Using MOSFETS with TTL levels (5 Volt and 3.3 Volt)

Arduino, ESP8266 & Raspberry Pi stuff

FETVarious Arduino projects that need to switch a high DC load are using MOSFET’s to do this, according to the circuit at the right (R1 is optional and may be necessary to switch off the FET if the pin goes low.

Popular MOSFET’s that are used are the IRF510 and IRF 520

irf510 irf520
IRF510 IRF520

Looking at those graphs one can see that at a gate to source level of 5V (Arduino levels) the IRF510 is only capable of delivering 1 Amp, whereas it is specified for 5,6 Amps continuous current. The 520 is somewhat better: at 5 V it delivers 3 Amps from its max of 9.2. This is because these FET’s are designed to pass the max current at gate voltages of around 10 Volts and that is beyond what most microcontrollers can deliver.

For the IRF522 it is even worse.


Looking at the curve, at a gate to…

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Hawaii: Day 1

“Da Jesus Book” is hilarious. I can’t believe it’s real. I shouldn’t laugh though, Pidgin is supposed to be a “real” language, right?

Thanks for sharing.

Why Evolution Is True

I am on Oahu, the most touristed of the Hawaiian Islands, but there is also great beauty here: beaches, lovely mountains, waterfalls, and, of course, food. It is the island in red on the map below. (The island of “Hawaii” proper, to the extreme right is known as “The Big Island”).

They are all in a series of volcanic islands created as the continental plate moved over a hotspot from southeast to northwest, so that each island was a volcano that became quiescent and then began to erode away. There are underwater islands in the chain to the northwest, and a new island, still underwater, is forming to the southeast of the Big Island.

Here’s a topographic map of Oahu, with an area of 596.7 square miles (1,545.4 km2), and a population of about one million. The island has two mountain chains, volcanic in origin, which lie to…

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New study: Belief in free will doesn’t make you act better

These kinds of studies never seem to persuade the opinions of those espousing “free will”. It appears they are “determined” to stay in their dogmatic mindset.

Why Evolution Is True

Is belief in free will necessary, as many claim, to keep society harmonious? The idea behind that claim is that if you’re a determinist, you’re going to be immoral, criminal, or nihilistic. But is there data supporting that claim?

A couple of previous studies have found a positive association between “prosocial” (i.e., good) behavior and either belief in free will or “priming” with passages promoting free will (vs. passages promoting determinism). But, as I wrote last year, some of these have problems:

One of the famous papers used to justify compatibilism was published by Kathleen Vohs and Jonathan Schooler in Psychological Science, “The value of believing in free will: Encouraging a belief in determinism increases cheating.” But that paper is problematic. Besides its design flaws (i.e., “cheating” was tested shortly after students read passages either promoting or denigrating free will, with no long-term monitoring of behavior)…

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Pic de Finestrelles – Pic Gaspard / Ecrins | 443 km.

𝓐𝔀𝓮𝓼𝓸𝓶𝓮 𝔀𝓸𝓻𝓴. 😎👌🏻 📸


Beyond Horizons

Current World Record of distant landscape photography

bp1410102-mbret.jpgBarre des Écrins (4.102 m) is in the middle left of the image.
Taken from Pic de Finestrelles (2.820 m)  at 440 Km, before sunrise.
In the rest of the pictures, another summits can be seen further away.
By Marc Bret (Beyond Horizons team)
Camera Panasonic Lumix FZ72 @ ISO100 – 1/250
Lens Integrated Zoom @ 1200 mm – f./2.8
Date July 16th 2016
Portraying the silhouette of the Barre des Ecrins from the most distant possible summit of the Pyrenees and get a new World Distance Record has been for us the last most recent target. The result is counted in the image: a view from Pic de Finestrelles (2.820 m.) to the Alps.

Want to try yourself? Don’t forget to check our reccommended cameras!

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Top 10 Funniest Tweet Awards – Mexican Grand Prix 2018

Girl in the Pitlane

I don’t think there was a single F1 fan out there who was not sat on the edge of their seats at the start of today’s race, in anticipation of what might happen at turn one.

After all, with the two Red Bulls at the front, Hamilton with a championship to win in P3 and Vettel with nothing to lose in P4, let’s face it we were expecting total carnage.

In the end, thankfully, everyone emerged in the top six, at least, emerged unscathed after turn one with Hamilton getting a fantastic start and passing Ricciardo to grab P2.

The same unfortunately can’t be said for Alonso, who got entangled with Ocon’s front wing and retired not much further along the track than he managed in Austin last week. On the plus side for McLaren, Stoffel Vandoorne ended the race in 9th position – who saw that coming, I certainly…

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The Trinity IS NOT Found in the Old Testament

D. M. Spence

After the ‘success‘ of her last post, ‘proving’ that Jesus is the angel of the Lord by providing precisely 0 quotes to support her case, SJ Thomason tries her hand at exegesis again by trying to claim that the Christian doctrine of the Trinity is found in the Jewish Scriptures. So let’s see what she has to say to support the view that the Trinity is found in the Bible:

“The Trinity of God the Father, the Son, and the Holy Spirit is not explicitly revealed as a “Trinity” in the Bible…”

Ah… That’s not a great start! But at least she is being honest and something I actually agree with: the Trinity is not explicitly mentioned in the Bible. It was not until the end of the 2nd centurythat the word Trinity was even uttered [1] and at this time, the majority of…

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Sarah Jeong redux

Why Evolution Is True

I won’t reprise the posts I’ve written about Sarah Jeong, who was hired by the New York Times as its tech editor despite a long history of racism, misandry, and other bizarre behavior on social media (go here for a list). Despite a different hire being fired immediately by the Times for similar transgressions, Jeong was apparently considered a member of an oppressed minority—despite having gone to Berkeley and Harvard Law School—because she was of Korean descent.

The hypocrisy of this is exacerbated when you realize that not only did her paper defend her racist tweets as the result of other people’s attacks on her for being an Asian woman (that defense is not credible), but also that other venues, like Fortune, The New Yorker, and Vox, also excused her racism and bigotry. (For a critique you’ll have to read Andrew Sullivan in New York Magazine.)…

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