Dumb battery question

How can I use button batteries in place of a 9v?

Topic by theglove   |  last reply

Yet another dumb question?

Hi Guys, ( I am prickly) I am really excited as I'm going to make my first project ever that includes resistors. I needed some help regarding (no not resistors) batteries. I need to chose which battery to use either 2 AA batteries (3 LED's in parallel)  or a 9v battery  (3 LED's in series). I want to choose the way in which the LED's will be brighter for longer. Thanks in advance -Prickly Potato 

Question by SA-DIY   |  last reply

no thumbs day

Friday August 24,2007. i am declaring this no thumbs day! A day in which I will not use my thumbs. Whos with me?!(crickets chirping)

Topic by tomonto   |  last reply

Uhhh, Soo Stupid!

Well, i'm not allowed to play knex for a while, cuz i shot my 11 year old bro. Let me tell you the story: I built a cheap block trigger, with  a red firing pin (sorta like the one in the picture) and shot his hand from a good distance (6 feet) and he started crying. Get This- The gun had two really stretchy elastics on it, and it couldn't even shoot across my room! I shot my hand from 0.5 feet and hardly felt it! Now my knex is taken away!

Topic by Seleziona   |  last reply

[Silly Question] Looking for letter endings for hackers and electronics enthusiasts. Answered

I need suggestions for letter endings that are appropriate to the tech/programming/hacker world for emails. Something like "Peace and Prototypes" but much less cheesy. Also, do these things have a name other than letter endings?

Question by jrh065   |  last reply

Help Mod a Dumb Car Screen

So I have my first car with a smart screen..This is a 2019 Subaru Forester with an insulting first screen..Anyone know how to hack the screen with my Puppy Pic..

Question by iceng   |  last reply

How do you vote?

I've been here a while but i still haven't found out how to vote. Can you help?

Topic by chopstx   |  last reply

How can I make a parachute out of home made objects and that doesn't cost to much. Answered

I am really bored and I have a pretty high up porch. Is there anyway I can make a parachute out of home made objects that won't cost to much and will actually work?

Question by lakerman23   |  last reply

I need help creating a telephone network!

Hey! I was wondering if there's any clever people out there who can help me with my ambitious project. I'm doing some creative direction for an event and aim to create a telephone network within the venue. I want to put phones on tables and use the table numbers as the phone numbers... I also would like a way of recording everything thats said over the course of the night through the telephones? I have a very basic understanding of how these things work, I've made circuits before- but i am an artist, not an electrician so please be kind and explain to me like you would a child! I've got my hands on a load of old phones, so I just need to rewire them I guess?  Thanks!

Topic by kittyjrt   |  last reply

Most Embarrassing (thanks Skate) Moments.

Ok, everybody's got one. WHat's your most embarassing moment? You know: split your pants, threw up on a friend, toilet paper stuck to your shoe, forgot to cover a hickey- that sort of thing. I'll go first. Today at church (I'm the minister for a small congregation), I forgot and left my cellphone on. "No big deal" you say? My ringtone is David Allen Coe (a VERY "In-your-face" and "offensive in a funny sort of way" country musician). I was just finishing up Sunday school, and getting ready to give my sermon. Then the phone rang, everyone could hear..... "I was drunk, the day my mom, got out of prison...". My wife quickly hung it up (but didn't turn it off). Then it rang AGAIN!! I was looking for something to crawl under. I wanted to die! The church-members all laughed (because they know my sense of humor), but I turned red as a beet. I stepped outside, and returned the call, as we were sort of at a stopping place. I figured it must be an emergency for anyone to call me in the middle of "church". It turns out the call was a church member, who's been out of town for a couple of months wanting to wish everybody well, and see if he could listen in on part of the service. Moral of the story: Get a different ringtone!!! OK, Who's next?

Topic by skunkbait   |  last reply

Can dumb / feature phone be charged using USB?

