ESPixel Stick Q&A

Hi all.....I bought an ESPiex Stick....And I know what it does, but does not come with a users manual. Does anyone know how to set it up? I am a newbie to this kind of tech but learn quickly. Any help or tips would be really appreciated. There are many youtube videos showing what these are and some define what they are. I don't know how to attach one of them to this site. But if you type ESPixel Stick in Youtube you will easily access everything......Thanks,,,,,,~~RoB~~

Topic by roborizino 1 year ago

DIY Mini Drill Machine

Hi everybody! I have bought a mini drill chuck from But unfortunately it's hole is smalle than my DC motor. i don't even know the motor I have is 12v or 6v but i have ran this motor on 12v but i didnt burnt. its tip is bigger than my drill chuck. Any ideas how I can fix this?

Topic by NajabatK 1 year ago  |  last reply 1 year ago

Boombox Bluetooth mods

I have a JVC RV-NB1 Kaboom Series Boombox and want to mod it with a "Decoder Board USB/TF/ Reader IR Remote Bluetooth/FM Audio Board Module MP3". "Bluetoothing" this box is easy but installing this module involves a bit more ie. usb, TF slot, aux, FM. IR for remote any ideas as to connecting the rest. I can't seem to find a schematic from JVC. It has an FM tuner and can decode mp3,WAV,CDA,FLAC. CD's.Plus I want to add either a LiPo 4200mAh battery or a transformer for charging the module.any ideas would be greatly appreciated. Chuck Reed

Topic by CR34 1 year ago

how to save float value EEPROM

Hi This is Eabul. i want to save data to eeprom from press button . when TemperatureUp button press. increase float data like as 0.01> 0.02--------30.10> 30.61 and this value save to eeprom. and when TemperatureDown button press . decrease float data like as 30.60>30.59-----29.10 and update minus value eeprom and increase and decrease valud view lcd display . but when press button save int number not float. and show me lcd display int value. please help how to write and read float value from eeprom. press button. hear my code. //For Display #include // 3wire display LiquidCrystal595 lcd(4, 3, 2); // DS, ST_CP, SH_CP //For time #include #include RTC_DS1307 RTC; //for humidity #include "DHT.h" DHT dht; //for stor tempereratur and humidity #include int SetHumidity; int HumidityUp = 10; // switch up is at pin 10 int HumidityDown = 11; // switch down is at pin 11 float fix = 0.01; float settemp; // make a variable called temp float TemperatureUp = 12; // switch up is at pin 12 float TemperatureDown = 13; // switch down is at pin 13 //result view int led = 0; // led is at pin 0 void setup() { //For timer Wire.begin(); RTC.begin(); //For welcome screen lcd.begin(16,4); lcd.setCursor(0,0); lcd.print("Welcome Elab"); delay(2000); lcd.clear(); //for dht-11 pin setup dht.setup(A1); // data pin 2 } void loop() { //For tempererature up / down float temp[3]; getTemp(temp); float tempererature = temp[1]; settemp =; // read the settemp on the eeprom if(digitalRead(TemperatureUp) == 1 ) { settemp+=fix; settemp++; EEPROM.write (1, settemp); /* write the most recent settemp in eeprom data stoage*/ } else {} if(digitalRead (TemperatureDown) == 1) { settemp -= fix; settemp--; EEPROM.write (1, settemp); /* write the most recent settemp in eeprom data stoage*/ } if (tempererature >= settemp) { digitalWrite (led, 1); } else { digitalWrite (led, 0);} //else { }; lcd.setCursor(0,0); lcd.print("T:"); lcd.print(tempererature); lcd.setCursor(8,0); lcd.print ("ST"); lcd.print (settemp); lcd.print((char)223); //End tempererature controll //For humidity up / down SetHumidity =; int humidity = dht.getHumidity(); if(digitalRead(HumidityUp ) == 0 ) {SetHumidity++ ; } // add one to the settemp else {} if(digitalRead (HumidityDown) == 0) { SetHumidity--; } // Reduse settemp else { }; lcd.setCursor (0, 1); lcd.print ("CH:"); lcd.print (humidity); lcd.print ("%"); lcd.setCursor (8, 1); lcd.print ("SH:"); lcd.print (SetHumidity); lcd.print ("%"); delay (1); // wait 100 milliseconds EEPROM.write (2, SetHumidity); /* write the most recent settemp in eeprom data stoage*/ //End tempererature controll controll } //analog temperature void getTemp(float * t) { const int analogPin = 0; // replace 0 with analog pin const float invBeta = 1.00 / 3380.00; // replace "Beta" with beta of thermistor const float adcMax = 1023.00; const float invT0 = 1.00 / 298.15; // room temp in Kelvin int adcVal, i, numSamples = 5; float K, C, F; adcVal = 0; for (i = 0; i < numSamples; i++) { adcVal = adcVal + analogRead(analogPin); delay(100); } adcVal = adcVal/5; K = 1.00 / (invT0 + invBeta*(log ( adcMax / (float) adcVal - 1.00))); C = K - 273.15; // convert to Celsius F = ((9.0*C)/5.00) + 32.00; // convert to Fahrenheit t[0] = K; t[1] = C; t[2] = F; return; }

