At 18.2 megohms (readout is wrong, 20.1 isn’t physically possible) this is the purest that water can get. God I wanna drink this shit. v.redd.it/5wf2n1iyrkd41
πŸ‘οΈŽ 11
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πŸ‘€οΈŽ u/Hypergolic_Golem
πŸ“…οΈŽ Jan 28 2020
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Thank you user MegOhm for gifting me Star Citizen in a random act of kindness!

I was asking some questions in the RSI chat room when MegOhm offered to get me a Digital Bounty Hunter copy of the game.

I just really wanted to make this post to say thanks to MegOhm and to say how awesome this community is for all the help I got last night.

Here is the email I got :)

πŸ‘οΈŽ 60
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πŸ‘€οΈŽ u/zonkyslayer
πŸ“…οΈŽ Jun 30 2013
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Question on voltage limit on gpio pins; can I feed 5 volt ttl levels through 1 megohm resistor in series?

Folks

I have raspberry pi gpio pin (set for input) getting ttl from 555 timer running monostable. The 555 puts out 5 volts logic levels.

Is it safe for me to take the 555's 5 volt output and feed it through a one megohm resistor in series to the gpio pin on the pi?

Is one megohm appropriate or shall I use a different value resistor? Or would a capacitor in series be okay?

I plan to have an interrupt routine be run on the upward slope of the pulse (going from logic 0 to logic 1).

Thank you

Mark Allyn

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πŸ‘€οΈŽ u/maallyn
πŸ“…οΈŽ Jul 26 2017
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MegOhm-Miles vs MegOhm/mile. What is the difference?

My friend is reviewing electrical power topics. We are looking through old dusty books, and came upon transmission line models. They talk about resistance and inductive reactance in per mile which makes sense. But, they talk about capacitive reactance in ohm-mile which doesn't make sense. Can someone clarify what that actually means? Can it be converted to a value of Ohm/mile? Thanks.

πŸ‘οΈŽ 2
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πŸ‘€οΈŽ u/xmclark
πŸ“…οΈŽ Apr 08 2015
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Polymer film generates mechanical energy just by getting wet "it generated about 1.0V with a 10-megohm resistor in the circuit. Capturing that motion-induced voltage in a different circuit and rectifying the signal, charging a 2.2 microF capacitor in about 7 mins to its full capacity" arstechnica.com/science/2…
πŸ‘οΈŽ 2
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πŸ‘€οΈŽ u/Libertatea
πŸ“…οΈŽ Jan 10 2013
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Breakthrough! Complete silence with minimal effort and materials!

Writing this down here. First day.

Take a good copper wire. Use a power cord that you don’t need, for example. Connect this cord to a grounding conduit. If you know how to build your own grounding (you need a yard with soil) then that’s the best, if not, use the house’ existing grounding.

Touch the back side of the ear (more accurately: the skull right behind the ear) (any ear) with the grounding cable. Results: complete silence! No V2K whatsoever, no more philosophical inquiries, no more mental colonoscopies!

EDIT: please don’t electrocute yourself! If you don’t know how to know where to find the grounding wire, and how to measure with a voltmeter that the grounding of your house is actually done correctly, then better if you ask an electrician.

EDIT2: better description of the area to touch: not β€œthe back side of the ear”, rather β€œthe skull right behind the ear”

πŸ‘οΈŽ 5
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πŸ‘€οΈŽ u/supremesomething
πŸ“…οΈŽ Jun 27 2021
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What do you call a man with no arms or legs in a hole?

Phil

πŸ‘οΈŽ 5k
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πŸ‘€οΈŽ u/Rumblebully
πŸ“…οΈŽ Jun 30 2021
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DAD JOKES ARE NOT DIRTY.

Go post NSFW jokes somewhere else. If I can't tell my kids this joke, then it is not a DAD JOKE.

If you feel it's appropriate to share NSFW jokes with your kids, that's on you. But a real, true dad joke should work for anyone's kid.

