Laptop battery charging?

Started by Dean Hoffman in sci.electronics.design2 weeks ago 2 replies

I recently bought a new MacBook Air. There are all sorts of tips about extending the duration of a single charge. Does it...

I recently bought a new MacBook Air. There are all sorts of tips about extending the duration of a single charge. Does it matter when I charge it if I want to get the battery's life to be the longest? Should I charge it when the battery is at 50%, 25%, or maybe let it run down to shutdown?


Pence should be protected to avoid constitutional crisis

Started by Anonymous in sci.electronics.design2 weeks ago 17 replies

"And yet, the president and his advisors have learned absolutely nothing. When the president is known to be at risk, America must protect the...

"And yet, the president and his advisors have learned absolutely nothing. When the president is known to be at risk, America must protect the vice-president's health and safety at all costs. To do otherwise risks an unprecedented disaster. Pence should be in a bunker at an undisclosed location. Instead, he’s scheduled to hold a live, no doubt crowded and maskless, rally in A


Composite video amp

Started by bitrex in sci.electronics.design2 weeks ago 7 replies

Looking for a recommendation for a voltage-feedback op amp suitable for buffering/amplifying composite video signals, not a portable application...

Looking for a recommendation for a voltage-feedback op amp suitable for buffering/amplifying composite video signals, not a portable application so +5/-5 supply is OK. An amp that can drive 75 ohms directly is nice but not required I can always add a buffer. Something around $1.50 in quantity? There's a lot to choose from and not everything lists differential gain and differential pha...


Students will spread a stronger Corona virus (Stronger Immune System in Students)

Started by skybuck2000 in sci.electronics.design2 weeks ago 69 replies

Skybuck's Thoughts on how the Corona Virus situation will develop in The Netherlands where children and students are allowed to go to...

Skybuck's Thoughts on how the Corona Virus situation will develop in The Netherlands where children and students are allowed to go to school/college: Students have a stronger immune system. This will allow the spreading of a stronger version of the Corona Virus. When this stronger version of the Corona Virus is transmitted to older persons, more deaths will occur among older persons with wea...


OT: New Judge

Started by Cursitor Doom in sci.electronics.design2 weeks ago 146 replies

If the Cultural Marxist-Anarchist-BLM-ANTIFA brigade attempt to interfere with Trump's pick of the new judge, THERE WILL BE TROUBLE. Just...

If the Cultural Marxist-Anarchist-BLM-ANTIFA brigade attempt to interfere with Trump's pick of the new judge, THERE WILL BE TROUBLE. Just sayin'.


OT: Trump's Other Infection

Started by Ricketty C in sci.electronics.design2 weeks ago 63 replies

I'm surprised that there is so little discussion here about the biggest event since the Presidential race started. Trump has fallen ill with the...

I'm surprised that there is so little discussion here about the biggest event since the Presidential race started. Trump has fallen ill with the very disease he so readily dismissed. Now he has been packed off to hospital and the news is very sparse. With other members of government also being ill (among them 3 senators, 2 from the judiciary committee) the infection would seem to be impacti...


dangerous profession

Started by Anonymous in sci.electronics.design2 weeks ago 43 replies

In the last week, I've been burned 6 times, shocked once, punctured (with blood) twice, and had to eat a single burger for three lunches in a...

In the last week, I've been burned 6 times, shocked once, punctured (with blood) twice, and had to eat a single burger for three lunches in a row. And we are out of ice cream sandwiches. -- John Larkin Highland Technology, Inc Science teaches us to doubt. Claude Bernard


FPGA sensitivities

Started by John Larkin in sci.electronics.design2 weeks ago 22 replies

I have a time-critical thing where the signal passes through an XC7A15 FPGA and does a fair lot of stuff inside. I measured delay vs...

I have a time-critical thing where the signal passes through an XC7A15 FPGA and does a fair lot of stuff inside. I measured delay vs some voltages: 1.8 aux no measurable DC effect 3.3 vccio no measurable DC effect 2.5 vccio ditto (key io's are LVDS in this bank) +1 core -10 ps per millivolt! If I vary the trigger frequency, I can see the delay heterodyning against the 1....


Commands to control car

Started by Zeeshan Akram in sci.electronics.design2 weeks ago 3 replies

Hi, Is there any way i can send commands to OBD2 to control stuff like door locks, wipers, headlights etc etc. which commands are suitable for...

Hi, Is there any way i can send commands to OBD2 to control stuff like door locks, wipers, headlights etc etc. which commands are suitable for these? i am currently testing these on Honda Civic 2011


mitigation vs suppression strategy Covid19

Started by legg in sci.electronics.design2 weeks ago 256 replies

https://medium.com/@tomaspueyo/coronavirus-the-hammer-and-the-dance-be9337092b56 RL

https://medium.com/@tomaspueyo/coronavirus-the-hammer-and-the-dance-be9337092b56 RL


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