chang in sci.electronics.basics5 days ago 12 replies

How do you recycle solar panels? Without any pollution? -- @~@ Remain silent! Drink, Blink, Stretch! Live long and prosper!! / v \ ...

How do you recycle solar panels? Without any pollution? -- @~@ Remain silent! Drink, Blink, Stretch! Live long and prosper!! / v \ Simplicity is Beauty! /( _ )\ May the Force and farces be with you! ^ ^ (x86_64 Ubuntu 9.10) Linux 2.6.39.3 ¤£­É¶U! ¤£¶BÄF! ¤£½ä¿ú! ¤£´©¥æ! ¤£¥´¥æ! ¤£¥´§T! ¤£¦Û±þ! ¤£¨D¯«! ½Ð¦Ò¼{ºî´© (CSSA):...


"Show Me the _Times_ Article That's A Square Wave. I Dare You. I Double Dare Ya . . .

Started by Bret Cahill in sci.electronics.basics5 days ago 3 replies

. . . . all our articles are sine waves." -- Shultzberger X (knowing full well the macro effect of partial...

. . . . all our articles are sine waves." -- Shultzberger X (knowing full well the macro effect of partial truths) https://www.youtube.com/watch?v=k8FXF1KjzY0


cmos IC question

Started by default in sci.electronics.basics1 week ago 18 replies

I'm using some cmos IC gates in a project. All seem to have an internal protection network to insure that the inputs can't exceed supply or go...

I'm using some cmos IC gates in a project. All seem to have an internal protection network to insure that the inputs can't exceed supply or go more negative than ground with internal diodes. My question has to do with those protection diode ratings. How much current can they clamp to prevent exceeding the input voltage rating? For instance, I'm running one part of the circuit at 8 volts...


Switch mystery

Started by AK in sci.electronics.basics2 weeks ago 6 replies

As you can see in the picture, the switch is set to the off position. When I test the continuity, there is no beep. However, when I test the...

As you can see in the picture, the switch is set to the off position. When I test the continuity, there is no beep. However, when I test the outgoing voltage, it is 18 Volts D.c. What gives? "https://www.dropbox.com/s/sngn1wyod4ni19i/Switch.jpg?dl=0"


NiMH batteries

Started by AK in sci.electronics.basics3 weeks ago 2 replies

I bought some EBL aaa nimh batteries. Voltage is 1.3 v. Does that mean they are already fully charged? Andy

I bought some EBL aaa nimh batteries. Voltage is 1.3 v. Does that mean they are already fully charged? Andy


Retro Button Would Further Automation On the Boeing Max & Everything Else That Seems Sophisticated Beyond the Intelligence of Designers

Started by Bret Cahill in sci.electronics.basics3 weeks ago 38 replies

Put a retro or "my kingdom for a horse" switch on anything that seems unnecessarily over automated or when the additional sophistication is of a...

Put a retro or "my kingdom for a horse" switch on anything that seems unnecessarily over automated or when the additional sophistication is of a minor advantage. If anything doesn't seem perfect, tap the retro switch and you are back to flying by the seat of your pants or at least something that is less complicated / more proven technology. It may seem counter intuitive but this would actual...


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