Topic by esumon 1 year ago  |  last reply 1 year ago

premium membership

How long to activate after purchase?

Topic by wmasi 1 year ago  |  last reply 1 year ago

Reset password not working

I recently received a temp password for my account, and now that I am logged in and trying to change it to a new one of my own, I am running into a problem. When I enter the temp pass in the 'old password' window one, I get an error message saying "wrong password" I know the temp passes are often limited in functionality to a short time window, so am hoping for a rapid reply & help on this problem.  Mary

Topic by MaryLenehan 6 years ago  |  last reply 1 year ago

Cree XL-M RGBW LED - recommended LED driver?

Hello I live in Australia and am new to the electronics world. I recently obtained a Cree XM-L RGBW LED 20mm 12W (image). I want to wire it up, so decided to browse the internet for wiring information. This has resulted in a multitude of questions and I haven't been able to find any answers.  From what I can gather, each LED runs @ 100% ~350 mA, up to a maximum of 1 A. Doing some research, it seems I should use an LED driver to ensure that a consistent voltage is maintained. I have some LM317T MOSFET/Voltage regulators coming in, but after some further reading, they can be inefficient. I read I can use an Arduino for PWM to help set different colours by varying the brightness of each LED. Can the Arduino also be used as a driver? Looking for a driver is where I'm stumped. I'm assuming I need a driver per LED. Does this mean I need 4 separate drivers or are 4 channel drivers available? I've seen some single-chip IC drivers and some larger (multiple component) drivers, which should I be looking for? I would have thought that drivers for this type of multiple LED would be easily found, but I'm stuck :) Maybe I'm searching for the wrong thing? I emailed Cree, but they simply gave me an email address for an Australian LED company that no longer exists (at least the domain is no longer active). So I thought the next best bet would be reaching out to users who may have dealt with these LEDs. Thanks!

Topic by hendrikse.alex 1 year ago  |  last reply 1 year ago

Roomba and Central Vac

I really don't like cleaning my house but I don't want to live in a garbage house.  I'd like to have a floor cleaning system.  For carpeted areas, I envision the that the system would use a Roomba and dock to a central vac system so that I wouldn't have to empty the Roomba.  For the non-carpeted areas, I'd like to use a Scooba that connects to water and sewer.  What are your thoughts?

Topic by sundet 7 years ago  |  last reply 1 year ago

sidecar wheel position

I've looked up sidecars on google and found lots of information for sidecars on vehicles that have front steering only in which case the sidecar wheel tends to be positioned parallel to somewhere between the midpoint and the rear of the vehicle, however if the vehicle has both front and rear steering would the sidecar wheel be best positioned parallel to the exact midpoint or not?

Topic by ambientvoid 1 year ago  |  last reply 1 year ago

How to make a calculator that divides by zero?

