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Topics


ARDUINO

Hello, I have these products (High Speed Closed Loop Stepper Motor + HBS57 Stepper Driver) and i think i will need arduino panel (i dont know how they call it).Can you help me ?

Topic by TheDevilOfHeaven  


Support contact problems

Hi, Is anyone else experiencing problems contacting the Instructables support team via email? I have tried to email them via different channels three times now but it comes back as non-existent email address.... ironically the reason I'm trying to email support in the first place is because despite changing my contact to a new email address in my personal settings, emails are still being sent to my old email address. If anyone knows how to get through to support or if they are having the same issue maybe we can join forces to resolve it..? Cheers!

Topic by PabloDee    |  last reply


'Can I connect 2 TPA3118 60w Mono Module to create a Stereo Amplifier?'

This is the only amplifier I had lying around and since it was a mono amplifier, it only accepts 2 inputs. By using two boards at the same time feeding the same signal wherein the LEFT channel and GND goes to the 1st board and the RIGHT channel and same GND to the second board will it work smoothly as a stereo amplifier creating a 120w Amplifier? ~(Also, I'm using only 1 power supply to power the two boards.)

Topic by Chloe_Lemaire    |  last reply


Atx power supply Answered

20pi old atx power supply whith foppy drive connection and reg.hard dive and ribon connections no switches for power 1 plug for ac 1 led green 1 120/220 switch led on when plugs in but no out put power I cross green and black wires led gos out still no out put help please

Question by paulrockwell11141119    |  last reply


Safe charging current for LIR1620?

Hey all. I'm wondering what is a safe charging current for the LIR1620 rechargeable coin cell battery? I found an instructable on here for modifying a 1A charger to 35mA (but it requires VERY small soldering). A store-bought charger specifically for coin cells is 40mA. And some super cheap ones from China are 50mA. Are all these safe, or is 40 or 50mA too much? Thanks!

Question by aliasjanedoe    |  last reply


Having trouble measuring voltage with arduino.

I have posted this question before but I’ve made a few changes with my circuit with no luck. I’m trying to make a variable lab bench power supply with an lcd screen to read voltage and current while adjusting them. I’m using TL431 to have a 2.5v Vref and  a op amp in voltage follower configuration with 10M and 1M trimmer (Divider) on the input to finely calibrate 38v down to 2.5. The op amp is acting like a buffer. This is the code I've come up with: float volt; int sum = 0;                   unsigned char sample_count = 0; #define NUM_SAMPLES 10 void setup() {   analogReference(EXTERNAL);   Serial.begin(9600); } void loop() {   while (sample_count < NUM_SAMPLES) {    sum += analogRead(A0);    sample_count++;    delay(10);     }    volt = ((float)sum / (float)NUM_SAMPLES * 2.5) / 1023.0;     Serial.println(volt * 15.2 ,3);     sample_count = 0;     sum = 0; } Parts list: LM358 (for now, will upgrade to a unity gain stable op amp) 10M 5% resistor 1M trimmer Arduino Mega (Will use a pro mini in the final circuit) Breadboard (Will this effect my readings?) TL431 (2.5v Vref) Yes I now the LM358 is not suited for this application but I don’t think this will affect my readings by much, about 5% maybe. Will it? This code is gives me OK values at start but when I start to decrease/Increase the voltage. It lags behind and offsets by 1-2 volts on the reading. My goal with this project is to read (LIVE, meaning while changing voltage with buttons and see it change without any offset/lag) Voltage with a resolution of +-5/10mv accuracy and also read current (But thats for a later day). One last thing, I’m 16 so a lot of electronic terms tend to go over my head so please while giving an answer keep it simple if possible. Thanks :D

Question by faraz ahmed khan    |  last reply


Swapping out a lead acid electric bike battery for a Lithium Ion one.

