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Comment: Re:Boo (Score 1) 163

by cpotoso (#47587381) Attached to: Fooling a Mercedes Into Autonomous Driving With a Soda Can
Let's see... a tire with a radius of ~0.3 m, in a car traveling at 100 mph ( 45 m/s) experiences a maximum centripetal acceleration of ~6700 m/s^2). A 1 in^2*0.5 in piece of rubber (assuming density to be ~ 1 g/cm^3) experiences a "centrifugal foce" of ONLY ~4.7 pounds! That is only 4.7 psi. So over-inflating by 20 psi MAY BE A PROBLEM.

Comment: xprotolab or teensy 3.1 (Score 1) 172

by cpotoso (#47226479) Attached to: Ask Slashdot: PC-Based Oscilloscopes On a Microbudget?
xprotolab or teensy 3.1

Check out xprotolab ( from Gabotronics. Not too fast or too easy to use but it is very capable and Gabo provides very good support. It is self-contained (small oled screen) but can also send info to PC over USB.

Also, the "arduino" teensy 3.1 could be used to make a USB-based scope for ca. $20 (plus some additional parts) and can have a lot of other cool uses too. Check it out: and

Comment: Re:Does it really cost $100k? (Score 2) 461

by cpotoso (#46459927) Attached to: The $100,000 Device That Could Have Solved Missing Plane Mystery
Your posting is close to non-sense. Who is saying that every Cessna 172 should have this device? We are talking about AIRLINERS, and in particular those that go transoceanic routes where radar tracking is not possible. On a 767-sized plane (and above) the $100k cost IS negligible when compared to other operational costs (fuel, crew, maintenance, insurance).

Comment: Why aren't big planes PERMANENTLY monitored? (Score 1) 142

I am not talking RADAR, but rather satellite-linked transponders relaying (at least) once per minute the plane "vitals" (coordinates, velocity, altitude, attitude, cabin pressure and temperature, fuel levels, any error codes or warnings). I mean, this may not be cheap, but it is meaningless cost-wise compared to the operational cost of a plane.

Comment: Re:Even worse... (Score 1, Redundant) 408

by cpotoso (#45595169) Attached to: Death to the Trapezoid... Next USB Connector Will Be Reversible
What a S T U P ID reply. What is the orientation of the connectors in the back of a computer? In a random USB hub? Why the need to look for the logo when the shape of the connector could convey the correct orientation? (or even better, be orientation neutral). Do they pay you to use your brain in your work, or just brute force?

Get hold of portable property. -- Charles Dickens, "Great Expectations"