Found a website with a really great "LED basics" type tutorial. Hope it is helpful!http://www.kpsec.freeuk.com/components/led.htm
Topic by 8bit | last reply
Is there a website to learn about how to use picmicro's really easily? I realize that there are some instructables about it, but to be honest they arn't very helpful. For example, I have no clue what the crystal does, why you need it, how to hook it up, and how much voltage they need because I need to buy some.
Topic by guyfrom7up | last reply
Help! I am way into BASIC. Lately, I have been wanting to make a little DIY pocket computer with a basic gray scale screen and nav buttons that can run simple BASIC programs uploaded from my computer. I looked around Google to find somewhere to start, and found out that no one has ever attempted building such a thing before. One site suggested that I should look at mobile motherboards by TI and Atmel. However, when I arrived at the websites, I found a bunch of complex, expensive boards that have unnecessary fetures such as WiFi and touch. I need some help on what hardware configuration to use (aka mobile motherboard, chip set). Help!
Topic by akchicken | last reply
I am a beginner to the Arduino field can you please help me with these questions ? How many smartphones can communicate with a single Arduino at a time? How many Arduino a single smartphone can communicate with at a time? How many devices such as AC TV and lights can be connected to a single Arduino? Is voice/noise isolation room affects Bluetooth transmission (if my phone connected to the Arduino using bluetooth)? In case of smartphone outside the room containing the Arduino. please if you have any references or links that might help with understanding the main concepts please help..
Question by maryamCS | last reply
I brought 5 RGB LED's just now on the interweb, but I have no clue about circuits all I know is theirs parallel circuits which I will be using and I have a power source of 2 AA batteries. Sorry for such a newbish question, any links to and learning articles would be greatly appreciated.
Topic by Antexter | last reply
Hey I got Atmel ICE basic, 6 pin wire and atmega1248. I try to sent program code, but there comes error message. How I should connect pins? http://www.atmel.com/Images/Atmel-42330-Atmel-ICE_UserGuide.pdf http://www.atmel.com/images/Atmel-8272-8-bit-AVR-microcontroller-ATmega164A_PA-324A_PA-644A_PA-1284_P_datasheet.pdf
Question by mattilaniko | last reply
Hi all. I am making a CPU benchmark program in Visual basic Express 2010. I have everything I need except the actual STRESS TEST. :D Heres a BASIC look at what i'm thinking i'm going to need. Private Function StressTest() As Integer 'Complex math that will STRESS the CPU a lot math.math.math............................ math math math................. 'Complex math that will STRESS the CPU a lot return time-taken-to-run-test-in-mili-seconds End Function Please help me make this! I am SOOOOOO Close! All I need is to know how long the thing took, and the actual math that puts STRESS on the CPU!!! PLEASE HELP ME OUT!!! IT WOULD MAKE A 12 YEAR OLD'S DREAMS COME TRUE!!! THANKS!
Question by sci4me | last reply
I am making a box that when opened will sound an alarm. When it is closed, the contacts are touching, thus completing the circuit. When the box is open they are not touching. How can I make a circuit that will realize when theyre not touching(without using an Arduino or other programmer)???
Question by crocboy | last reply
Hello all! I'm beginning down the route of hobbyist electronics. As to basic safety precautions I'm really quite unsure. I know inside many electronics parts and devices (For example, a TV one would strip for parts,) there are many nasty chemicals. I don't want to get lead poisoning or any other sickness. If you could point out some safety precautions, I would be incredibly grateful (Ex. Always wear gloves, wear a mask when soldering, when stripping a TV...., etc.). Thanks for your time and help!
Topic by I Am That Guy | last reply
Hello instructable forum. I had a qick question about a project I'm thinking of doing. So I wanted to make a poker table. I know how I'm going to do that, but I wanted to make a built-in dealer chip. So I was planning to put 8 LEDs (One for each station/person) And at one station there would be an Push button. I want one LED to be lit up at a time, and when the button is pushed, I want the power to transfer to the LED to the right of where it previously was. Again: I only want ONE LED to by lit at a time. I'll include a basic pitcure for a visual. I think I'll need a demultiplexer and a counter, but not too sure how to use them. thanks, Jusstice
Topic by Jusstice | last reply
Hi guys, recently I thought that what if i make an rc car that charges while I use it outside in the sun, that way I can use it as much as I want (outside in the sun) and I wont need to charge it. I have attached a picture showing the wiring, but I have a few questions. Q1. Will it work?? Q2. If it does than what will happen when im not using it and the solar panel uses the light in my room and overcharges the battery resulting in it catching on fire? Q3. Would it be better if i replace the car battery with rechargable cells? Help with be greatly appreciated :) Oh and don't mind my grammar, its not very good hehe UPDATE changed diagram, will this work?