Hi folks. I have a fairly old but still quite serviceable Thompson Euro Classic electric bike that runs on a 36v lead acid electric battery pack with a brushless motor. I've just been offered a 36v lithium ion bike battery that I would love to use but I'm not too sure if it would be the right choice, my main reason for the change is simply weight consideration, the current battery pack comprises of three 12v batteries and weighs in at a hefty 28lb the replacement weighs a little under 4lb, this would very obviously make quite a difference in the bikes 87lb overall weight. However weight isn't the only consideration, I would like to extend the range of my bike and with a little work and some suitable wiring and a couple of switches I could quite easily use the battery as a second power source for longer rides, I fitted a large plastic  tool box onto a rear carrier when I first bought the bike which would easily accommodate the battery or I could possibly even add an external carrier for it behind the seat, the current battery is good for around fifteen to twenty miles depending on how many hills I hit & how much I feel like pedalling, I hoping that an additional battery would double the range meaning I could rely on it to visit nearby towns without having to worry about finding somewhere I can give the battery a booster charge. My main worry is about damage to the motor, I know very little about electric bike motors and having read so many stories about these batteries suffering from overheating problems and even catching fire I am more than a little concerned I could damage to my only transport, I usually ride motorcycles but thanks to a couple of health issues I'm currently grounded so apart from walking which can be pretty limiting this bike is my only way to get around without spending a fortune on public transport I'm looking for advice from people who know about electric bikes and their motors who could give me some simple advice in layman's terms on how to proceed, please don't blind me with all sorts of technical jargon as it really wouldn't help, I'm not stupid it just isn't my field of expertise. Thanks in advance for your help. NG.

Topic by Nostalgic Guy    |  last reply


How to measure amount of fluid in a shot glass?

Hello, I'm definitely new here and not extremely experienced with programming arduino's but know enough to figure things out. Anyways, I'm trying to make a shot dispenser for my sister inlaw for her birthday. All I want it to do is use a diaphragm pump to pump from whatever bottle I put the other end of the tube in and poor exactly 1oz, 2oz or 3oz. +/- .25oz. I thought about using an laser, ultrasonic, and/or a load cell. I would like to just set a time for the pump to run and then shut off but, I'm concerned the time it takes to pull the liquid the distance to get to the end of the spout will through off the timing.(Because the hose will not be completely clear or completely filled 100% of the time. Do you guy's have any suggestions for how to measure this accurately? Preferably based on fluid level or weight. I'd really appreciate any ideas!

Question by spencerm199    |  last reply


Ideas on simple stuff to build please

Hi!I really like building stuff. Recently I builded a pop pop boat and it was great fun! I've also builded other stuff like a self driving car using Arduino and some 3d printed fidget spinners.Now I'm out of ideas of stuff to build. I really want to build something like a sun burner, a lock or similar. Does anybody have an idea of something to build accept for the stuff I mentioned? Some stuff I have are steel, cooper and aluminium pipes, wood, metal sheets, 3d printer with PLA, bearings, glass sheets and Arduino. The thing is that I only have hand-tools, so no power tools accept for a drill.Sorry for my bad English. But any tips and/or tutorials is appreciated!

Question by imimbergman  


shadow profile person ?

Shado profile person cameo

Question by Chrissie67    |  last reply


Android-controlled Android statue

Hideyuki Takei and Reo Matsumura have made this very cool Android statue that can be controlled by an Android app. Very nice. karakuri via MAKE

Topic by fungus amungus    |  last reply


If it is not shown, how do I know which lead is positive on a capacitor?

I don't know which is the positive and negative lead on a capacitor. I want to know how to know which lead is positive or negative.

Question by eeeXsmart    |  last reply


Welcome to the Instructables Teachers Hub!

Welcome to the new home for all things Teacher related on Instructables. We hope you'll explore the new features and come back often to find and share projects, inspiration, and classroom resources. As you explore the new Teachers Hub, you'll see it's easy to find projects by subject or grade level and sort them to find all the best and freshest projects.Be sure to spend some time in the new Teacher Forum. It's a great place to connect with fellow teachers and make new friends! You could start by introducing yourself here or finding a topic that interests you and join the conversation there. :)We'll be working to continuously update and support your needs in this new area of the Instructables community, so thank you in advance for your valued feedback and suggestions.

