current snooper

Started by John Larkin in sci.electronics.design10 hours ago 17 replies

https://www.dropbox.com/s/84e2pui7g1vq9l4/Current_Snooper.jpg?raw=1 This lowpass-filters high frequency noise out of the power...

https://www.dropbox.com/s/84e2pui7g1vq9l4/Current_Snooper.jpg?raw=1 This lowpass-filters high frequency noise out of the power supply current, so I can easily see the average current change vs time. -- John Larkin Highland Technology, Inc lunatic fringe electronics


World-first trial for universal flu vaccine

Started by Anonymous in sci.electronics.design10 hours ago 14 replies

This one doesn't work by producing antibodies, it uses a virus vector to train T-cells to attack cells infected by the virus and thereby stem the...

This one doesn't work by producing antibodies, it uses a virus vector to train T-cells to attack cells infected by the virus and thereby stem the proliferation of the infection. An Oxford spin-off Vaccitech http://www.ox.ac.uk/news/2017-10-03-world-first-trial-universal-flu-vaccine If successful, it will still be the better part of a decade before the new vaccine becomes available.


NPN operated in reverse question

Started by John S in sci.electronics.design11 hours ago 2 replies

I know the gain will be low, but that's okay. I only need signal inversion. I also need the e-b breakdown to protect the gate of a FET from a...

I know the gain will be low, but that's okay. I only need signal inversion. I also need the e-b breakdown to protect the gate of a FET from a 25v source via a 100k resistor. The base will be connected to a current sampling resistor in the source of the NMOS. The collector will be grounded. The emitter will be connected to the gate. Both will be be connected to the 25V supply via the 1...


Alternator problem

Started by linnix in sci.electronics.design12 hours ago 139 replies

I know many engineers here work on cars, so ... I am debugging my wife's Lexus ES300. The problem is that the OEM alternators (original and...

I know many engineers here work on cars, so ... I am debugging my wife's Lexus ES300. The problem is that the OEM alternators (original and replacements) are not charging at idle. At idle speed, the alternator put out 8V to 10V, which is insufficient to charge the battery. At high speed, it does put out 14V. People suggested speeding it up by changing the front pulley (65mm) to a small...


RADAR project

Started by Neon John in sci.electronics.design14 hours ago 6 replies

Now that my workload has eased up, I want to work again on a hobby time-of-flight speed radar as opposed to the standard dopper radar. ...

Now that my workload has eased up, I want to work again on a hobby time-of-flight speed radar as opposed to the standard dopper radar. A couple of very brief pulses won't trigger radar detectors so I can do an accurate speed study on our road. And it will work measuring the speed of a top-fuel dragster, punching through all the broadband EMI generated by the powerful ignitions and EMI ass...


Very OT: PCV valves in cars, without springs?

Started by Joerg in sci.electronics.design14 hours ago 21 replies

Couldn't find a decent car group but I know there are some folks here who know automotive well. In preparation for a smog check (was marginal...

Couldn't find a decent car group but I know there are some folks here who know automotive well. In preparation for a smog check (was marginal for HC at 15mph last time) I also swapped out the PCV valve for crankcase venting. 1996 Toyota Corolla. The old one rattled when shaken. I thought the spring had broken. The new one is a MicroGuard PCV385 and ... rattles just like the old one. N...


Is fiberglass filament tape going the way of the dodo bird.

Started by amdx in sci.electronics.design14 hours ago 3 replies

I have searched Lowes and Home Depot for a decent roll of 1" Fiberglass filament reinforced packing tape. Neither have it. I found a small roll...

I have searched Lowes and Home Depot for a decent roll of 1" Fiberglass filament reinforced packing tape. Neither have it. I found a small roll at Walmart, smaller and wider than what I want. I have found some online, but there are different qualities, the cheap stuff gets poor reviews for strength, the glue, and ability to get it off the roll. I bit the bullet and bought a Roll of 3...


Secret Sauce Updated Today... Added 9 Additional BandGap's

Started by Jim Thompson in sci.electronics.design15 hours ago 2 replies

Secret Sauce Updated Today... Added 9 Additional BandGap's ...Jim Thompson -- | James E.Thompson ...

Secret Sauce Updated Today... Added 9 Additional BandGap's ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | STV, Queen Creek, AZ 85142 Skype: skypeanalog | | | ...


...single most disappointing day for the national media since November 2016...

Started by Jim Thompson in sci.electronics.design15 hours ago 20 replies

...single most disappointing day for the national media since November 2016... Scoring "30 out of 30 on the Montreal Cognitive...

...single most disappointing day for the national media since November 2016... Scoring "30 out of 30 on the Montreal Cognitive Assessment" Ought to put bitrex and slowman into heartburn hell > :-} ...Jim Thompson -- | James E.Tho


Tuxedo Park

Started by John Larkin in sci.electronics.design1 day ago 23 replies

On PBS tonight. Should be interesting. -- John Larkin Highland Technology, Inc lunatic fringe electronics

On PBS tonight. Should be interesting. -- John Larkin Highland Technology, Inc lunatic fringe electronics


Ask a Question to the Electronics-Related community

To significantly increase your chances of receiving answers, please make sure to:

  1. Use a meaningful title
  2. Express your question clearly and well
  3. Do not use this forum to promote your product, service or business
  4. Write in clear, grammatical, correctly-spelled language
  5. Do not post content that violates a copyright