I want to use a hobby motor with arduino as input , do I connect it directly or I need some circuits? Thanx In Advance!
Asked by Bot1398 6 years ago | last reply 6 years ago
I am writing an Arduino program to read speaker inputs for a test station. I need only to know when a speaker lead is on or off. This will be done by using the fade and balance. Originally I was connecting the speaker leads to the analog inputs and could get a single line to work as a simple VU meter. Multiple lines gave issue. Since I don't need to know the actual level, just whether they are on or off I'd like the speaker lead to trigger a transistor connected to a digital I/O pin on the Arduino. Any thoughts or quick schematics on how to do this?
Posted by dbirky 4 years ago | last reply 4 years ago
On the two inputs of a standard comparator op amp (say for example LM741) they usually connect resistors from both the positive and negative voltage rails .Why do they do this and how does this work . This has been on my mind for a really long time . Could someone give me a really detailed explanation maybe with images if possible , cause this would be really helpful in the building of my next project .Most of the tutorial videos out there , i don't understand either. Thank you in advance
Asked by Strontium 4 years ago | last reply 4 years ago
I need this simple device, because i have two audio interfaces (one for guitar recording and one for vocal recording) and when i change audio interface i need to disconnect output cable, of first interface, from my monitors and then connect output cable from second interface to my monitors. So with this I can choose between two different stereo audio inputs and send one of them to output. I am using TRS connectors, but i will also need XLR version of this. Check out this picture:
Posted by Necrofenser 5 years ago | last reply 3 years ago
Fixin’ to make to magnetic board and need some input on what to purchase. I’m seeing several types of sheet metal. There’s plain sheet metal, zinc plated, cold rolled, weldable, galvanized, etc. Is there a particular type I should purchase? Hoping to avoid anything that will tarnish or leave marks on any paper out on the board. Thank you for your input!
Posted by jpmarth 5 months ago | last reply 5 months ago
I have an idea to do a total conversion on a cellphone, including things like a steam-driven charger, etc. The issue I am running into here is if I could, I'd want to make it rotary. I saw Randofo's PIC method for making it a USB input here but I have no clue in terms of how a cellphone works, or any of the chips involved. Sadly, my knowledge is mechanical, not circuitry. Any sort of ideas are welcome... please help me progress on what I hope to be my magnum opus of steampunkerie.
Posted by Harlequin 11 years ago | last reply 11 years ago
Well I want to make a stereo Vu meter for my computer. https://www.instructables.com/id/SOCKO0TFI36FRXJ/ I want it to be stereo but dont know how to do that. Im planning to cut a headphone to get the audio jack and thats stereo so how will that go into the scematic. (excuse the spelling its late)And does anyone know if i can find the ic at radio shack
Asked by sunny342 9 years ago | last reply 9 years ago
Plz help me to, how can i receive signal or instruction from paralel port, how should i send current/signal to its register. what equipment should i need. actually i want to develope a system in c language to control electricity of home, doors or widows, so i need to check that if the door is open or closes. when door closed then computer should indicate me that the door is closed, and same door has opened. sir plz give me guideline. i would be very very thankfull to u. ( simply tell me how current/data/signal can be sent through parallel port, current source, equipment ets, after that i will make sensers for it my self)
Hello, I have created a simple circuit where 2 10k resistors make a voltage divider. Supply voltage is 12.5V and if I measure in between the 2 resistors, I'm getting 6.3V. Great! Now I connect that 6.3V to the +input of an OpAmp. Result: the value is still 6.3V. Great! (The OpAmp is also fed with 12.5V) Now I connect the -input of the OpAmp to the supply voltage (12.5V). The voltage in between both resistors suddenly changes from 6.3V to 10.1V. NOT Great! Now I connect the -input of the OpAmp to ground (0V). The voltage in between both resistors changes from 6.3V to 2.4V. ?! The output of the OpAmp is not connected to anything. I thought that OpAmp inputs, in theory, have infinite resistance? The datasheet of this OpAmp (LT1253) sais the input resistance should be 10Mohm I also tested this same thing with the LT1497 and the results are the same. When the -input of the OpAmp was connected to 12.5V, I measured the current going into that pin, 39mA!! (Only measured on the LT1253) What's the problem here? Are both OpAmps broken? Or is there something about the way OpAmps work, that I clearly don't understand?