Hi New to the forum so not sure how it works here but basically asking a request for a instructable for any shop brought calculator that when asked to divide something by zero returns a number, maybe a  random number, but hopefully 42 everytime. Is this possible and if so could someone post the instructable? Cheers

Topic by blind oly 1 year ago  |  last reply 1 year ago

Awful back-of-the-magazine tat

Somehow, I stumbled across this bloody-terrible piece of cack on the internet: Flying Scotsman-Memories of Steam Cuckoo Clock And remembering the: Elvis Presley Dambusters Clock Plate of Tutankhamun I could not honestly tell which was real, and which was a "piss-take". There are more... what did you see in the back of that thing you looked at printed on cheap-paper?

Topic by lemonie 8 years ago  |  last reply 1 year ago

Shenanigans! - your &quot;premium membership&quot; and PDFs

I was browsing an article to get the full article PDF download. I was not logged in at the time since you can still browse the site without logging in (for how much longer I don't know).I was shocked to read in a tool tip that "a benefit of the premium membership is the ability to download and print the PDF for $4.95 per year" Outraged at reading this, I logged in only to make a complaint. When in the course of confirming the price for the comment I noticed I had access to the PDF. Now if I were a new user and looking into collecting as much article information as possible, and saw this tool tip I would sign up for the premium member to get the PDF. Even though I don't need to. Please correct the text of that tool tip to not mislead what few users you may still have.

Topic by boter2099 10 years ago  |  last reply 1 year ago


Https:// I have successfully made a 24 * 9 led matrix following the instructions on above link, which when I use with an arduino from a serial monitor I am able to display a scrolling text. However l want when one types a text and or numbers -maximum seven, they should be displayed permanently or stationary except of course if one decides to change the text and send again from the serial monitor. Kindly can someone send a full code for the task. I suppose you will change and update the code from the above link. My email address is :

Topic by NJORO1975 1 year ago  |  last reply 1 year ago

***FS: Disney Pirates of The Carribean Davy Jones Mask customized and airbrushed***

I have for sale a limited edition officially licensed Disney Davy Jones Mask that has been customized with foam and latex on the tentacles to be 3D and more realistic just like the movie version. This mask also has been custom airbrushed again to be closer in reproduction to the movie version. Please see pictures! This is already an extremely rare piece and the fact that its been customized....this is a true 1 of a kind, only one in production like this! Paypal FF accepted $85 shipped anywhere in the continental US Thanks for looking Jeff

Topic by xtremevette 1 year ago  |  last reply 1 year ago

How to make xy plotter controlled via computer serial port

Is it possible to make a XY plotter which would be controlled by a computer serial port instead of a dedicated processor as everybody someway or the other just do that no matter what version it is

Topic by Unumunu 1 year ago  |  last reply 1 year ago

Where to find large sheets of cardboard

I know back a few years ago you could get huge sheets of cardboard from Home Depot and it was some great stuff, but now they dont do it. Does anyone know where to find large sheets of honey com or 3 ply cardboard these days? Or any 4' x 8' sheets. Thanks, Ethan.

Topic by mindstormmaster1 9 years ago  |  last reply 1 year ago

Ornament Patch Giveaway: Trees!

UPDATE: Giveaway is closed! You can't have ornaments without trees! So to go along with all these ornaments we want to see some trees in the comments. So... If you want a patch, post a new comment with a picture of a tree. Check out my first comment below for an example. Never added an image to a comment before? At the bottom of the comment box, click "add image," then click "Choose Files." Pick your image and click "Upload" Don't do the Christmas tree thing? It can be any tree. Giveaway ends at 1pm PST! Get it in by then to get a patch.