Mods... If you exist... Please, stop this madness. Rule #6 should simply not allow NSFW or (wtf) NSFL tags. Also, remember that MINORS browse this subreddit too? Why put that in rule #6, then allow NSFW???

Please consider changing rule #6. I love this sub, but the recent influx of NSFW tagged posts that get all the upvotes, just seem wrong when there are good solid DAD jokes being overlooked because of them.

Thank you,

A Dad.

πŸ‘οΈŽ 11k
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πŸ‘€οΈŽ u/Von_Bostaph
πŸ“…οΈŽ Jun 18 2021
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Rational
πŸ‘οΈŽ 8k
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πŸ‘€οΈŽ u/mainhoonmadrasi
πŸ“…οΈŽ Jun 30 2021
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My wife blocked me on Facebook because I post too many bird puns.

Well, toucan play at that game.

πŸ‘οΈŽ 9k
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πŸ‘€οΈŽ u/Zayan-ali
πŸ“…οΈŽ Jun 30 2021
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I'd ruther not say
πŸ‘οΈŽ 7k
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πŸ‘€οΈŽ u/Un_FaZed211
πŸ“…οΈŽ Jul 01 2021
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There are only two white people in the movie Black Panther

Martin Freeman, and Andy Serkis.

They also play roles in Lord of the Rings.

I guess that makes them the Tolkien white guys.

πŸ‘οΈŽ 12k
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πŸ‘€οΈŽ u/jzagri
πŸ“…οΈŽ Jun 24 2021
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HVAC guy replaced capacitor to get the compressor running again. Says the compressor is on its last leg... how can he tell?

It's a 2 ton Tempstar straight-cool and it does have a rough sounding start but it's only about 2 years old. How can he assume it is going bad? Should I just add a hard-start kit along with the new cap he put in?

How can I check the condition of the compressor to see if it really is on its last leg?

πŸ‘οΈŽ 2
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πŸ‘€οΈŽ u/GunsAndHVAC
πŸ“…οΈŽ Jun 15 2021
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My 3 yr old daughter made her first pun today and I almost cried. She was eating an apple and I asked her if she liked apples.

She said apple-lutely

πŸ‘οΈŽ 12k
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πŸ‘€οΈŽ u/Available_Reindeer32
πŸ“…οΈŽ Jun 29 2021
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What did the left eye say to the right eye when they got married?

'Eye-do'

This is my first post pls don't kill me lol.

The people in the comment section is why I love this subreddit!!

Cred once again my sis wants credit lol

πŸ‘οΈŽ 6k
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πŸ‘€οΈŽ u/tieyz
πŸ“…οΈŽ Jun 27 2021
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What was a very common name in the middle ages?

I heard parents named their children lance a lot.

First post please don't kill me

Edit: i went to sleep and now my inbox is dead, thank you kind strangers for the awards!

πŸ‘οΈŽ 9k
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πŸ‘€οΈŽ u/give_me_my_identity
πŸ“…οΈŽ Jun 24 2021
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Apologies if it's a bit corn-y
πŸ‘οΈŽ 3k
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πŸ‘€οΈŽ u/mediashiznaks
πŸ“…οΈŽ Jun 26 2021
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Gottemm
πŸ‘οΈŽ 8k
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πŸ‘€οΈŽ u/Un_FaZed211
πŸ“…οΈŽ Jun 29 2021
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so many choices
πŸ‘οΈŽ 5k
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πŸ‘€οΈŽ u/SailorNebula
πŸ“…οΈŽ Jun 07 2021
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Well that didn't cross my mind
πŸ‘οΈŽ 6k
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πŸ‘€οΈŽ u/JasonPetreasCoach
πŸ“…οΈŽ Jun 11 2021
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He knows too much
πŸ‘οΈŽ 6k
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πŸ‘€οΈŽ u/Potato_salad123
πŸ“…οΈŽ Jun 24 2021
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where do pirates get their hooks?

second hand stores!

πŸ‘οΈŽ 7k
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πŸ‘€οΈŽ u/bigus-_-dickus
πŸ“…οΈŽ Jun 25 2021
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I've just deleted all the German names off my pre owned iPhone..

it's Hans free now..