Hello, I recently received a USB power pack but I can't seem to charge the dumb / feature phones that I have.  When I use this adapter to connect the phones they say that they are charging but even after 5 hours they seem like they didn't get a charge t all. Is the voltage difference the issue? With the USB being 5V and the phone battery being 3.7V (though the output of the chargers that the phones came with is 5V). Could I have a faulty unit? Thanks for reading.

Topic by Full Metal   |  last reply

Dumb keyword question -- what does "rhs" stand for?

I was looking at Noah's new Office Weapons Guide, and noticed that it included the keyword "rhs". I'm only familiar with this meaning "right hand side" (a.k.a. "rvalue" in C). But it seems like there are a large number of guides (all of them? No, all but about 20) with this keyword included. What does it mean?

Topic by kelseymh   |  last reply

Is my RGB LED broken, or am I just dumb? Answered

I have a 10W RGB LED like this one: http://dx.com/p/10w-1000lm-rgb-light-9-led-module-silver-white-9-11v-168507 It's rated to 9-11v, so I hooked it up to a 9v battery. The LED has 4 leads: 1) +9v 2) Red - 3) Green - 4) Blue - The green and the blue work as expected, and I can combine them to get cyan. The problem is with the red: 1) It won't combine with any other color.  If the red is switched on, the green and blue switch off. 2) It works on both polarities.... It turns on both with +9v and -9v. Am I doing something wrong?  Am I missing something?  Am I going crazy?  Am I just stupid!? Please help!

Question by Morgantao   |  last reply

I ain't as dumb as they want me to think I am...

As some of you know, I left my job at Christmas to return full time to school to get an engineering degree, I'm kinda clever ;-), but my first full time semester was full of suck. I took Thermo, Dynamics, Solid Mech, and Chem for Eng. Chem for Eng was a joke, I never attended class and got an A. Thermo, the teacher, it was his first time, I learned from the book, got a B+ Dynamics, the teacher was a grad student, and he was incredibly passionate about teaching, great class, harder than hell, got a B. And then there is Solid Mech. The grade has been a sword of Damocles hanging over my head, I was doing so poorly that I even registered to take it again in the summer, the first test, I got a 39, and that was greater than one sigma below the mean. Well folks, I just dropped that summer class because I got a C. Yea freakin' ha!!! I never thought I'd be this excited to be average. LOL. So now I have all summer, only one class (materials) and maybe a part time job, expect to see more (low cost) instructables. Ghod, right now I feel awesome.

Topic by Tool Using Animal   |  last reply

I feel a little dumb, but how do I delete images from my library?

Still trying to figure this site out. It's pretty confusing.. Enjoying my second day though. :]

Topic by Baran Romis   |  last reply

how can I view old instructable newsletters? Answered

There have been times in the past where my instructables have been in the newsletter.  Putting way too much trust in my computer and email service I never backed up these newsletters.  I know, I know, dumb dumb dumb... Moving on though, I went through forums and found a spot that says archived newsletters, ah-ha! thought found it, I was wrong.  Someone want to point out where to look, thanks!

Question by iminthebathroom   |  last reply

If this info is already somewhere else, I apologize ( i.e. dumb question)

When you put up an instructable with pics, do you have to leave your pics in your gallery for the life of the instructable? I.e. if I use a pic in an instructable, then delete the photo from my gallery, does it break the image on the instructable? Thanks for any info!

Topic by jerbtown   |  last reply

How to clean crocodile clips?

I was cleaning my room and found some old crocodile clips, they are all oxidized at the tip, they are like this because when i was like 11 i was into electrolisis, and i used the crocodile clips for that... How incredibly dumb of me :S so How do i clean them? what shall i use? thanks

Question by amando96   |  last reply

what's charcoal briquette?

I might seem dumb to you but here in New Zealand we have nothing with that name?

Question by walterh9   |  last reply

How do fish drink\urinate?

I now it's a dumb question but I was wondering, if they live in water, can they drink ?

Question by Quest for Questions   |  last reply

how do I level a ceiling fan?