Topic by fungus amungus 9 years ago  |  last reply 1 year ago

Constructing a realistic lasergame

I am making a laser game/tag system and I would like an IR detector/sensor that can tell the difference between a direct hit and a near hit fly by so that the "bullets"can still cause sounds on a near hit. The sensor should be as invisible as possible but should have a very clear and acurate detection. If there is no way I can make it work I will tweak the guns to be louder. Guns will have to hit over atleast 200 meters "For snipers". I know I need a double-convex lens but I just don't know wich LED I need. It would also help if next to a focused LED there is a way to send an infrared signal in all directions for just a while "For explosives". I have looked at ad hoc but no idea if it would work in there. For the suits I will most likely use sensors connected to a micro-controller/processor. Oh I forgot to mention that I am not using infrared lasers because they will most likely burn or damage the equipment.

Topic by xpalix 3 years ago  |  last reply 1 year ago

Need help with power supplies

I've been reading about electronics for a while and watching the Make podcast and I've finally started making my own projects. Anyway I have some cordless tools with 3 extra batteries but only one of them still takes a charge. So I thought it would be cool if I could put a power supply in one of my dead batteries so that I could plug it into the wall. I've been looking around my garage and thrift stores for a wall wart that would get the job done (the batteries are 19.2V Craftsman batteries I think they pull about 2000ma) but the closest I've been able to find is an old laptop power cord has a DC output of 19v and 3.9amps. So I'm not sure if that will work or if the extra amps will burn out my tools or something. Does anyone know if it would work? If not how can I dial down the amps?

Topic by cannedham160 10 years ago  |  last reply 1 year ago

Free altoids tins


Topic by Cpl.Ellis 6 years ago  |  last reply 1 year ago


My PC's splash screen shows the shop name from where I bought my PC. How can i Remove this? I attached screen shot to make it easy to understand my question. Please Help…

Topic by Shezi007 1 year ago  |  last reply 1 year ago

Upcoming Contest List Page Bug?

When I click the link to view upcoming contests, the page doesn't load. Is this just a "me" problem or are others experiencing this as well? 

Topic by Not_Tasha 1 year ago  |  last reply 1 year ago

Short range battery operated 2 part (door alarm type) distance sensor.

Hello all! I'm looking to design a range compact distance sensor that will sense 1-4 ft increments. If necessary i could modify a door alarm. id like to fab one or multiple if need be to sense the distances noted. I could utilize a buzzer or some way to record a voice that would alert to said distance. The battery voltage max is 4.2v dc and if it could be rechargeable that would be a plus. Any help on this would be greatly appreciated. Thanks!

Topic by Automan350 1 year ago  |  last reply 1 year ago


Hi, I have set everything on "Weekly", but I'm receiving emails every day.

Topic by humanoidvani 1 year ago  |  last reply 1 year ago

Wanted: Package Dropbox Monitor

We recently purchased an ElephantTrunk secure package drop-box.  We do not know when a package has been added to it. Could someone make either Weight sensor to tell us a package is in the box Sensor to tell us when the door was opened If possible to send a text to our phones to let us know.

Topic by DanniRedd 1 year ago  |  last reply 1 year ago

Electric Motorcycle batteries

Hi, I have an electric e-motorcycle (Road Runner -several years old) and I need to get new batteries ASAP. Inside it has 2 rechargeable batteries. Does that mean I need to get 2 - 12V batteries, whatever Watts I like, based on however much horsepower I need.

Topic by MielV 1 year ago  |  last reply 1 year ago

WiFi Radio / MP3 Player with ESP8266

Hello everyone, I'd like to make a new project: Reading in an usb stick with .mp3 files, and playing them. Moreover to swtich from mp3 playing to a wifi radio station. Basically I'd like to use a nodemcu ESP8266 for this project. This was my idea (s. Attachment) My questions: Does it work? Is the controller of the ESP8266 powerful enought to fit these requirements? Do you have improvements for this project? Best regards, Julian

Topic by julianpe 1 year ago  |  last reply 1 year ago

Industrial battery charger

Why the correct maintenance of batteries is essential to warn his exhaustion and to know when to replace it. With proper maintenance,can we avoid the battery failure? Im asking about battery chargers, Digital battery chargers, automatic battery chargers, traction battery chargers, Amperis battery rectifiers, battery charger rectifier! Thank you so much