Asked by DELETED_Electorials 4 years ago | last reply 4 years ago
I have a ford laser. i want to instal aux input into it so as to listen to mp3 and i-pod. can you please advice the instructions and the wiring diagram.
I have a Coby portable DVD player that is malfunctioning in that it won't play discs, but the video display appears to be working normally. The jacks on the player are output only and I'd like to be able to switch one of them to an input jack so I could have an additional screen running off of a newer portable DVD player. Are there any known instructions out there? Is it feasible? Thanks, Jim
Posted by jimmilt 10 years ago | last reply 8 years ago
hello, my question is this: I have a 2.5 inch LCD screen, a console "microboy" Specifications: Console - display my question is: I can input video in any way? ( video out jack is broke) thanks I have also a "ipaq" poket pc without battery and peripherals expansion, only sync dock and charger. thanks again and greetings from Argentina
Asked by zatanclauss 8 years ago | last reply 8 years ago
Hey guys! Another question involving buttons. I have a button and the first time that it is press I need it to be ignored. On the second button press I want it to turn an LED on. Thanks!
Posted by HavocRC 5 years ago | last reply 5 years ago
I'm building a 'time fountain' and i'm planning to make the arduino know how many droplets of water are falling each second. My ideia was to get two wires, get them really close and when there was a drop of water the circuit would close. The problem is, how do i get arduino to get readings right out of this? o (droplet) (positive) ---- ---- (analog input)
Asked by Sowee 5 years ago | last reply 5 years ago
Asked by chamwildenburg 7 years ago | last reply 7 years ago
I have an outdated (but retro & cool-looking) Sony Watchman FD-500. It has a powerful radio & speaker as well as a 5" black and white tube television. Although digital broadcasts have pretty much ruined any chances of getting TV signals on the screen anymore, there is a 1/8" headphone jack-sized input on the rear for "EXT ANT". i found a coax-to-jack converter that allows me to plug in video inputs like a Nintendo once i tune it to Channel 3. I was wondering if this same jack can also be used to feed in audio from an iPod or phone. Since it looks like a normal headphone jack I tried the obvious, a direct input, but something isn't going through. Here's a link to a page with photos: http://www.radiomuseum.org/r/sony_mega_watchman_fd_500fd50.html
Asked by noapparentfunction 5 years ago | last reply 5 years ago
I'm having a hard time finding parts like these - is anyone aware of an RGB LED capacitive touch button? Preferably with the light and the touch sensor separate (DPDT-type, perhaps?). I'm looking to make a physical prototype of a mobile puzzle game I'm working on, and this would be an ideal input method. Thanks! -Jesse
Posted by xepherys 3 years ago | last reply 3 years ago
Thank you for responding.
Asked by PLTWcole 4 years ago | last reply 4 years ago
Hi guys, I have a really burning question thats been eating me for a while. Can you put an alternative input on a stereo system to read mp3s? For example i have this stereo that plays mp3s but only has the disk input. This means in order to use it i have to burn the songs i want off my computer on to a disk then i can listen to my music. For those who probably WILL ask, I don't like playing my music off my computer because it's generally really loud, i want to use this in another room as well. My taste in music constantly changes, eventually i will want to remove a couple songs or add new ones. With that said, i want to know if you can remove/replace or add another input system to where a CD reader would be so that it reads a USB input or something. Then music can easily be manipulated to the users liking. As long it's not directly connected to a computer or requires the user to make new copies of the same music that take up space. Thanks!! Gonazar
Posted by Gonazar 10 years ago | last reply 10 years ago
I've got a cheap voice changer that is hard-wired to a computer-style microphone. I cut off the mic and added a 1/8" miniplug adapter, so as to increase flexibility. I need to connect the powered headphone output of an mp3 player to this voice-changer, what is the easiest way to do so? I tried an attenuator I had lying around, but got no results (are attenuators one way?) is there a good (cheap) solution to this problem?