Topic by WeTeachThemSTEM    |  last reply


Google Photos Videos ruined

My videos in google photos looks like they were all seperated into individual pictures and I deleted all the backups. How do I recover these?

Topic by codyrmiranda    |  last reply


Attaching to Motor Shaft

I have bought a used Washing Machine motor with the intention of using it for a vibrating parts cleaner.Aiming to attach a bolt and nuts off centre to the shaft. I'd prefer to do the bolt idea as I can add/remove nuts to get the correct vibration.The motor has a 22mm diameter shaft which is threaded and I'm looking for the best way to add the bolt.I'm new to mechanical stuff and have looked at couplings and a few other bits but not sure what to use.

Question by alexmallaburn    |  last reply


Give me a feedback

Hello everyone,I have just entered my first instructable, and I wish you give me feedback :)this is my instruactable:https://www.instructables.com/id/Exercise-Your-Min...welcome all opinions :)

Topic by Asmaa_Maher    |  last reply


How to input NUMBERS through Arduino serial.monitor ???

Hello ... I would like to ask, how can my Arduino read/store a number that I sent through the serial.monitor ??? For example ... if I want to say to Arduino, how fast it should flash a LED or how fast should a motor turn. So it reads, what number I write to the serial.monitor and then use it. I was trying to find the answer in arduino forum, but I could not find it. What I was able to find are these infos : 1. I have to check, if it is a number (from 0-9) or a character ... (I have no problem with that) 2. it has to stored and then convert to number Thank you in advance. Zholy

Question by zholy    |  last reply


Which is better K'nex or legos? Answered

I want to know this because i just want to know opinions so tell me yours thanks. If you want, please go to my page and subscribe please thanks for your time.

Question by LEGO SN1P3R[-_-]!    |  last reply


Anyone made a towel warmer?

 We'd really like one, but they are quite expensive. We're wanting one that plugs in so we can use it at home or in the RV. It seems regulating the temp is the main issue and there can't be much more than some kind of thermostat and wires run through a pipe.?

Question by dulciquilt    |  last reply


How to lay stepping stones?

Question by rendermatt    |  last reply


There is a button on my elctric guitar amplifier that says Overdrive. i was wondering what it does?

I know it makes it louder, but is that all it does?

Question by bubbaman22    |  last reply


What came first the chicken or the egg Answered

If you ask me the egg came first because you can't get the chicken without the egg

Question by SeedEatingBird    |  last reply


How to open a new soda/pop machine

Ok i have learned a new bit of info of how to open the new soda machines you know the ones that dont take the new keys...it is by remote...i got the info straight from the source (the guy who was refilling one)...so i thought you would all love to know this...and if you can do more(like make the remote that will open them...) post them here...with the instructable of course...

Topic by girrrrrrr2    |  last reply


Input window should be always open

Hi,I have below Vbs script which will act as virtual assistant to your windows machine. it will close the input window as soon as i enter with an input. i would like to keep that input window always open unless i closes it manually.could you please help me with that. Set Sapi = Wscript.CreateObject("SAPI.SpVoice")set wshshell = wscript.CreateObject("wscript.shell")dim InputSapi.speak "Please type, what you want to open?" Input=inputbox ("Please type, what you want to open.")if Input = "youtube" OR Input = "Youtube"then Sapi.speak "Opening youtube" wshshell.run "www.youtube.com"else if Input = "instructables" OR Input = "Instructables" then Sapi.speak "Opening instructables" wshshell.run "www.instructables.com"else if Input = "google" OR Input = "Google" then Sapi.speak "Opening google" wshshell.run "www.google.com"else if Input = "command prompt" OR Input = "Command prompt" then Sapi.speak "Opening command prompt" wshshell.run "cmd"else if Input = "calculator" OR Input = "Calculator" then Sapi.speak "Opening calculator" wshshell.run "calc"else if Input = "notepad" OR Input = "Notepad" then Sapi.speak "Opening notepad" wshshell.run "notepad"else if Input = "" then elseSapi.speak "I don't recognize your input, Please try something else" end if end if end if end if end if end if end if