OK, I've played with those @%!%^ weights till I'm dizzzy - how do I level this dumb fan??

Question by NanaMomsers   |  last reply

How do I make a guide? Answered

I know this sounds like a dumb question, and I'm probably overlooking something, but how do I submit a guide?

Question by nickodemus   |  last reply

How do I make/hack a DVR?

How do I make a DVR out of a server, a direct tv DVR, a TVO or something like that?  Remember, dumb it down for this newbie.

Question by Hubiewan   |  last reply

does anyone know how to search the instructbles site and NOT the Google site? Answered

Don't mean to be dumb but.....does anyone know how to search the instructbles site and NOT the Google site?

Question by Drboyd   |  last reply

Craft contest

I am a newbie here so please forgive me if this is a dumb question. Are we allowed to submit multiple entries in a contest or can we only submit one? Thanks, Michelle

Topic by MissCrafty   |  last reply

LED Gardening

I heard somewhere that you can use LED lights to grow plants. is this a substitute for the sun? does it work well? (i know, dumb question =P )

Topic by gummyfun   |  last reply

Where has the Vintage contest gone??

There used to be a Vintage contest, It doesn't close for days yet so I'm wondering why it doesn't appear anywhere anymore?  Thanks, sorry if that is a really dumb question!

Question by Taliecara   |  last reply

Sily child...Stun gun?

I don't know who to be more disappointed at... the Police, for reacting as such, or the kid for being dumb enough to bring it to a public school.http://www.abc6.com/news/rhodeisland/17283999.html

Topic by jongscx   |  last reply

I've never been able to upload images.

I can upload images, but they don't seem to store anywhere. The only time it has worked, I accidently uploaded a dumb picture as my avatar when I didn't want one. All I did was upload and suddenly, dumb avatar. I couldn't get rid of it, so uploaded another barely acceptable pic in it's place. I can't put anything in my library, or find any standard patch pictures anywhere. Is it me or my software, or a bug? Windows XP Professional V2002 Service pack 3. IE 7.

Topic by caarntedd   |  last reply

i am from nepal. cani participate in the contest. i dont understand the terms and conditions :D ?

I am dumb. plz help. i want to participate in contests and i dont get the terms and conditions

Question by sbhandari3   |  last reply

Atmel 532

Ok so I know this going to sound really dumb but what is an Atmel 532 chip good for?? I tried to google it but none of the results told what it is and what I could do with it? Can anyone here shed some light on it for me?

Topic by mbcharney   |  last reply

Coolest geek at teh dance!

I am in 7th grade and we have dumb all school dances, and i want to pimp out meh outifts, and to show off all my (or lack there of) LED knowledge. ALso , im just bored and want ideas, soo....yea..

Topic by wolf555hound   |  last reply

does anyone have a good resource for introduction to microcontrollers? Answered

I'm talking absolute idiot here. like, imbecile. dumb.  I'm going to need to start from scratch. I just want to know the easiest and quickest route to this, be it a website, a book, or a class.

Question by codongolev   |  last reply


Ok, I'm kinda new, so sorry if this is a dumb question, but I have a Motorola Phone Charger that gives out 5V and 500mA. I want to make it a USB Charger. Will it work? (If I just connect the USB Female End and the Phone Charger directly.) Or do I need some parts or something?

Topic by bloody0986   |  last reply

New flag suggestion

We have the option to flag comments as "not nice", "inappropriate", and "spam". Can we add another flag that reads, "the site is called 'instructables', not 'gobuyables.'" for all the comments where people say, "This is dumb. I could buy that at the dollar store."

Topic by yoyology   |  last reply

SSR and a hotplate

Dumb question. Have a heating plate that uses 1100 watts and runs on 120 volts ac. if 1100 watss / 120 volts = more or less 10amps, Could I safely use a 10 amp rated ssr aka solid state relay or use something higher.