Posted by gschoppe 11 years ago | last reply 11 years ago
I'm having problems finding and figuring how to do inputs with mirocontrollers VIA button press >> led goes on.(I have a ATTINY2313)Outputs are as simple as PORTB = 0x10 (being hex for pin 16). Keep in mind I'm very new to micros and C. The most I've done was fast-slow blink patterns. How can i do inputs though? SIMPLE code sample is welcomed!
Posted by Killa-X 10 years ago | last reply 10 years ago
Hello, I recently acquired a seeed motor shield http://www.seeedstudio.com/depot/motor-shield-p-913.html But what i notice now is that there is nowhere to attach my Sr04 ultrasonic sensor! How do I include sensory input on my robot with this shield? Thanks bunches.
Asked by TheIronHobo 5 years ago | last reply 5 years ago
I'm looking to make a rather large input selector for a propose project a coworker is looking to commission me to make. I know I can buy a board that will be able to handle about four, but I need about 20 or so selections. I'm looking to make your basic AV selection box, where if you press a button, any other pressed button will be released. Any help is greatly appreciated!
Asked by DoctorWoo 5 years ago | last reply 5 years ago
Im getting increasingly intested in vbs and was wondering how to make an input window for example "Your password" and the "password" could be saved in a txt file stored somewhere, i have the start but dont know where to go from there!"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""WScript.Echo "Your computer is being hacked please enter your password to stop hacker"Set WshShell = WScript.CreateObject("WScript.Shell")Password = InputBox("Please type your password.")""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""Thanks
Posted by k_man 10 years ago | last reply 10 years ago
So I've heard it is possible to use a high voltage DC input with a 3 phase motor controller, but I haven't really found much info or instructions on how to modify them to be able to take a DC current. I am interested in this because I want to experiment with building an electric vehicle and a industrial motor. I bought a cheap, used VFD and a motor to experiment with, but it would be great to have some info and tips on how to go about doing this!
Posted by ANDY! 5 years ago | last reply 5 years ago
I want to make a batch program where I can ask an if statement but there would only be a possibility of two responses. For example if I made the batch file asked "Did you have a good day?", I would only want the user to be able to answer y or n.
Asked by Dr. Kreap 6 years ago | last reply 6 years ago
I have a small project I'm working on that uses rechargeable batteries. However I want the device to stop drawing from the batteries whenever an external power source is plugged in. (The external power source would then power the internal battery charger and the main device.) Is there a chip or circuit that could be used for this? My only alternative is to modify the power supply port to include a micro spdt that will switch when plugged in. But I'd rather like to avoid that.
Posted by stalledaction 8 years ago | last reply 8 years ago
Hey guys whats up, I'm a senior in highschool doing an engineering project involving cordless drills. As the "research" part I made a little survey (5 questions, takes like 10 seconds of your time) and I would HIGHLY appreciate it if you guys would just answer a couple of questions regarding the battery life on cordless drills you use. http://www.surveymonkey.com/s/599YLYQ here's the link Thank you so much!
Posted by husamwadi 6 years ago | last reply 6 years ago
On a hand wound transformer for a joule thif wich is the input and wich is the output primary in? secoundary out?, also does it matter if the thick wire (primary) is on the bottom with the thinner (secoundary) is on the top?
Asked by bushman9 4 years ago | last reply 4 years ago
I am trying to build a box that lets me switch between 4 composite inputs and 1 component input. my TV has a component input where the Y jack also accepts composite video. i originally figured i could just get a six position switch and just switch the ground line but then i thought that would end up sending a video signal back into the other consoles which seems bad. i thought about using transistors and a picaxe or something but an option that only requires a switch would be much more pleasant. what would be the best option and where can i buy a switch with that many poles and throws or where can i buy transistors that will handle frequency of the video and audio signal?
Asked by Deshmal 5 years ago | last reply 5 years ago
Looking to build an 'audio switch' for my devices on my network or have a circuit board to have on my desk. I have 5 computers (windows/mac/linux) I run at any given time, some used for Skype, Youtube, Music, and/or Gaming. I am looking to make something that I can connect up with 3.5mm sound and mic jacks to a main board and controlling the input and output to different speakers and headsets all on 3.5mm. Ideally I'd like to have volume control on the board itself, but isn't required. Does anyone know of a instrucable already made?