Topic by shaiknuru05  


Decimator Crossbow (v7)

Well I finally got some more pieces, more still coming; this enabled me to build something bigger =dThis crossbow(more like cannon, now) has the following specs:Ammo: 1 Standard arrow, which needs to be ductaped other wise torn to shreds.Weight: 4,5 kilo's (9,92 pounds)Range: Not tested outside, will beat the Reaper and the Blockhead for sure.Rubberbands: 32, 8 strings of 4 ( these may still be increased as it shows no bending yet.)Power: Just look at 2nd picture....should explain a lot.Trigger: Same as on the Blockhead, some big improvements on it though.(Surprised about how power much it can take...)Sturdiness: Seems close to unbreakable lol...Without realizing..I also made a very good scope on it o.oI had a purple+blue 3d connector as arrow tip and when I fired on my cardboard box, it made a huge tear...and my ears were ringing like from an explosion O.o'Well this monster has bad points:Need a long/strong left arm if you are right-handed, because this thing is heavy as hell.Cannot fire without trigger.Every arrow needs ductape otherwise connector gets torn off.Also I gonna try and say...:I think this may very well be the most powerful ranged k'nex weapon on this site at the moment.

Topic by Wicky    |  last reply



Does anybody know of a Canadian source of buying KNO3? Answered

I have looked everywhere in my city and cannot find anywhere that sells stump remover or any other potassium nitrate product. If somebody says "look at lowes" they should be ashamed =PI have looked at Lowes, Home Hardware, Canadian Tire, Home Depot, and every other garden supply center around.

Question by FunkNattidelic    |  last reply


What could you do with two empty Crosman CO2 cartridges? Answered

My son has a little airsoft gun, and he gave me two (for now) empty 12g CO2 Crosman cartridges. They are so nice that I want not throw them to the waste. But I have them, and I don't know what thing could I do with them. Some ideas? (refrain from the obvious humor) Length: 8.5cm; Diameter: approx 18mm;  Metal: maybe stainless steel?

Question by rimar2000    |  last reply


Use python or Iot To draw an entire floor system of conveyor

Hello everybody, I am working on a project idea and would like some input from the community. the goal of this project is to be able to use a tote that will a smart one. so we will use a "smart tote". the goal of the "smart tote" is to reproduce the entire conveyor system that exist in any given building. let say we will put the tote on the fisrt conveyor and as the tote is going down the lane I want to be able to retrace it on my computer as a drawing following its step along the way. does anybody could suggest the best way to do that. I would like to use python and integrate some data science technique as well( but that I could figure out).Thank you,Martial

