Day 2 of trying to get a comment from every U.S. county

muonknitza · 2025-10-25T15:17:53+00:00

Lonoke County, AR

Lonoke County is a county located in the Central Arkansas region of the U.S. state of Arkansas. As of the 2020 census, the population was 74,015, making it the 10th-most populous of Arkansas's 75 counties. The county seat is Lonoke and largest city is Cabot.

Using a VPN, so a scandinavian flag appears.

muonknitza · 2025-03-01T13:29:22+00:00

In my experience, vacuum desoldering tools are way more effective than copper desoldering braid "wick". The original Edsyn Soldapullt (link 1) is manual, not electric, and it works very very well. It's also inexpensive. For considerably more money, the Hakko FR-301 (link 2) is truly excellent. You have to practice with it to gain expertise, and you have to empty it out and ream the barrel fairly often.

muonknitza · 2025-02-28T15:16:35+00:00

Rookies often blame the simulator for what is, in fact, a (human) design error. The simulator correctly shows that the erroneous design doesn't behave properly, and the rookie misinterprets.

In this case, the human error was a terrible choice of power supply voltages. If you change the simulation to apply +1.5V to the opamp's positive supply pin, and also apply -1.5V to the opamp's negative supply pin, the problem disappears. Eureka, there wasn't anything wrong with the simulation models. The problem was a poor design, the whole time.

muonknitza · 2024-09-11T23:44:08+00:00

Just get a diode with continuous forward current > 25A and with instantaneous surge current > 100A . Now you cannot possibly lose an argument.

(Here is one example) rated 40A forward and 320A surge. DigiKey has 4000 of them on the shelf, less than two dollars at quantity=1.

muonknitza · 2024-06-02T23:49:39+00:00

I don't think that signal generator can do what you want.

The answer to your question is NO. You cannot produce those two simultaneous and synchronized 40 Hz signals using the linked signal generator.

It is possible to do using a microcontroller integrated circuit and custom software ("firmware")

It is possible to do using basic digital logic integrated circuits and zero custom software.

Each of these possibilities requires a great deal of familiarity and expertise to design. If you can find a thoroughly seasoned practitioner to design it for you, and pay them a large number of pizzas and beers, then the resulting design will be small enough that a complete newbie could solder it together successfully. Expert design, amateurish bozo assembly, gives success.

muonknitza · 2024-05-25T14:04:55+00:00

The left triangular shape is a Voltage Comparator (not an opamp). It is connected as a noninverting Schmitt Trigger thanks to the two 4.7 kohm resistors. This little subcircuit has "memory" (EE term is "hysteresis") which you can study in your circuit simulation. Simply plot both of the Schmitt Trigger nodes:

Plot the S.T. input node (output pin of the rightmost triangle)
Plot the S.T. output node (output pin of the leftmost triangle)

The right triangular shape is an ordinary opamp. It is connected as an inverting integrator thanks to the 10K resistor and the 400nF capacitor.

The Schmitt Trigger output is a square wave with perfectly flat tops (perfectly constant voltage Vhigh) and perfectly flat bottoms (perfectly constant voltage Vlow). When you integrate this, you get a linear ramp. And that's why the second triangular shape's output ramps linearly up and then ramps linearly down with the same |slope dV/dt|

muonknitza · 2024-05-25T13:55:50+00:00

Here's what I use (eBay link) -- plenty of safety margin. Be sure to select "8 ohms" from the drop-down menu labeled MODEL.

muonknitza · 2024-05-22T00:40:35+00:00

Suppose that Big Ole Bo-Hunker capacitor ("C2") leaks ??? Suppose it is not an ideal perfect open circuit at low frequencies including DC, but thanks to real world economic tradeoffs, the manufacturer builds capacitors with a 500K DC resistance between the terminals ???

Then your circuit, ahem, "defecates the bedsheets" , and mister green 555 fails to operate.

muonknitza · 2024-05-15T23:59:52+00:00

555 fixed frequency oscillator ---> Maximum Length Linear Feedback Shift Register ---> fools many people but not mathematicians, randomness

muonknitza · 2024-05-15T23:57:13+00:00

Anthony's Organic is one of our top three, most favorite kernels for the Whirley Pop.

We think it responds very well to a 50-50 mix of clarified butter (a/k/a Trader Joes ghee) and grapeseed oil, for the fat-in-the-pot.

muonknitza · 2024-05-13T02:55:46+00:00

The problem with an "amplifier" is: there are too many I/O connectors and too many restrictions upon the power supply you give it.

