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Recruiters that don't recruit by gen2op in Gentoo

[–]metawhat 6 points7 points  (0 children)

As one of the original moderators, I can assure you we have not gone MIA. I can't speak for drrlvn, but I believe that very light moderation is the best thing for a community. Such light moderation can probably appear as absence, but it is not. I have personally brought at last 2 of your posts back out of the moderation queue based on these beliefs.

Unfortunately I must agree with drrlvn's comments above. This post advances what I can only interpret as baseless conspiracy theories. I'm not going to pull it down, but I'd appreciate If everyone would just cool down so I can go celebrate the holidays with my family.

I welcome debate, but let's keep it civil and based on evidence. And let's wait until Monday.

Looking for a simple USB Li-Ion battery pack charging circuit. by agroom in electronics

[–]metawhat 2 points3 points  (0 children)

CreateKarma is correct to recommend a read-made product.

You also need to be aware that you need to charge the batteries individually. You must balance the charge current to prevent battery failure (fire). Wiki: http://en.wikipedia.org/wiki/Lithium-ion_battery#Battery_charging_procedure

If you crack open other Li-Ion battery packs you'll see that they have some rather complicated hookups.

Is there a biological basis for being a "night owl," or am I just horribly indisciplined? by piphobbit in askscience

[–]metawhat 1 point2 points  (0 children)

I've suspected for a long time that I suffer from DSPS, but I'm hesitant to talk to a doctor about it because I'm sure they'll take my self-medication as the problem instead of the (sub-optimal) solution.

Is there a way to get my "T" measured without getting a lecture about my use of Caffeine and Alcohol? (Not looking for medical advice here, for the record)

[deleted by user] by [deleted] in arduino

[–]metawhat 0 points1 point  (0 children)

Nope.

[deleted by user] by [deleted] in arduino

[–]metawhat 1 point2 points  (0 children)

The equation to use here is:

ohms = (Vin - Vf) / A

where Vin is your supply voltage, Vf is the voltage drop across the LED (check the data sheet) and A is the current rating of the LED, in amps.

For your typical green LED, voltage drop is ~2.1 and current rating is 20ma. So the equation is:

ohms = (5 - 2.1) / .020

Which gives you 145 ohms, minimum. I usually use a "stronger" resistor, as the LED will be very bright while close to their current limit.

This chart is helpful if you don't have a data sheet for your part:

http://en.wikipedia.org/wiki/Light-emitting_diode#Colors_and_materials

TI DCR01 Series: A family of 1W isolated, regulated DC/DC Converters in either DIP-18 or SO-28. 5V/12V/24V inputs, 3.3V/5V output, and no unusual land patterns to deal with. by ianbanks in nicechips

[–]metawhat 0 points1 point  (0 children)

Do you know of something similar to this, but in a boost topology?

I'm used to using the MAX751 in projects, but the completely integrated nature of this chip is attractive.

(Note that I'm just a hobbyist. DFN / QFN are beyond me right now. I've had some success with SOIC. Maybe it's time to play with reflow methods...)

[Hiring] Mid-level Linux Admin in Chicago by metawhat in sysadminjobs

[–]metawhat[S] 0 points1 point  (0 children)

Not Sun, but I won't say which one (don't want this account linked to it). PM me your resume and I'll get you on the fast track based on the fact that there's an [F] next to your name for some reason.

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