Question by akogho1    |  last reply


Funny Labels

These are hilarious!!! There all REAL funny product lables that people have found. Here's the link to where I got them: http://www.rinkworks.com/said/warnings.shtml Product Warnings: • "Do not use if you cannot see clearly to read the information in the information booklet." -- In the information booklet. • "Caution: The contents of this bottle should not be fed to fish." -- On a bottle of shampoo for dogs. • "For external use only!" -- On a curling iron. • "Warning: This product can burn eyes." -- On a curling iron. • "Do not use in shower." -- On a hair dryer. • "Do not use while sleeping." -- On a hair dryer. • "Do not use while sleeping or unconscious." -- On a hand-held massaging device. • "Do not place this product into any electronic equipment." -- On the case of a chocolate CD in a gift basket. • "Recycled flush water unsafe for drinking." -- On a toilet at a public sports facility in Ann Arbor, Michigan. • "Shin pads cannot protect any part of the body they do not cover." -- On a pair of shin guards made for bicyclists. • "This product not intended for use as a dental drill." -- On an electric rotary tool. • "Caution: Do not spray in eyes." -- On a container of underarm deodorant. • "Do not drive with sunshield in place." -- On a cardboard sunshield that keeps the sun off the dashboard. • "Caution: This is not a safety protective device." -- On a plastic toy helmet used as a container for popcorn. • "Do not use near fire, flame, or sparks." -- On an "Aim-n-Flame" fireplace lighter. • "Battery may explore or leak." -- On a battery. See a scanned image. • "Do not eat toner." -- On a toner cartridge for a laser printer. • "Not intended for highway use." -- On a 13-inch wheel on a wheelbarrow. • "This product is not to be used in bathrooms." -- On a Holmes bathroom heater. • "May irritate eyes." -- On a can of self-defense pepper spray. • "Eating rocks may lead to broken teeth." -- On a novelty rock garden set called "Popcorn Rock." • "Caution! Contents hot!" -- On a Domino's Pizza box. • "Caution: Hot beverages are hot!" -- On a coffee cup. • "Caution: Shoots rubber bands." -- On a product called "Rubber Band Shooter." • "Warning: May contain small parts." -- On a frisbee. • "Do not use orally." -- On a toilet bowl cleaning brush. • "Please keep out of children." -- On a butcher knife. • "Not suitable for children aged 36 months or less." -- On a birthday card for a 1 year old. • "Do not recharge, put in backwards, or use." -- On a battery. • "Warning: Do not use on eyes." -- In the manual for a heated seat cushion. • "Do not look into laser with remaining eye." -- On a laser pointer. • "Do not use for drying pets." -- In the manual for a microwave oven. • "For use on animals only." -- On an electric cattle prod. • "For use by trained personnel only." -- On a can of air freshener. • "Keep out of reach of children and teenagers." -- On a can of air freshener. • "Remember, objects in the mirror are actually behind you." -- On a motorcycle helmet-mounted rear-view mirror. • "Warning: Riders of personal watercraft may suffer injury due to the forceful injection of water into body cavities either by falling into the water or while mounting the craft." -- In the manual for a jetski. • "Warning: Do not climb inside this bag and zip it up. Doing so will cause injury and death." -- A label inside a protective bag (for fragile objects), which measures 15cm by 15cm by 12cm. • "Do not use as ear plugs." -- On a package of silly putty. • "Please store in the cold section of the refrigerator." -- On a bag of fresh grapes in Australia. • "Warning: knives are sharp!" -- On the packaging of a sharpening stone. • "Not for weight control." -- On a pack of Breath Savers. • "Twist top off with hands. Throw top away. Do not put top in mouth." -- On the label of a bottled drink. • "Theft of this container is a crime." -- On a milk crate. • "Do not use intimately." -- On a tube of deodorant. • "Warning: has been found to cause cancer in laboratory mice." -- On a box of rat poison. • "Fragile. Do not drop." -- Posted on a Boeing 757. • "Cannot be made non-poisonous." -- On the back of a can of de-icing windshield fluid. • "Caution: Remove infant before folding for storage." -- On a portable stroller. • "Excessive dust may be irritating to shin and eyes." -- On a tube of agarose powder, used to make gels. • "Look before driving." -- On the dash board of a mail truck. • "Do not iron clothes on body." -- On packaging for a Rowenta iron. • "Do not drive car or operate machinery." -- On Boot's children's cough medicine. • "For indoor or outdoor use only." -- On a string of Christmas lights. • "Wearing of this garment does not enable you to fly." -- On a child sized Superman costume. • "This door is alarmed from 7:00pm - 7:00am." -- On a hospital's outside access door. • "Beware! To touch these wires is instant death. Anyone found doing so will be prosecuted." -- On a sign at a railroad station. • "Warning: do not use if you have prostate problems." -- On a box of Midol PMS relief tablets. • "Product will be hot after heating." -- On a supermarket dessert box. • "Do not turn upside down." -- On the bottom of a supermarket dessert box. • "Do not light in face. Do not expose to flame." -- On a lighter. • "Choking hazard: This toy is a small ball." -- On the label for a cheap rubber ball toy. • "Not for human consumption." -- On a package of dice. • "May be harmful if swallowed." -- On a shipment of hammers. • "Using Ingenio cookware to destroy your old pots may void your warranty." -- A printed message that appears in a television advertisement when the presenter demonstrates how strong the cookware