How to turn on and off a stream of gas?

The exact setup I have is a little difficult to explain, but basically I'm designing an extremely simple heat engine, based on boiling ethanol, and need to be able to mechanically alternate the flow of vapour. I have a little boiler, sealed except for a pipe out of which the vapour escapes. This lifts the column of ethanol in the pipe, pouring it into a water wheel which turns. The ethanol then runs back through a second pipe into the system to be pumped up again. It works, and fairly well since I'm not looking to get a lot of power or efficiency, but only if I pinch the tube on and off. This allows the bubbles to collapse, which sucks in more ethanol to replace them. When I release the tube the bubbles rush out, lifting the eths, and repeat. I have two valves to keep the system one directional. So now I'm looking for a way to automate the opening and closing of the gas feed. I've been trying a few things but nothing seems to work well enough yet. The other consideration is that; due to the nature of the larger project, whatever I use has to be extremely simple to construct, preferably from reclaimable materials. 1 second on, 1 second off seems to work best. Any ideas? cheers, Daniel.

Posted by SolarFlower_org 8 years ago


Would it be possible to turn seats around? Answered

Would it be possible to turn seats around? Like in a ford escape take the rear seats out, and reverse them so they face backwards?

Asked by frisbeechamp1983 6 years ago


when I turn it on or try to press

Thereafter, when I turn it on or try to press the ClockworkMod Recovery bootkey combination (Vol Down, then power, wait, then release power when logos come one) it says on the permenant startup screen (schreenshot below).

Posted by fhfqhdmv 4 years ago


Turn Signal Bike Jackets

Looks like Leah Buechley has been busy making even more Turn Signal Bike Jackets. From her Flickr post: on the steps of Shih Chien U, prototyped by me w/ parts from the taipei electronics markets & made by (awesome) Shih Chien University fashion students via CRAFT

Posted by fungus amungus 8 years ago


Cd player turn table

So I want to try to turn a old sony cd diskman circa 1999 into a turn table for cds. My idea here is to have it play but I can stop the disk with my finger and hopefully get a skipping effect, the other idea is to be able to freely move the laser eye and have it still play while doing it. I already have it soldered up so that it can play without the case and have a 9 volt connected to it, but thats about it. Anyone have any idea on how this could be? 

Posted by wickednick 6 years ago


how do i turn auto logoff off?

Its simple, for a game i need to keep logged on. but after a certain amount of time, it logs off. windows XP service pack 3. ask for more info if u need.

Asked by godofal 8 years ago


Petit computer Turn-based game

This is my game I made for petit computer.  It was something I wanted to make for a while.  You will need DSIware; "petit computer" to download this game.  The black background QRs are for Version 0.5.7.  In version 0.5.7, I made a Japanese translation. See on wikia: http://petitcomputer.wikia.com/wiki/Generic_Turn-Based_Game

Posted by nancyjohns 3 years ago


I need some advice with a transistor in a turn signal circuit. Answered

I am working on a turn signal system for a recumbent trike and it isn't working correctly. It's based on your basic 555 timer to provide the flashing. An on-off-on toggle switch will select left or right. I didn't want to be running the 555 timer all the time so I thought I would power it through the switch. D1 and D2 ensure the timer is powered when left or right is selected while only energizing the correct transistor. The visible LEDs will be dash panel indicators and external light clusters will be connected to the jacks. The problem I am having is that both left and right lights flash with the switch in either position. I'm pretty sure that the 555 is actually powering both indicator LEDs on it's own through the bases of Q1 and Q2, instead of just switching them on and letting the current from the switch do the work. I only had generic transistors hanging around and I'm wondering if using MOSFETs would solve this problem? My understanding is that they would not conduct enough Gate to Drain current to power the LEDs.

Asked by AnotherBrian 9 years ago


AC 30v 50/60Hz Synchronous Motor from 110

So I bought some Mirrowave turn table motors to use as an Epoxy Rod dryer I knew I didnt want the 220's and thought I had bought 110 AC  but they are  AC 30V    3W   I have 4 of them and need to know a cheap way to wire em up.  Was being cheap and didnt want to pay $10 a motor and got all 4 for $10 but now I see I am going to need a voltage reduction and or transformer.  Was thinking one of my old printer or laptop cubes would work.. but those are all AC/DC converters :-( I am pretty good with hands.. but Electrical circuits not my strong suit. 

Asked by ToddG39 6 months ago



Why is it so hard for people to use their turn signals? I guess its way over some peoples heads? Answered

I drive allot for work, I see people endangering me and everyone they share the road with concealing their intentions to turn or change lanes. Most people I see just slamming on the brakes and turning are younger drivers who I suppose have not developed enough brain power to use the highly complicated device known as the turn signal. Others are just lazy and don't care if they get side swiped. I know its hard people but get your knuckles off the ground and check your blind spot and use your turn signals....