πŸ‘οΈŽ 7k
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πŸ‘€οΈŽ u/HugoZHackenbush2
πŸ“…οΈŽ Jun 28 2021
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I've spent all morning trying to think of a quality pun, just to come up with THIS otter rubbish.
πŸ‘οΈŽ 3k
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πŸ‘€οΈŽ u/awesome_smokey
πŸ“…οΈŽ Jun 28 2021
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My 6 year old wanted me to share his joke with you all. What is a horses favorite store?

Old Neeeeiiiiighvy

πŸ‘οΈŽ 9k
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πŸ‘€οΈŽ u/WantedDadorAlive
πŸ“…οΈŽ Jun 28 2021
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3.14159265387279 snek
πŸ‘οΈŽ 4k
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πŸ‘€οΈŽ u/After-Satisfaction-3
πŸ“…οΈŽ Jun 20 2021
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Did you know 10+10 and 11+11 are the same?

10+10 is twenty and 11+11 is twenty too

πŸ‘οΈŽ 5k
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πŸ‘€οΈŽ u/theimmortalmeluhan
πŸ“…οΈŽ Jun 27 2021
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Rock bottom
πŸ‘οΈŽ 4k
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πŸ‘€οΈŽ u/Theo19555
πŸ“…οΈŽ Jun 23 2021
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How much does it cost for a pirate to get his ears pierced?

A buck-an-ear!

I Thank ye kind Matey for the booty! I be truly overwhelmed! Thank you!

Holy cow! Thank you everyone for the upvotes and awards! I wasn’t expecting this!

πŸ‘οΈŽ 6k
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πŸ‘€οΈŽ u/motherduck5
πŸ“…οΈŽ Jun 25 2021
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What pan is the best to make sushi in?

Japan.

πŸ‘οΈŽ 5k
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πŸ‘€οΈŽ u/Most-Stomach4240
πŸ“…οΈŽ Jul 01 2021
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My Son Ate a Bunch of Scrabble Tiles. My Wife is Scared but I'm not...

He should have a good vowel movement. His next diaper change could spell disaster though.

πŸ‘οΈŽ 8k
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πŸ‘€οΈŽ u/hypeaze
πŸ“…οΈŽ Jun 23 2021
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Chinese takeout: $11.77. Price of gas to get there: $3.00

Making it all the way home and realizing that they forgot one of the containers:

Riceless

πŸ‘οΈŽ 5k
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πŸ‘€οΈŽ u/Available_Reindeer32
πŸ“…οΈŽ Jun 28 2021
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Two drunk guys were about to get into a brawl. One of the guys grabs a stick and draws a line in the dirt and says "If you cross this line, I'll hit you in the face"

That was the punchline

πŸ‘οΈŽ 9k
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πŸ‘€οΈŽ u/Available_Reindeer32
πŸ“…οΈŽ Jun 29 2021
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I threw up in the toilet
πŸ‘οΈŽ 3k
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πŸ‘€οΈŽ u/exotic_butters1275
πŸ“…οΈŽ Jun 25 2021
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Do I need antistatic wrist bands when already grounded?

Help me out with a little confusion. Do I need antistatic wrist straps when I am-

  1. Bare-footed and not touching the ground?
  2. Bare-footed and touching the ground?
  3. Insulated like wearing rubber shoes or standing on wood?
  4. Wearing Handgloves?

A little bit of explanation would be nice. If I'm not touching the ground then no electricity can pass through me, so why do I need the band? And if I am touching the ground, I am already grounded, so why do I need the band again? And if I am on some kind of insulator would that act as an alternative to the antistatic band?

πŸ‘οΈŽ 3
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πŸ‘€οΈŽ u/OrKliD_ObeliX
πŸ“…οΈŽ May 27 2021
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Hot
πŸ‘οΈŽ 6k
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πŸ‘€οΈŽ u/AlexxFruit
πŸ“…οΈŽ Jun 22 2021
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Proud dad moment.

Keep in mind, my son is 4 years old, so everything is an original to him.