Topic by Computothought   |  last reply

Car Phone

No, not a phone in a car--a phone that is a car, or at least looks like one. This car is a converted VW Beetle that is being used to promote a phone company. I think this may be even more exciting to see on the road than the sheepdog from the movie Dumb and Dumber.Link via TechEBlog

Topic by joshf 

I have two tv remotes and a few old phones. and i'm bored

What exactly should i do? and the LED off the tv remote doesnt wanna work >.> Any ideas? edit: oh wait, that's an IR led isn't it? boy do i feel dumb

Topic by silentjudas   |  last reply

STEP File Import

After reviewing my latest posting, I noticed that I was able to zoom and rotate the STEP files included with the graphics.  Dumb question - has the STEP file viewer always been included on Instructables or is this a relatively new feature?  Anyway, it's a nice feature for people that want a better understanding of the part. 

Topic by mtairymd 

Question about speakers and amps? Answered

Okay, so I want to build a set of two-way speakers. BUT, I'm still confused on this one part. Do I need an amp, or some kind of receiver for them to work? Or can I plug them straight into the device? Thanks for your help, sorry if this is a dumb question.

Question by Zem   |  last reply


I have probably asked enough dumb questions already but I think you could do this. I have an old TV remote control. If I would split it open and disconnect the IR and solder a USB cable to it would it work on the computer? (I would have put batteries in it too.) A program would control the remote.

Topic by popit   |  last reply

calculating MAX7219 resistor value?

I want to use the 7219 to drive two 3digit 7segment displays with these specs. I want to use 1.85v and 18mA. Here's what the MAX7219 datasheet states as resistor values to be used. I'm too dumb to figure out how the resistor value is calculated. Can someone help? What would the resistor value be for 1.85v 18mA?

Question by DELETED_MakiY2   |  last reply

just give us 10 minutes

After we have posted can we have a 10 minute period so we can go back and fix our mistakes? this would be good for all those comments to instructables you post and then look at to find you sound dumb. I mean we've all done it so why isn't there anything to fix it?

Topic by merseyless   |  last reply

Help a newbie with an led matrix.

Hello world of the internet. I have an Arduino Uno, an ICM7218DIJI, and a ton of leds. I want to make a matrix. Preferably a 64 led matrix. I pretty much need help with all of it because I really have no experience with programming, arduino, or led drivers. The best way would be to dumb everything down. Lol,

Topic by Flap jack   |  last reply

I need suggestions for board game pieces...?

 I'm making a board game,and I can't think of a way to make the little pieces...? The characters..? What ever they're called...the part that you move around on the board..  I've thought of a lot of things..pipe cleaners, cardboard, wax, and a lot of other dumb ideas.  Does anyone have any suggestions..?

Topic by kelcylane   |  last reply

Does anyone have a PDF on making a motorized scooter that has 3 decent sized wheels, not those dumb skateboard wheels?

I'm rather large and I figure that multiple wheels and a larger diameter would spread the weight distribution better.? I'm also on an extremely tight budget (read, I need to be able to scrounge materials for free), and have limited tools.

Question by javajunkie1976 

What is wrong with my Uno r3?

Please help.  I have 5 UNO R3 clones and I can't install them on my computer. When I plug them in two red LEDs light and the board comes up under Other Devices as a USB V2 device. I've tried every driver I can find, but none are recognized as suitable. I've tried 5 different boards, two computers Win 8.1 and Win 7. I've swapped cables and still nothing. I have a feeling it could be a lack of a bootloader on all the boards. How would I check if this is the case and how would I fix it? I have managed (easily) to install an Arduino Mega with no problems and I've managed to install many other devices so it's not a case of too dumb. Just a little dumb :-) Any help would be very much appreciated.      Stu

Topic by StuartB4   |  last reply

Possible to convert 110v ~ battery charger to 48v charge controller for wind/solar?

Here is the item in question. http://tinypic.com/r/2rfr2px/6 I'm not even sure if it's a smart or dumb charger. I also can't seem to find any schematics for a 48v charge controller anywhere. =o/ Thanks for any help anyone can give!

Topic by StudioAfterlife