Asked by nickademuss 9 years ago


Wireless Turn Signals

I have toyed around with the idea of making a jacket that has the turn signals and/or brake lights on the back. However, there is a twist, I would like to see a controller box to wirelessly send the signal from a scooter to the jacket. When the turn signals and brakes are used on the scooter it sends a wireless signal to the controller in the jacket which relays that to lights on the back of the jacket. I've seen some jackets with lights wired on to them controlled with an arduino.

Posted by partyone 8 years ago


Turning a threaded rod with a motor?

Hi everyone, I'm wondering how I could make a motor (with a 4mm shaft diameter) turn a 1/4 in. metal rod. I'm planning on supporting one end of the rod in a piece of wood, and the other of the end will be attached to the motor so that when the motor spins, the rod also spins in the wood.

Asked by nelsonliu 4 years ago


electronic switch

Hi, i'm a bit new to electronics. I was wondering if its possible to turn on the flow of current by another electrical signal. Yes, i know about transistors and relays but these switches turn off as soon as the second current is stopped, how to make this change in switch permanent, i'll be precise, i'm working on a laser alarm system, and it works fine, but the thing is that when i block the laser, sure the buzzer goes off, but when the obstruction is moved, the buzzer turns off, how can this be kept on until turned off manually by a switch. i know it must be quite simple but i dont know, please help thanks

Posted by walee 1 year ago


How can I modify my vacuum to turn the brush roll off?

I have https://smile.amazon.com/Hoover-Cleaner-WindTunnel-Lightweight-UH70120/dp/B002HFDLCK/ref=pd_ybh_a_14?_encoding=UTF8&psc=1&refRID=GR3CWSF52RR4YEMDSQWV this vacuum. I love it, the Hoover Vacuum Cleaner WindTunnel T-Series Rewind Plus Bagless Lightweight Corded Upright UH70120. I was wondering if anyone had a hack to make the brushroll turn off for hard floors. it currently doesnt have that option. Thank you!

Posted by JuliaM115 1 year ago


Digital Music stand with timed page turning.

I really need to make a digital music stand.  Setting up multiple paper pages on a stand is extremely inconvenient.  It takes longer to set up the music than to play the song!  Plus, even with the arms extended on my music stand, it can only hold 4 pages max.  Some songs can be 10 pages or more. So here's what I'm thinking: A raspberry pi running a program to view .PDFs and a flat screen TV or monitor mounted to a music stand. W. Wayt Gibbs, here --> (http://spectrum.ieee.org/geek-life/hands-on/diy-handsfree-sheet-music) has already built the exact thing that I'm thinking of.  However, I'll be using this for drum music so my feet will be busy enough without having to use a foot pedal to turn the page (Maybe I'm not that coordinated. Definitely won't be chewing gum while playing!) So I'm wondering if anyone has any ideas about automatic page turning. My idea would be a .PDF viewer that can display 3 pages (so that the page turning doesn't have to be exact) and can be set to automatically turn the pages at a timed interval after i click start.  The problem with this is that each song will have a different timing.  Does anybody know of a program that can turn pages via a timer AND remember different timings for each file? I suppose I could just write the timing setting on the top of each .pdf and set it to that every time I open a file. Also, I'm not a computer programmer.  I have built a home theater pc which gave me a little knowledge.  But, when it comes to raspberry pi's I've never used one.  Is it powerful enough for what I'm proposing? Is that the route you would take? I'm also not sure what to use as an input device.  Maybe I'll just mount a percussion table to the drum rack somewhere and use a mouse on it. I'm open to any and all suggestions about every aspect of this idea. Thanks for any help or suggestions!

Posted by mjccox 2 years ago


How do I build a gouge for a lathe? Answered

I recently built a spring pole lathe and I have not been able to turn any thing yet due to my lack of tools. The cheap set I ordered turned out to be small, flimsy, and arrived broken, they are being returned for a refund. I need a good gouge but dont want to spend 20 bucks for the tool when the whole lathe cost 14 bucks. I was thinking of taking a steel electrical EMS pipe and cutting it in half. Then sharpening the inside edge with a file. Would this work? Is there a better way of doing this or do I just need to go ahead and but the 20 dollar gouge for Harbor Freight. Thanks

Asked by imthatguy1125 7 years ago


Direction/turn signal indicators making them brighter with led bulb I need help pls