Posted by AlexR32 3 years ago | last reply 3 years ago
Hello! I recently purchased two XBee Series 2 modules for a personal project. I did everything I wanted with the arduino connected directly to the sensor but I want to try remote signal processing. I want to connect an analog sensor (or digital) to one of the XBee's pins and with the other Xbee connected to an Arduino , where I want to process data from the sensor. All the examples found on the net are made with XBee Series 1 but I hope someone still managed and XBee Series 2. I would be interested configuration made with x-ctu or terminal. Thank you!
Posted by didrau 4 years ago | last reply 2 years ago
Hi there, I am working on a personal project and would like to find a capacitive touch input device which is roughly 5x30cm in size and will give me a x,y value for one or two fingers. The resolution does not need to be brilliant - 7 bit range in the x direction and maybe 5 bit in the y direction would be fine. Serial interface which I can use with my Arduino. I would also like to get a "pressure" for each - I know this is asking a lot but the "pressure" can roughly be guessed at not by actual pressure but by perhaps an increased/decreased capacitance or the amount of the surface being covered. I only need this to determine which of the two finger inputs is pressing hardest so again it doesn't need to be precise. Would anybody know of such a device? I mean - there must be companies producing these, I'd not want to go and have a custom one made for price considerations but surely there is something vaguely close. I have looked into the possibility of making one for myself but it appears I would struggle to do something this complex with my Arduino alone and the only IC which will do this with a homemade panel (not that I have the ability to create a capacitive panel with this many pads) seems to be QProx QT1081 which only accepts 8 inputs. Any pointers or ideas would be very gratefully received :) Cheers, Adam
Posted by Adam_D 8 years ago | last reply 8 years ago
Asked by s117 8 years ago | last reply 8 years ago
Hi ! I have this program, Finale 2005b. I've searched everywhere, and I cannot find any way to export the music I produce in there as a real audio file (NOT a midi). So, to achieve this, I have decided to record the output as the input... using Audacity , actually. To do so, I used a simple mono cable to go from my headphone to mic plugs, and set the volume to the minimum... to avoid too much amplitude going in. Now, for the use I want it, this method is way too dodgy (plenty of interference, specially each time I move the cable 1 mm...) I'm pretty sure there is some program or solution to directly map the stream around... I don't have much funds, so free would be good, and btw I work on Win32. Thanks
Posted by fxsapa 10 years ago | last reply 10 years ago
I plan to do a project that will use 28 arcade style pushbuttons to activate 28 different sounds on a computer. Any ideas on products out there I can use to connect all 28 buttons to a computer, preferably with a USB cable, so it can be used in a programming language such as C++? One idea I had was to take apart a QWERTY keyboard, but I still want to be able to use my regular keyboard to use my computer. Alternatively, is there a way for two keyboards to be connected to same computer, but one of them only activates a specific program? i.e. trying to type in notepad with it wouldn't work?
Posted by Swordmasterb 5 years ago | last reply 5 years ago
Hi there instructables, recently I have bought a picaxe starter kit, soldered it and stuff, played with some code and leds, but now I want to make a time control, so I bought a cheepo alarm clock, desolder the piezo beeper and extended the wires so I can conect them to my picaxe, turns out its too sensitive, the pin I've set to input piks up heat fom my fingers about a centimeter away, breath too, I think it picks up grounding as a signal too, does it ment to be that sensitive or have I messed something up with soldering or the code? heres the code I used main: if pinc.4 = 1 then goto led goto main led: high c.1 pause 500 low c.1 pause 100 goto main
Posted by batonas 4 years ago | last reply 4 years ago
How to make USB Female socket for Nippon NS68LO music system which is OEM with Suzuki Cars and do not have a USB port although the system has a facility to connect USB drive through a round 8/9 pin socket at its rear.. I have seen some good uses of USB here and hence thought of asking if you could help me out.. Warm Regards, Rahul, India.
