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faster Firefox

Started by John Larkin in sci.electronics.design2 hours ago 3 replies

Do this in about:config privacy.trackingprotection.enabled to ?true? It reduces the number of 3rd party downloads on a web page. Also,...

Do this in about:config privacy.trackingprotection.enabled to ?true? It reduces the number of 3rd party downloads on a web page. Also, make Flash loads optional. -- John Larkin Highland Technology, Inc picosecond timing laser drivers and controllers jlarkin att highlandtechnology dott com http://www.highlandtechnology.com


Diode and capacitor on mains input

Started by Anonymous in sci.electronics.design2 hours ago 5 replies

I'm fixing a B & O amplifier, a pleasure due to the clear schematics supplied with it but do not understand one little area. In series with the...

I'm fixing a B & O amplifier, a pleasure due to the clear schematics supplied with it but do not understand one little area. In series with the mains input there is an electrolytic and a pair of back to back diodes all in parallel. What is this for ? Excuse the poor ASCII art. ---| |--- | | ---||--- Jon


Serial To USB Adapters

Started by nuny...@bid.nes in sci.electronics.design2 hours ago 14 replies

I'd like to take this opportunity to display my ignorance. I know that serial to USB adapters exist, but there are some that require...

I'd like to take this opportunity to display my ignorance. I know that serial to USB adapters exist, but there are some that require drivers and some that don't. I also know that many, if not most, are intended to permit the connection of "legacy" serial devices to newer computers that have USB but not serial ports. I have the opposite problem. I have an ancient Toshiba L


115 V car outlets

Started by Jon Elson in sci.electronics.design4 hours ago 79 replies

We rented a Jeep Cherokee to drive some gear up to Chicago for an experiment. It had a 115 V outlet convenient to the back seat. I plugged...

We rented a Jeep Cherokee to drive some gear up to Chicago for an experiment. It had a 115 V outlet convenient to the back seat. I plugged my laptop mains adapter in, and found that the computer battery was being used, at least partly. I looked closer, and the yellow LED on the outlet and the green LED on the laptop supply were blinking every 5-7 seconds. So, apparently, the car's 11...


fabulous book

Started by John Larkin in sci.electronics.design5 hours ago 4 replies

http://tinyurl.com/nfm2lya This is by the guy who wrote "Chaos" and "Genius" A good companion book...

http://tinyurl.com/nfm2lya This is by the guy who wrote "Chaos" and "Genius" A good companion book is http://tinyurl.com/q54em3k which has a few of the same characters, Claude Shannon in particular. -- John Larkin Highland Technology, Inc picosecond timing laser drivers and controllers jlarkin att highlandtechnology dott com http://www.highlandtechnology.c...


"Small" (physical size) thumb drives

Started by Don Y in sci.electronics.design6 hours ago 45 replies

Hi, Recommendations for physically small, modest size (~16G), "fast" thumb drives? I've recently been using more "traditional" sized...

Hi, Recommendations for physically small, modest size (~16G), "fast" thumb drives? I've recently been using more "traditional" sized SanDisk drives and have been disappointed with their performance (speed) and reliability (I've had a couple "suddenly" decide to become read-only devices -- despite the absence of a write-protect switch!) Use is primarily for multiple reads but some rout...


Op amp recommendation

Started by bitrex in sci.electronics.design8 hours ago 15 replies

Can anyone recommend a low quiescent power, low cost, CMOS op amp suitable for use from a single supply, that can really pump out current...

Can anyone recommend a low quiescent power, low cost, CMOS op amp suitable for use from a single supply, that can really pump out current when required (50 - 100 mA)? GBW and slew rate requirements are modest and most anything above 1 MHz and 1 volt/us would do. -- ----Android NewsGroup Reader---- http://usenet.sinaapp.com/


What is the attenuation of a 2.5GHz signal in a 50 ohm coaxial stripline structure in 1/2 oz FR4 PCB?

Started by RobertMacy in sci.electronics.design10 hours ago 10 replies

Envision 1/2 oz copper, FR4 PCB, standard 10 layer stackup using five 5 mil BLANKS. STACK=UP: trace 1 GND trace 2 trace...

Envision 1/2 oz copper, FR4 PCB, standard 10 layer stackup using five 5 mil BLANKS. STACK=UP: trace 1 GND trace 2 trace 3 GND Vcc trace 4 trace 5 GND trace 6 Make the the coaxial stripline structure to have SIGNAL about 7 mils wide and exist on trace 3, with 'middle' GND the bottom of the coax, skip trace 2, and have 'component' GND the top of the coaxial str...


Long ingrained neural pathways

Started by amdx in sci.electronics.design12 hours ago 5 replies

I picked this up on another newsgroup. It's about riding a bike with reverse geared steering. I know you've seen one before, but there is...

I picked this up on another newsgroup. It's about riding a bike with reverse geared steering. I know you've seen one before, but there is some analysis about how long it took this engineer to learn to ride it and then how long for his 5 year old son to learn. And then what happens when he tries to go back to a normal bike. http://viewpure.com/MFzDaBzBlL0?ref=bkmk ...


MPPT using an inverting boost converter

Started by Sonnich Jensen in sci.electronics.design13 hours ago 22 replies

Hi all I am thinking about this options for...

Hi all I am thinking about this options for MPPT http://upload.wikimedia.org/wikipedia/commons/thumb/8/82/Buckboost_operating.svg/200px-Buckboost _operating.svg.png I have different options for my input, and this can convert up and down, so it fits me well. Also, a panel can be used over a larger scale. Does anyone have any experience with this? WBR Sonnich


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