Hi. I somtimes ride a 1985 yamaha ms50 pogal 50cc moped. It has an 6v electrial system where as modern day scooters are 12v. I bought a knew indicater relay for it and checked all the bulbs as the turn signal indicators are not so easy to see flashing. I mean, on average sunny day other road users would need to look hard to see them flashing. the bulbs are 6v 15w and both old and knew flasher relays gives output of 6v 40w. I would feel much safer when turning if I had a bulb that gives a brighter flash to give other road users a better idea when im turning. I can see on the web there is a 6v 5w and 10w bulb I can try or even 6v leds but I dont know much about leds. the stanadard factory fitted indicater buld 6v 15w gives an ok flash at night, but in sunny daylight I would need to be close up to see it flash which is no good! I don't want to change the originality of this little ped since it has been carefully taken care of over the years and has made it in intact into current times as is. I need to come up with somthing that will work and if I replace a buld with a 5w or 10w when it should be 15w I may get a brigher flash or just blow the bulb. I wonder was there a problem or just bad design with the indicator lights on the yamaha ms50 pogal when they first came out in the 1980's as I have seen a couple of them fitted with suzuki fz50 indicators and other makes of bike turn signal indicaters on them. I don't think the flashers are faulty I feel they where just made that way. I could be wrong. I suppose there could be a bad earth on the flashers. Sorry to go on so much about this. Im looking for your suggestions for a brighter indicator flashers which is purely for safety reasons. If car drivers can see where im turning, im less at risk of being nocked off by them. Im thinking a higher or lower wattage incandescent 6v buld or even a replacment 6v led buld ive seen on ebay but as I said. I know nothing about led bulbs or even if they will work on my moped. Would a equivalent 6v 15w led give a brigher flash than a 6v 15w tradisional incandesant bulb? can someone help me here pls Here's the led ive seen on ebay http://www.ebay.co.uk/itm/2pcs-E10-6V-9V-12V-24V-INDICATOR-LIGHT-BULB-LED-WL-ay-/330859527741?pt=LH_DefaultDomain_3&hash=item4d08c3be3d these are the standard 6v 15w bulbs i want to replace with brighter led bulbs http://directshopping4u.com/6voltvehiclelighting/P244A10  

Posted by selectauto 5 years ago


my imac g4 won't turn on

I have an imac g4 that i got of one of my dad's friends and it won't turn on. i have tried reseting the PMU but that didn't do anything. it only turned in 2 or 3 times after i got it. ###edit### i have tried putting in a different battery, but that mostly didn't work, i turnd it on once since then

Asked by The nerdling 6 years ago


how to make a 555 flash a led on for 1 second? Answered

And flash off for 1 second too, like a car turn signal? (i am trying to make a turn signal for a rc car project)

Asked by zack247 7 years ago


Anyone knows how to DIY a Solar Turn Table?

 Hi All, I have been trying to DIY a solar powered turn table, those made for spinning small figurines round and round. However, the research I've done so far on turning dc motors as slow speeds have not been so successful. Things like using PWM, variable resistors, all doesn't seem to work well with a solar panel. Does anyone have any idea how I can approach this? Thanks! A sample is www.dealextreme.com/details.dx/sku.6184

Posted by edwardchuajh 8 years ago


my flip camera won't work, and I need some files.? Answered

I got a non-working flip camera from my parent's friends. it just turns on, then back off. I'm thinking maybe one of the files is corrupted. if this is so, then replacing it should fix it. but I can't find anywhere to download them. so if anybody has a flip classic camera, then I would like the system files off of it. just plug it in and copy and paste the root to another folder and email it or upload it or something. just some way to get it to me. or, if you know a different way to fix it, that works too.

Asked by codongolev 8 years ago


Whats the best height for a spring pole lathe? Answered

 Ive been interested in building a spring pole lathe and have noticed many are about 8 feet tall. Im planning on using a bungee cord as the spring so as long as theres room for the spring to stretch would 6 feet work as well. Thanks

Asked by imthatguy1125 8 years ago


What tool would be best to power a pen lathe?