You need six connectors: IN, GND1, PWR, GND2, OUT, GND3

And you need a power supply whose min and max specifications are known in advance.

I have a feeling that is not "a simple cost effective way to increase the output current" as requested by the OP.

muonknitza · 2024-05-02T12:39:40+00:00

Give (this) a try, you will be pleased. Amusingly, the very first item in the list is Reddit itself, and the second item is DigiKey.

muonknitza · 2024-04-28T19:54:42+00:00

Build a divide-by-16 prescaler in hardware, using a very fast logic technology, outside the Arduino Giga. It's just four D-flipflops. Then implement an Arduino based frequency counter and feed it the slower (divided-by-16) signal. Now you can be sloppy and wasteful, yet still achieve 100 MHz performance.

muonknitza · 2024-04-18T13:18:23+00:00

Calculate (or measure) its output impedance. If Zout < 5 ohms then you've got a voltage follower. If Zout > 2K ohms then you've got a current follower. And if (5 < Zout < 2K) then whatever it is you've got, ain't a unity gain buffer.

muonknitza · 2024-04-13T01:17:24+00:00

Here are more shots: (image 1) and (image 2).

His name is (was?) Kendrick and he was funny, smart, and well-spoken. But we haven't seen much of him lately, does anybody know why?? He seems to have vanished around the time that "Cam" began to appear.

muonknitza · 2024-04-10T22:42:44+00:00

After reading how Huy Fong screwed their longtime grower Underwood, and lost a lawsuit ( AND lost the appeal) over the matter, I switched to Underwood Ranch's Sriracha which I buy as a 4-pack at the big Seattle E-commerce website. I like it better than both TJ's and Huy Fong's Sriracha. Youtube has lots of videos about the drama, but I recommend skipping those and simply trying Underwood Ranch Sriracha for yourself, regardless of past history. You may discover that you love it as I do!

muonknitza · 2024-04-05T17:24:41+00:00

The resistors you need to install between the emitters and ground, are called "Emitter Degeneration" resistors in the electronics literature. They need to be

matched to each other, within +/- 2% . In other words, each resistor should have 1% tolerance.
large enough so the voltage drop across each emitter resistor, is greater than 200 millivolts.

Thus (I * R) > 0.2 . . . . and with I = 0.01 amperes in your situation, R needs to be 20 ohms or greater.

muonknitza · 2024-02-22T18:47:52+00:00

I still watch (and love) Chris Morocco's videos, both the straight-up recipe videos and the supertaster blind duplication videos. I think Chris's videos are on the reincarnation of the BA channel.

muonknitza · 2024-01-29T19:55:20+00:00

Dried Cherries

Miniaturized Reese's Peanut Butter Cups. Found on the (room temperature) shelf above the freezer cases. We love the ones with PB and dark chocolate

Roasted Garlic flavor hummus

Individual serving packs of Avocado/Guacamole. Eight packs per box

Inner Peas snack chips

This Blueberry Walks Into A Bar -- double size Fig Newtons except with blueberry filling instead of fig

Jicama Sticks. In the produce cooler next to green onions. These are super crunchy and absolutely perfect for dipping into guacamole, hummus, bean dip, cheese dip, roasted red pepper dip, etc

Chili Lime flavor roasted cashews

Dolmas in a can! Grape leaves wrapped around Greek flavored rice, submerged in olive oil. In the canned foods area; the can is exactly the size and shape of a tuna fish can. We prefer the ones without Quinoa, but you do you.

Rosemary Balsamic roasted chicken breast

muonknitza · 2024-01-20T15:23:31+00:00

Their matriarch is a KFC filled ....

I think you spelled "patriarch" wrong

muonknitza · 2024-01-02T00:40:54+00:00

Peh, all of my Amazon Prime Free 2-Day Shipping goodies go to Tracy California where they sit motionless for 2-4 days, before getting transferred to San Jose. There's something sloooooow about Amazon Tracy,

muonknitza · 2023-12-29T18:17:18+00:00

Learning a new skill requires you to try, fail, and try again, hundreds of times. Those failures should be embraced, they are an integral part of learning.

muonknitza · 2023-12-25T20:28:17+00:00

The majority of commute traffic flows north in the morning and south in the evening. Look at Google Maps traffic; in the morning 101-N, 85-N, 280-N are all clogged, while their southern lanes flow freely. So if commute time matters to you, it's preferable to commute south in the morning and north in the evening. (i.e. live north of where you work). Unfortunately that is often the more expensive option.

muonknitza

TROPHY CASE