I had to work late into the evening yesterday, and he was just going to bed when I got home. I had left home for the office nearly 14 hours prior, had a long day, lots of meetings, traffic, etc.

When I walked through the door, I was exhausted, run down, and starving. My wife hugged me and asked how my day was, and I replied, "Done. It was a good day, but has got me exhausted. I just want to grab a bite and go to bed. I'm hungry."

From my son's bedroom, I hear him shout, "Hi Hungry! Nice to meet you!"

Not only did it make me laugh, but I completely forgot about how hungry and tired I was. I went to his bedroom, and we laughed together about it. It was exactly what I needed.

Edit: Thanks for all the awards, kind strangers! I'll let my son know y'all enjoyed his joke too!

πŸ‘οΈŽ 4k
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πŸ‘€οΈŽ u/LaBarbaGuapa
πŸ“…οΈŽ Jul 01 2021
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Saw this on insta @PunHubOnline
πŸ‘οΈŽ 5k
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πŸ‘€οΈŽ u/Haidi7
πŸ“…οΈŽ Jun 26 2021
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Had a good chuckle
πŸ‘οΈŽ 7k
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πŸ‘€οΈŽ u/LittleBigOwl
πŸ“…οΈŽ Jun 21 2021
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DIY preamplifier for piezoelectric elements, powered by +48 volts phantom power.

The problem with piezo pickups and piezoelectric crystals is that they are not well matched to typical audio inputs. By their nature they can generate a lot of signal, but they cannot drive a 50 kilohm typical line input. The pickup needs to work into a much higher impedance, typically 1 megohm or so. That was not a issue with pure tube amplifiers, because they are high impedance inputs by nature.

So what to people do? They go and plug a piezoelectric disks output directly into the line input of their recorder, typical impedance 50k, or the plug-in-power mic input of their recorder, typical impedance about 7k, and they start to bitch and moan that this damn thing sounds tinny. Which is does ! But they don't understand why!

The reason why these devices often sound tinny is because the piezo sensor presents its signal through a series capacitance which is small, typically 15nF or less. When wired to a normal 50 kilohm line input this forms a high-pass filter, which eliminates the bass.

This circuit board solves that: https://github.com/Supermagnum/piezo-balanced

πŸ‘οΈŽ 26
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πŸ‘€οΈŽ u/erilaz123
πŸ“…οΈŽ Jun 06 2021
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Today on a walk my son was asking about a bunch of plants and stuff, he pointed to one and I said it was a fungi.

Without missing a beat he asks "Daddy, do you know how much room you need to grow Fungi like that?"

I did not know.

So he tells me "as Mushroom as possible!"

So proud.

πŸ‘οΈŽ 9k
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πŸ‘€οΈŽ u/smoffatt34920
πŸ“…οΈŽ Jun 26 2021
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At what point does it stop being grave robbing and start being archaeology?
πŸ‘οΈŽ 2k
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πŸ‘€οΈŽ u/Unholy_Jer
πŸ“…οΈŽ Jun 28 2021
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What did Jay-Z call his wife before they got married?

Feyonce

πŸ‘οΈŽ 9k
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πŸ‘€οΈŽ u/Available_Reindeer32
πŸ“…οΈŽ Jun 22 2021
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So my dad just died because he needed blood and we didn’t know his blood type.

He was so brave and even tried to encourage us, the family around him, with his last breaths. He kept whispering to us to Be Positive.

πŸ‘οΈŽ 10k
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πŸ‘€οΈŽ u/BritishTeeth11
πŸ“…οΈŽ Jun 14 2021
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The elderly wife in church turned to her husband and said, β€œI’ve just done a silent fart. What should I do?”

He said, β€œChange the batteries in your hearing aid”.

πŸ‘οΈŽ 11k
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πŸ‘€οΈŽ u/BritishTeeth11
πŸ“…οΈŽ Jun 19 2021
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Air and space museum
πŸ‘οΈŽ 3k
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πŸ‘€οΈŽ u/romroming
πŸ“…οΈŽ Jul 01 2021
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