is by using it to beat up and destroy a regular frying pan. • "Do not attempt to stop the blade with your hand." -- In the manual for a Swedish chainsaw. • "Do not dangle the mouse by its cable or throw the mouse at co-workers." -- From a manual for an SGI computer. • "Warning: May contain nuts." -- On a package of peanuts. • "Do not eat." -- On a slip of paper in a stereo box, referring to the styrofoam packing. • "Do not eat if seal is missing." -- On said seal. • "Remove occupants from the stroller before folding it." • "Access hole only -- not intended for use in lifting box." -- On the sides of a shipping carton, just above cut-out openings which one would assume were handholds. • "Warning: May cause drowsiness." -- On a bottle of Nytol, a brand of sleeping pills. • "Warning: Misuse may cause injury or death." -- Stamped on the metal barrel of a .22 calibre rifle. • "Do not use orally after using rectally." -- In the instructions for an electric thermometer. • "Turn off motor before using this product." -- On the packaging for a chain saw file, used to sharpen the cutting teeth on the chain. • "Not to be used as a personal flotation device." -- On a 6x10 inch inflatable picture frame. • "Do not put in mouth." -- On a box of bottle rockets. • "Remove plastic before eating." -- On the wrapper of a Fruit Roll-Up snack. • "Not dishwasher safe." -- On a remote control for a TV. • "For lifting purposes only." -- On the box for a car jack. • "Do not put lit candles on phone." -- On the instructions for a cordless phone. • "Warning! This is not underwear! Do not attempt to put in pants." -- On the packaging for a wristwatch. • "Do not wear for sumo wrestling." -- From a set of washing instructions. See a scanned image. ________________________________________ Assurances: • "Safe for use around pets." -- On a box of Arm & Hammer Cat Litter. ________________________________________ Small Print From Commercials: • "Do not use house paint on face." -- In a Visa commercial that depicts an expecting couple looking for paint at a hardware store. • "Do not drive cars in ocean." -- In a car commercial which shows a car in the ocean. • "Always drive on roads. Not on people." -- From a car commercial which shows a vehicle "body-surfing" at a concert. • "For a limited time only." -- From a Rally's commercial that described how their burgers were fresh. ________________________________________ Signs and Notices: • "No stopping or standing." -- A sign at bus stops everywhere. • "Do not sit under coconut trees." -- A sign on a coconut palm in a West Palm Beach park circa 1950. • "These rows reserved for parents with children." -- A sign in a church. • "All cups leaving this store, rather full or empty, must be paid for." -- A sign in a Cumberland Farms in Hillsboro, New Hampshire. • "Malfunction: Too less water." -- A notice left on a coffee machine. • "Prescriptions cannot be filled by phone." -- On a form in a clinic. • "You could be a winner! No purchase necessary. Details inside." -- On a bag of Fritos. • "Fits one head." -- On a hotel-provided shower cap box. • "Payment is due by the due date." -- On a credit card statement. • "No small children." -- On a laundromat triple washer. • "Warning: Ramp Ends In Stairs." -- A sign, correctly describing the end of a concrete ramp intended for handicap access to a bridge. ________________________________________ Safety Procedures: • "Take care: new non-slip surface." -- On a sign in front of a newly renovated ramp that led to the entrance of a building. • "In case of flood, proceed uphill. In case of flash flood, proceed uphill quickly." -- One of the emergency safety procedures at a summer camp. ________________________________________ Ingredients: • "Ingredients: Artificially bleached flour, sugar, vegetable fat, yeast, salt, gluten, soya flour, emulsifier 472 (E) & 481, flour treatment agents, enzymes, water. May contain: fruit." -- The ingredients list on a package of fruit buns. • "100% pure yarn." -- On a sweater. • "Some materials may irritate sensitive skin. Please look at the materials if you believe this may be the case. Materials: Covering: 100% Unknown. Stuffing: 100% Unknown." -- On a pillow. • "Cleans and refreshes without soap or water. Contains: Water, fragrance & soap." -- On the packet for a moist towelette. See a scanned image. ________________________________________ Instructions: • "Remove the plastic wrapper." -- The first instruction on a bag of microwave popcorn; to see the instructions, one first has to remove the plastic wrapper and unfold the pouch. • "Take one capsule by mouth three times daily until gone." -- On a box of pills. • "Open packet. Eat contents." -- Instructions on a packet of airline peanuts. • "Remove wrapper, open mouth, insert muffin, eat." -- Instructions on the packaging for a muffin at a 7-11. • "Use like regular soap." -- On a bar of Dial soap. • "Instructions: usage known." -- Instructions on a can of black pepper. • "Serving suggestion: Defrost." -- On a Swann frozen dinner. • "Simply pour the biscuits into a bowl and allow the cat to eat when it wants." -- On a bag of cat biscuits. • "In order to get out of car, open door, get out, lock doors, and then close doors." -- In a car manual. • "Please include the proper portion of your bill." -- On the envelope for an auto insurance bill. • "The appliance is switched on by setting the on/off switch to the 'on' position." -- Instructions for an espresso kettle. • "For heat-retaining corrugated cardboard technology to function properly, close lid." -- On a Domino's sandwich box. ________________________________________ Requirements: • "Optional modem required." -- On a computer software package.