Topic by GuGaC1 1 year ago  |  last reply 1 year ago

Battery Powered Programmable LED Sign

Hi all! I am working on building a sign to hold up at a concert I'm going to in a couple months, and I really want it to stand out!  To preface: I am very technically inclined but know very little about powering LEDs (have only done basic diode and battery combos) and have zero programming experience, but am a quick study.  What I am looking for is a solution that can be mounted on a 20x30" corrugated plastic panel, and run via battery pack with enough juice to last a 4+ hour concert. I know that one can easily buy battery powered LED strips, which I'd mount in an array on the plastic, but I'd really like to ideally be able to control the lights colors and show different bits of text, possibly via an iOS app.  I know this might sound quite ambitious but as my dad always likes to say, go big or go home! Anyone have any ideas where I can get started? Thanks in advance :) 

Topic by bitterfame 1 year ago  |  last reply 1 year ago

Click on instructable in email, go to instructable cannot download

This is a new one.  I get an email with a Topic of Interest and click on it.   I get to instructables, Normally I would be logged in  from my home PC.  Not happening. ​On any PC and any operating system try this:  Go to an email that has the URL for any project.  Result:  You will not get logged in to your account I log into instructables in a new tab on my browser. I copy-paste the name of the instructable in the Search window. The Topic of Interest comes up along with dozens of similar instructables. I choose the instructable I want and get a new window. My login does not carry to the new tab like it used to. This means I cannot download even though I have premium membership This means I cannot click on anything that is associated with my login. To save us both time and save you from asking me questions that you do not need to ask me. Please ​Try this:  ​Go to your instructable login page Search for an instructable.  For example, "Making PCBs at Home." You will get a page full of all kinds of projects related to PCBs. Choose "Making PCBs at Home".  Click on it. You will get a new window without being logged in. You will not be able to download it, nor will you be able to access a login window, nor will you  be able to do anything that is associated with your login This is a web coding problem and has nothing to do with operating system or PC. What happened?   Please fix it.

Topic by stannickel 1 year ago  |  last reply 1 year ago


Hello everyone!  I currently have a project in development which is lacking only one step. I am making a DIY Electric skateboard powered by a Arduino UNO board. I have some leds in the back working fine, the esc and motor work when I adjust the delay to 1300 miliseconds.. But my problem is to control the esc and motor via de potenciometer. Right now my potenciometer only reads me the values from 0-1023 but nothing happens. I have a map in my code but nothing is moving when using the potentiometer. Can someone help me out to make the potenciometer work? Here is the link to the instructables page where I have all the materials I used and also the code! Thanks in advance!!

Topic by MauroGB 1 year ago  |  last reply 1 year ago

Hall effect sensor to trigger relay

Hi! I have a project that needs to sense whether water is flowing through a pipe. I bought a water flow sensor on Amazon ( thinking I could use it as a basic switch, however, it's got a hall effect sensor and I don't understand how to deal with the voltage output. Measuring from the pulse signal to ground, the sensor swaps the polarity each time it's triggered: With water running, I see a positive voltage. Turn the water off and back on, voltage goes negative. My control system can't deal with this. What I need is a simple circuit to turn the sensor's pulse output into a contact closure. Can anyone help? Thank you!

Topic by rpdubz 1 year ago  |  last reply 1 year ago

Recover previous work

Hi, First time using instructables. I was finishing a tutorial and found out that I wouldn't be able to finish it that time so I closed it to finish the other day. When I came back I found out that it is not saved anywhere. Is it possible to recover it or do I have to do everything again?

Topic by vitor_vs 1 year ago  |  last reply 1 year ago

any one provide me complete code and docs to post temperature on to thing speak using lm35, arduino uno and esp8266

Any one pls male me project on posting sensor data on to thing speak

Topic by iottrainingacpl 1 year ago

Sound Locator Circuit?