Ive been working on building a lathe for a couple months. My first idea was a spring pole lathe but for several reason that did not work. What cheap tool would be best to power a small pen lathe. Ive been looking around and have seen several people use drills. Is there a better option. I will probably order it from harbor freight . Thanks

Asked by imthatguy1125 7 years ago


How I had a computer turn on automatically when the BIOS did not support It

So, I just got a Kindle and want to automate the downloading of news feeds to it. I wanted a PC to turn on when I woke up in the morning, download the feeds, transfer them to my Kindle, then shut off. First problem: The spare PC I put together for this does not support automatic startup in the BIOS, and neither do any of the other motherboards I had. So, I thought of a way to use an alarm clock to turn it on. When the alarm clock would go off, it had a speaker that would produce a tone. This means it was switching power to the speaker on and off very quickly. This would not drive a relay directly, so I made a "filtering" circuit consisting of a few transistors and a capacitor. When the clock goes off, it charges the capacitor with a transistor. This buffers the on's and off's into a kind of pulsating DC current into the cap. The capacitor drains into another transistor, turning it on. This activates two relays at once. One presses the button to turn off the alarm, and the other turns on the computer. Since the alarm was turned off just a moment ago, the speaker does not sound again and it does not turn the computer back off. In the first picture, you see two sets of black and white wires going into the PC. One comes from the relay to short the power switch momentarily, and the other goes to the +5VSB on the power supply. This line provides +5v at low currents, even when the computer is off. The 5v powers the buffering circuit. That was the difficult part and took about 4 hours. Everything else was easy. When you get a Kindle, Amazon gives you a free email address you can use to send files to it. I installed Calibre (an awesome free e-book manager) on the PC and had it run on startup. I set it up to download the feeds then email them to the Kindle through WiFi. Turning the computer back off was easy as well. All you need to do it make a shortcut to "shutdown.exe -f -s -t x" and add it to the startup folder. The .exe is the Windows shutdown program. -f force-closes any open programs, -s specifies a shutdown (instead of restart, logout, etc) and -t x is how much time it will wait before shutting down, in seconds. I set it to a half-hour. So, now I can have my news feeds on my Kindle before I leave for school. :D Funny thing is, the whole alarm clock bit could have been avoided if I wasn't too lazy to just press the power switch when I woke up in the morning! XD

Posted by 1up 7 years ago


Would it be possible to make a wood lathe using a weed wacker motor ? Answered

 Would I be able to power a wood lathe just using a weed wacker motort? Would I be able to hook a chuck right to it or would I have to use a system of pulleys. I just want to be able to turn small wooden goblets and pens.

Asked by imthatguy1125 8 years ago


Using Raspberry Pi (running Openelec) to turn off TV and Amp when idling.

Hi, I was hoping that you guys might be able to offer some advice to this problem (have looked everywhere and cannot find a possible solution). I have a Raspberry Pi 2 (running Openelec) connected to a TV via an A/V amp. Is there a way, whereby whenever the Pi hasn't been used in a while and goes into a lower power state, it can cut the power to the TV and amp?  The point being that I can then leave the Pi on all the time and simply press the remote to have the TV and amp come on automatically. I have considered power saving power strips but I am not sure that the master socket would work with a Pi because of the small change in wattage between idling mode and full power. The only possible solution I have found so far is somehow to use these: https://energenie4u.co.uk/catalogue/category/Raspberry-Pi-Accessories However, am I  correct in thinking that Energenie only works when you are using the Pi as a dedicated home automation solution? I would be so grateful for any help. Thanks

Posted by elsmandino 2 years ago


Turn Table Greeting Cards

Turntable Greeting Card  Handmade greeting cards are way cooler and more personal than paying $4 for a Hallmark greeting card. Create a sleek looking greeting card to send to a music lover using old floppy discs.  

Posted by Carleyy 7 years ago


Can I turn a laserbeam in a Bigger and wider beam??

Hi, I'm working on a new project and it involves a detection using a Laser... Because the beam is to thin to detect an object i need to increase the thickness of the beam... Is this possible using some sort of lenses? or is there an other way of doing this? Thanks for helping! Greetz Kenny

Asked by zupperzipper 8 years ago


Mario Party Tick Tock Hop game life size: How can I make this work in real life and not cost a fortune?

I want to make the Tick Tock Hop mini game from Mario Party in scale that kids and adults can play. Below is a video of the game. I figure I can use an arduino to run the random switching and speed of the hands. I just dont know if it would be possible to do this with the weight of the hand and the people standing on it. Any ideas?

Asked by ecsaul23 4 years ago


How to make an LED Flashlight burn things without extra components like DVD or CD Rom Diodes?

My friend got an Led flashlight and he opened it up and messed around with a chip inside and he made it burn things. Is there a way to turn mine into one too without new components, Like New diodes, DVD or CD Rom Diodes. Mine runs on 3 AAA Batteries and powers 9 LEDs Here is a picture of a similar model

Asked by K.D 9 years ago


Compaq Presario v2000 Laptop Doesn't Turn On?