Topic by LoneWolf    |  last reply


What is this tool?

I ran across this in a toolbox I inherited and have no idea what it does? Anybody have any familiarity with this thing?

Question by DrTurtle    |  last reply


Impresion 3D

Quiero saber como construir una impresora 3d

Topic by orlandoclaudio  


Peltier Cooler/Heater - Pooling Brainpower

I recently acquired a thermoelectric mini fridge. As a fridge, it doesn't work so very well - it will get down to ~50 degrees with an ambient temperature of 70. So, I took it apart. You know the saying: "If it ain't broke - fix it until it is." So I now have a peltier effect cool/heater. I put my meat thermometer on the cold side with the fan off - and it gets down to freezing (probably a bit below). On the hot side, with a big sink and fan - it seems to be ~85 at it's warmest point (this sink is about half a square foot and an inch deep). Ideas on where to use? It's 110 service.... It literally almost killed me a few days ago when I touched a transistor sink that was part of the rectifier circuit while holding a plate that was grounded (I got knocked out for a few seconds) I've got a couple ideas, I just figured I'd pool brain power and see what happens :p

Topic by trebuchet03    |  last reply


Peltier thermoelectric heat pump, can it be used as Solar Generator?.

Can a 40 mm square Peltier thermoelectric heat pump be used as a solar generator It operates on 13 Vdc @ 5 Amps. Operating at 13 Vdc, we measured the hot side at 190 Deg. F and the cold side at 55 Deg F. I have a 6 foot reflector dish and can add Reok led tracker. How many watts will it generate if it does?. Thanks for your help

Question by talei1    |  last reply


how much heat does the warm side of a 12v thermoelectric peltier produce?

I'm thinking of using a thermoelectric peltier device to heat my body while sleeping during winter camping (I have a 12v solar panel and where I'm going it's always light out). Will the warmside of the peltier heat enough so that if its in contact wih my body it will warm me? if its too hot i'll just wrap it in a sock or soimething.?

Question by leevonk    |  last reply


What is this tool for?

Can anyone tell me what this tool is for?   I came across it all rusted and thought it was some type of pliers or cutter. After I cleaned it up I could tell it was probably neither. What I thought was a plier jaw is actually one piece and does not close and what i thought maybe the cutting blade, actually had lines and numbers, like a ruler. The one small screw that the spring is attached to, will allow you to adjust how far the jaw/cutter will close and the other screw, when loosened a bit allows you to slide the little metal 'arm' in or out, like a measuring template. It has some fancy designs on the handles as you can see and the only marking says "Made in Western Germany".

Question by millsy22    |  last reply


Featured or not Featured

I've recently published an instructable. Then, I've received an email that says my project was marked as featured, even if it isn't on featured pages. It also doesn't have the little star on the upper right corner... What happens exactly? Is it featured or not ??? Please help me.https://www.instructables.com/id/Pocket-Signal-Visualizer-Pocket-Oscilloscope/

Question by YADUKRISHNAN K M  


12v DC battery amp measurement? Answered

HI, I have a 12v dc battery and I wanted to measure the amps. Can anyone show me how to hook up the multimeter? Thanks

Question by amantux    |  last reply


what is the best knex plane with instructions?