Hey all, Here's an idea maybe one of you solder-jockeys can help me out with: Ever have a sound that you'd like to find the source of, but your ears can't tell you where it's coming from?  I'd like to build a circuit to do that. I was thinking of something like three electret microphones with op-amps between them in differential mode.  That would give three signals that would be, presumably, the ratio of sound coming from each mic.  (And, therefore, an indication of direction.) Of course, I'd also like to get an adjustable bandpass filter in there somewhere to isolate just the sound I'm looking for.  That's the part that complicates all designs I've thought of. And then, if I could somehow figure out distance too, that would be the ULTIMATE! Here's one possible use case: A car makes a funny squeal noise a highway speeds. The mechanic takes out this device and magnets it inside the hood.  He runs a control wire back to the cabin. Once the car is in motion and making the desire noise, he adjusts the BP filter using potentiometer(s) and a pair of headphones. The device tells him where (relative to itsself) the sound is coming from. Your bill is less because the problem was diagnosed quickly without a lot of guesswork. Thoughts?

Topic by PS118 1 year ago  |  last reply 1 year ago

E coli incubator

I am building an incubator for ecoli.  Any comments or improvements?

Topic by drystreams 1 year ago  |  last reply 1 year ago

4 wire touchscreen

Hello, I'm currently trying to use a touchscreen that has 4 wires but 8 pins. I have a connector with 8 outputs, but I read some topics about touchscreens and everybody uses just 4 of them. So, right now, I'm using just 4 pins (It works with some noises) and my question is: If I use the 8 pins it will be better? If yes, how to connect them? Here is the touchscreen model: I'm putting the screen configuration as an attachment.

Topic by maomevoador 1 year ago  |  last reply 1 year ago

Liquid dispenser wireless pour control

Hi guys, anyone knows the concept behind this It is a wireless drink pourer, that can control the liquid flow. Can't find if something like this can be made with Arduino. Does some one have an idea if this can be done?

Topic by justforcavaliers 1 year ago  |  last reply 1 year ago

Technical pens how long do they last?

I have some old technical pens I think more the 20 years old. The kind that you refill and take apart when you need to clean them. I was wondering if any one knows if its time to throw them in the trash? They are Staedtler Mars Matic ink pens. They came in 3 classic standard sizes in a plastic case. I did know how to clean them nicely but haven't used them in a while. So when I did go to use them it made a mess. So I cleaned them again and it didn't improve anything.  I was wondering if the plastic distorts after awhile? So what do you think? Thank you for your answer.  :)

Topic by Treasure Tabby 1 year ago  |  last reply 1 year ago

HEMI no programing required !

Hello  I am interested in build a simple mini line following robot  like HEMI dome shape design, has any one here built this robot ! or ones like it, and information on where to get parts mini or micro gear box, and motor and mini wheels to fit as well as mini circuit boards or I will make one via you tube . . Thanks any help appreciated  David  

Topic by beginner 1 1 year ago  |  last reply 1 year ago

Wi-fi enabled window shutters

I want to automate (4)  sets of window shutters (called Plantation shutters.). I have the mechanical parts worked out which I plan to power with a servo motor on each.  Can someone help me work this out? I am somewhat handicapped now and have difficulty getting around from room to room.  There are a total of (22) actual shutters, but I will have the shutters on each window linked together with a rod powered by a positioning servo...four windows...four servos.  The operation can be simultaneous.  I do not need to operate them separately. Thank you for any help you can give.

Topic by hrp1937 1 year ago

What about adding status post here?

I would like to suggest a post status here just like facebook. I would love to post my update on what's on my workbench or what I am currently cooking or what so ever. What do you think? Please let me know in the comment thanks!

Topic by WarenGonzaga 1 year ago  |  last reply 1 year ago

finding a best way of design solution

Hi. am finding a best solution for my design. look at drawing. there is 4 bars. about 2~3cm long each. their tip is holden on something in middle. when you pull up right black bar, right gold one will pulled down. "in same degree." when you pull down left gold bar, left black one will pulled up. "in same degree." likewise when you pull up two black bar, two gold bars will pulled down. "in same degree." its not just a normal hinge cause their move will interactive.15 degree up - 15 degree down. what can be a best (simple, durable, hard) solution?