Hi y'all! I need a little help. I'm trying to fix my uncle's laptop. It is a Compaq Presario v2000 Laptop. It will not turn on or show any lights on the front(e.g charging, power up, ect.). I have tried blowing out the motherboard, removing and inserting the battery, and testing the DC power jack with a voltmeter. Any help will be appreciated! 

Asked by joespicnictables 6 years ago


Conputer only boots after a replug, help? Answered

The computer boots fine if i unplug the mains then replug - it will then boot perfectly normal, once i turn it off tho it just refuses to turn on, doesnt get to post (screen stays black), so i have to unplug it again and it works fine... have tried different PSU's, CPU's and ram, out of ideas

Asked by Cybot Rules 9 years ago


PSP Fix, Need Help

Hello all! I recently aquired a broken PSP 1000 as sort of a challenge to myself. Now however, I actually want it to work. I need some help with the fix, so here are the problems I have been able to identify: -PSP won't always charge, I strongly believe it is the battery though. When I tilt the PSP around at different angles, it will charge. Also, fiddling with the battery makes it charge. -PSP won't tun on. I have checked the power fuse, and it was burned out. I placed a jumper across it like so many internet guides say, and it now has continuity. When I hold the power switch, the PSP will do one of two things:                                  1. The light will turn off, and then turn back to solid orange (charging)                                  2. The light will turn green for about 0.5 to 1 second, and then turn off -PSP will make a rythmic clicking when not charging, doesn't seem to be a problem though. -Battery is cracked, and I don't know if it works properly because it won't maintain proper contact with the PSP. I have also checked the backlight and USB fuses, they both have continuity  so I'm not worried about fixing them. Right now I would just like it to turn on. If anyone knows anything, please make a comment, perhaps someone else has this problem. P.S.  What is a pandora battery? I keep hearing about those, what do they do? Also, what exactly signifies a "bricked" PSP? Thanks UPDATE: 11/08/2009 I had a friend test the battery, he said the battery works and he charged it for me.  Now the PSP turns on. But, (there's always a but) there is no activity on the LCD. I tried bridging the backlight fuse with tweezers to see if the fuse was the problem, no luck. So what now? All I have learned is that the charge circuit doesn't work and that the PSP turns on with no activity. I held a white LED flashlight up to the screen, but I didn't see anything. any suggestions?

Posted by gimmelotsarobots 8 years ago


Earth Hour 2008

Check this out! Do you want to help stop climate change? Well join the millions who do by, at 8:00 pm turn off all your lights for 1 hour! Join the millions to help make the world a better place! Please send this to your friends! So everybody can join in on Earth Hour 2008.

Posted by TeacherOfTheWays 10 years ago


Trampoline Trick Name

         I have a trampoline, and I can do a pretty good amount of tricks. And recently I was looking for a new trick to learn. I found one that I thought was cool, but I don't know the name. What it is, is a 180 aerial (no handed cartwheel). Most of the time when someone is performing it, they are transferring from trampoline to trampoline at an indoor trampoline arena. If you know what trick I am talking about please tell me.

Posted by SBDFFLS 4 years ago


how to turn a photo into stencil?

I want to turn a portrait into a tracable stencil.

Asked by tbyrd72 8 years ago



do you offer turn mill classes? Answered

Do you offer turn mill classes?

Asked by joshuakettler3 10 months ago



The LED won't turn off?

When I type GPIO.output(yellowLed, False) the LED does not turn off.

Asked by fish3 1 year ago




can you wire this so that when you turn on the lights these turn on to?

I want to wire this so that when i turn on my lights these turn on too. I cant find out how to do this plz help!

Asked by djlewis725 8 years ago


My ipod wont turn on!! HELP!!!!?

I downloaded an app off cydia turned it off then turned it back on but then it wouldnt!! i tried charging it pressing buttons but nothing worked! HELP!!!

Asked by kalebbean 8 years ago


feature cam turning? Answered

I want lessons about turning. I am using a lathe machine. can you help me?

Asked by raul_srajan 10 months ago


HP Pavilion f1503 desktop LCD Flat monitor turns on for about 2 seconds then turns off, what do I sauder?

HP Pavilion f1503 desktop LCD Flat monitor turns on for about 2 seconds then turns off, what do I solder?

Asked by miguelangel 8 years ago


my ps2 turned into black and white?

No color

Asked by 8 years ago


DS Lite turns on, BUT, Both Screens Turn Red...Please, would someone HELP ME?

I think my daughter dropped her DL LIte and now when you turn it on, both screens turn red. The volume still works and it does turn on and stay on. I do hear something loose inside, but I do not have the right tool to look inside to see what it might be. Has anyone ever experienced anything like this and can help me out here?

Asked by cmcaz 9 years ago