I would like to make a knex plane so i need one with instructions please post.

Question by dansdoc    |  last reply


Any New Classes for Instructables?

Will there ever be any new classes offered on instructables? Can we expect any openings in currently listed classes?

Question by stillastudent2    |  last reply


Stepper and Spindle Connectors for CNC3018 controller board

Does anyone know the type/model of the connectors used for the stepper and spindle motors used on the grbl controller boards on CNC3018 etc milling machine?I'm making a tacho spindle controller so that the load does not significantly affect spindle speed (which can be a problem milling some plastics).Thanks

Topic by palee1952  


Help with fan

I am trying to hook up to ir sensors to a fan. Here is the circuit diagram. Is this correct? I will be using an arduino? Do i need a switch? The reason there are two ir sensors is because there is one on each side.

Topic by oro2veritas  


Can One use a MATCUT 100 plasma cutter to build a CNC.

I am currently planning to build a CNC plasma cutter. I own a MATCUT 100 plasma cutter and I want know am I able to use this plasma cutter to make a CNC.

Question by kroonmalcolm6  



&quot;Joule Thief&quot; LED Night Light Kit &amp; PCB

UPDATE: Everything is shipping now. My instructable is here: "Joule Thief" LED Night Light  Check out the new color changing Joule Thief! KIT Pricing is $10.50 for the kit. Kit 5 Pack Save by ordering 5 packs for $39! PCB Pricing is $4.50 for the PCB. Shipping is $5 for USA, $17 for the rest of the world. *** NOTE: The color of the PCB will be green instead of purple shown in some of the pictures. *** Payment To order, please go to my site - http://www.theledart.com/blog/archives/259. Click on "Add to cart" button and check out via PayPal. Please send messages or leave comments here if you have questions. Thanks!

Topic by ledartist    |  last reply


has any one cried in a dream and then woke up and had tears in real life.?

Like some one die in a dream  and cried and then woke and they were crying in real life.

Question by build52    |  last reply


How do i fix these patches and tiny black holes in wood furniture?

I'm not sure what made these patches or the holes but i wanted to try and fix it

Question by mueblehog    |  last reply


Any ideas on making a fairly realistic Jason mask (Friday the 13th)??

I'm looking to make a realistic, fairly inexpensive Jason (Friday the 13th, hockey mask, machete-wielding badass) mask for my Halloween costume and I need some help. The only affordable masks I'm finding are flimsy plastic ones like the one on the photo below or foam masks that look like they're for a 5 year old. I've seen some pretty good fiberglass ones on ebay (like the one in the second picture I've included), but they run over a $100....and none of them are exactly what I want. So, I want to make one.... I'm thinking I can take one of the cheap plastic ones and alter it....I want to do more than just paint it though. I want to make the mask more rigid and appear more like resin or fiberglass than plastic. So, I need some sort of liquid or putty that looks something like resin to cover the mask in that will make the mask more rigid and still allow me to paint on it. and I'll probably drill some more holes to match the ones in the movie and put leather straps on it. any thoughts? anyone made a Jason mask before that could offer some advice?

Topic by movieguy711    |  last reply


Can someone help me make a low cost shower oppurtunity? Answered

Can someone help me make a low cost shower oppurtunity?Like the Zodi camping shower or Eccotemp? They seem real easy. Im just not that handy...Thanx!Links to both:Zodi: http://www.zodi.com/web-content/Consumer/zodihottaptravelshower.htmlEccotemp: http://www.productsthatsave.com/ptsl5.html

Question by kimxtc    |  last reply


Instructables Search Function with Pictures

Hello, whenever i search for projects, the suggestions are shown without pictures, or only when i open the instruction. Is there a possibility to see the main picture of all suggestions of the search?

Question by Failx    |  last reply