Topic by Sung-hyeonY 1 year ago  |  last reply 1 year ago

Desk-turned-School Bag from waste cardboard box

Hello, I am working with one of the NGO in India which is working for the education of underprivileged kids in the slums.I want to make school bag-turned-writing desk for the children since they cannot afford to buy a school bag.Can anyone please help me in this please ?? 

Topic by abhijeet1 1 year ago  |  last reply 1 year ago

Corner Headboard

Hi, I am looking for idea for a corner headboard. I am new to woodworking and need something simple. Any ideas would be appreciated.  Thanks Chris

Topic by ChrisB763 1 year ago  |  last reply 1 year ago

Project issue

Whenever I have Microsoft Project open to read mpp document, it brings the whole system operation to a crawl. Forget about using a browser whenever that program is open; it slows everything down. Any suggestions as to what causes this?

Topic by Ross0298 1 year ago  |  last reply 1 year ago

3.5mm 5.1 Surround Sound Switch/Splitter Box for 2 inputs

Hello, my first post here, so it might be in the wrong section, please move it if necessary. I have quite a complicated problem. Currently I have 1 PC with 5.1 speakers and recently bought a 5.1 headset with microphone. Already  I have a problem when I want to switch between speakers and headphones, each time I have to go under the desk and change the cables :/ In a few months I plan to buy another computer (old one is used up, but it is still quite good equipment). And here begins the stairs. I do not need a second monitor or keyboard plus a mouse, so I want to buy a KVM (keyboard / video/ mouse) switch. The mouse and keyboard are USB ones, so the KVM must support USB. Monitor and graphics card are connected through DVI, which I want to keep, so I must have a DVI KVM. I also want to be able to switch between headphones and speakers. So I thought about this: cs1782 But this works only for one 'source': I could use either speakers or headphones, switching from one PC. But I would like to be able to choose whether I want to use speakers or headphones on both of the PC, so I was thinking about doing (I have not found anything like this to buy, which is strange, because more and more people have the same problem) something like this. But as to be able to do: - Switch between headphones and speakers at PC1 - Switch between headphones and speakers at PC2 - Switch between PC1 and PC2 - Using headphones on PC1 and speakers on PC2 (or vice versa) simultaneously. I've came out with this picture, which should  be able to do this: - Switch between headphones and speakers at PC1 - Switch between headphones and speakers at PC2 - Switch between PC1 and PC2 But I still can't figure how to make this: - Using headphones on PC1 and speakers on PC2 (or vice versa) simultaneously. The more I  think about it, the more I get the idea that it can't be done via DPDT switches, but I don't know what to use. Is it even doable? I have no experience in electronics (I did solder couple of wires in my life, but nothing more), but I have a lot of enthusiasm, so I could make such magic boxes, if I knew how. Thanks in advance for any suggestions, ideas, etc. I also hope that this problem will be useful to someone else.

Topic by ratm4n 9 years ago  |  last reply 1 year ago

Shock alarm clock

Hi,  I want to build a Alarm that will shock you when the clock hits a certain time i am new to this could someone help me out ?!

Topic by josephwilmott2 1 year ago  |  last reply 1 year ago

How to make 12V 2 switch touch panel for car?

Hi guys, I am looking to make a 2 button switch panel for car. I'd like to have capacitive buttons rather than ordinary switches if possible. Something similar to this but smaller and only 2 buttons 1 button needs to be momentary as this is an external power button wired into tablet. 1 button needs to be latching (press for on, press again for off) this controls the accessory power (amp/usb hub etc linked to this) I would like to have them backlit and behind some acrylic so you can just see the light but activate the switch. The capacitive touch buttons I have seen so far all seem to be under 5v and I'll need to work with 12v since it will be inside car. Any help on this would be greatly appreciated 

Topic by alexmallaburn 1 year ago  |  last reply 1 year ago


Do you know how to make a analog tv antenna?

Topic by gunnarG1 1 year ago  |  last reply 1 year ago