Asked by rkorde 7 years ago | last reply 5 years ago
1. What Operating system the device you are using, if its a computer, that would be linux, windows or mac (or freebsd etc) for mobile it would be android, iOS, windows mobile. Please also include the version number. Ubuntu Mate 17.04 and Windows 7, all operating systems 2. Browser information including version number, if you're using the mobile app include app version number Linux Chrome Version 58.0.3029.81 (64-bit) 3. Include what project or url you were looking at when the error occurred https://www.instructables.com/id/Raspberry-Pi-Garage-Door-Opener-with-streaming-vid/ 4. Screen shots of what happened if available After saving only middle 4 lines are saved. AuthType Basic AuthName "Restricted Content" AuthUserFile /etc/apache2/.htpasswd Require valid-user 5. steps to reproduce, this will be one of the most important pieces of information as it will enable us to do the same thing and find a fix. See number 4
Posted by pber 1 year ago | last reply 1 year ago
I'm filling a box with multiple different speakers I have salvaged from different items. I would like to wire these speakers in some kind of sequence. Basically, I would wire one to the source, and then I would wire the next speaker to the speaker that's already been wired, using the solder to connect. Would this work correctly? Also, I have a volume switch that uses A/V connections. The problem is that it has three inputs but only one output. I would basically like to reverse this. Is it possible?
Asked by metalshiflet 4 years ago | last reply 4 years ago
Hi After moving i unearthed my old, but very big screened, portable dvd player. It used a Li-Po battery which is lost and has been flat for 4-6 years, so its unlikely to work anymore, and even so, i no longer need it. What i do now need is an LCD reverse parking monitor. I have everything but an LCD with RCA inputs, so i figure, why not repurpose my DVD player. I need to know, how would i go about locating the correct area in the circuit to connect the RCA input? I know how to follow tracks, im just not sure what it is im looking for, My first thought was, follow the RCA outputs, and hope that at some point it leads to where the DVD player is producing the RCA that goes both to the output jack, and also to another processor/ encoder/ decoder which then feeds the data stream to the LCD, and all i need to do is sever the original RCA track and use my own, however before i do anything, i want a second opinion, as well as also finding out if my logic is sound. If infact the datastream from the dvd reader is being turned into a decoded datastream for the LCD in the same place that also creates the RCA output, then this wont work, as there is nowhere to put the inputs. In this case, how would i go about getting my video output to display on the LCD? how would i go about locating a decoder and conecting it up and ect, just video anyway, for the time being i dont need audio, also the audio track is easy enough to manually hijack anyway. This is a situation where i would rather spend an excessive amount of effort in getting it to work rather than buying a display. Thanks
Asked by oldmanbeefjerky 6 years ago | last reply 6 years ago
Well I want to make a stereo Vu meter for my computer. https://www.instructables.com/id/SOCKO0TFI36FRXJ/ I want it to be stereo but dont know how to do that. Im planning to cut a headphone to get the audio jack and thats stereo so how will that go into the scematic. (excuse the spelling its late)
Asked by sunny342 9 years ago
I have a project in mind. I have children with a pet cat. I intend to build a charcoal filtering for a catbox/cat tree I am building. I want to use an alarm clock (easy to adjust time if needed) to activate maybe a buzzer and flashing light daily for box cleaning. The fan runs at a low speed constantly at the top of a vent tube to keep the smell controlled. I want an input to reset the buzzer/flashing light when the drawer with the litter box is opened. I have no idea how to build the circuit. I tested the filter system on a mockup box. It works fine cat doesn't notice the fan. (its 3ft up a 3" piece of PVC). The lack of smell is the reason I'll need a reminder. I could purchase an industrial programmable relay but cost is a huge factor and buying an added power supply etc for control voltage adds up. I have an industrial electrical background and no problem working with small circuitry but have never designed anything so hints and help will be appreciated.
Posted by alienmemebr 6 years ago | last reply 6 years ago
I'm making an informational website for my Web design class using Adobe Dreamweaver. He wants it to be informational, so I figured it would be easy just to move my instructable to the site and format it a bit rather than start from scratch. I tried copying the source code, no go since the pictures aren't stored "locally" Right now I'm in the process of copying and pasting the text, but there has to be an easier way (this is a 30 step instructable) Do you know how to port an instructable to another site, while keeping all of the images and text local to a flash drive? I'd like to preserve the notes option as well. I can't use the flash insert that the site has made, because it's too small and doesn't work right for my use. Any ideas?
Posted by lukethebook333 8 years ago | last reply 8 years ago