Question by The Prickly Potato | last reply
Hey Guys, Today I made one of the simplest circuit I have ever made, its literally two motors in parallel with a switch. The problem is it didn't work :( (embarrassing). I don't know what I did wrong. When i flip the switch the motors just spins for 1 microcentimetre then stops. I even attached an led to the terminals of the motor it just blinks once then turns off till i flip the switch again. Anyway wiring and demonstration is in the pictures, videos provided. Here are somethings to note: 1. The motors were working perfectly before i made the circuit. 2. The battery (may) be half used. 3. The glue used to attach them to the base (styrofoam) is hot glue, so I had to be verryyyy careful to not melt itithe base). 4. I cant take it apart since its attached to the base and the base will break and using glue with styrofoam wasnt easy so I dont want to do it again. 5. I have tried even by moving the motors a bit away so that they dont touch, still doesnt work. 6. If I leave it on for say a minute the battery gets slightly warm to the touch. 7. I cant find any short in the circuit.
Question by SA-DIY | last reply
I have a cebora plasma cutter that is in tacked and complete but doesn't work I'm having a problem with repair centers because theire isn't one with in 100miles from me and snap-on and other tool men who come around keep try ing to sell me a new one Ok to the point there's not much to these things I have basic knowledge in electronic ITT 3 semesters, divorce killed that, and hands on knowledge automotive industry 20 years, Where should I start in my trouble shooting Got to go Company showed up
Question by reinovator
I used about 5 ft of 22-24 gauge insulated(thin) wire(single strand)and coiled it into about 1 inch long coil, the power is about 170VDC , when I test it out nothing happens, My ground is soldered together and I test it by connecting the positive to the other end of the coil, there is a spark but no projectile i try moves at all.
Question by tom10122
I purchased the Arduino Basic Kit a number of years ago. The directions say to go to Autodesk.com/Adruino to get started, but that page doesn't exist anymore. Does anyone have a PDF of the project directions for the parts included with the kit? Thanks.
Topic by bryan.thatcher | last reply
Can anyone recommend a book/website where I might learn the basics of electronics? As basic as possible would be nice. I'm just tired of seeing wonderful things on this website I can't make because I don't understand the first thing about voltage, etc.
Question by 5m17h | last reply
Hi all! I just found a parallax basic stamp at a price I couldn't really resist. Now I am wondering if anyone who has worked with these micro-controllers knows of a good guide to learning the programming language that is free or rather cheap. Thanks for your time! :)
Question by thegeeke | last reply
I need to make a basic fm antennae for my reciever inside my mancave, It's a steel shed converted and inside reception drives me crazy. I do have basic poles and some wire types in my arsenal. Someone PLEASE HELP. I need my music to keep my sanity if you can relate.
Question by gday85208 | last reply
Hi there im interested to know if any body has the brain and know how to make one of these http://www.core77.com/blog/wearable/durr_the_vibrating_watch_from_skrekkogle_that_sort_of_tells_time_26234.asp could be a cool project Kind regaurds John Cook
Question by johncook-2 | last reply
What are some some light ideas that I can use for photography without having to purchase expensive equipment? Do not want to invest in photo equipment until I make sure it's something that I decide that I want to take seriously! Hope someone can give me some helpful advise!
Question by 2di4 | last reply
I'm new to arduino's but not new to programming, more of a novice, so my question is more physical than logical- why does my push button say i've pressed it 4 to 7 times on the serial print, when i've only pressed it once? is my push button broken? and when i hold the push button down, the serial print says i'm pressing it repeatedly?
Question by DemolisionWolf | last reply
So, I was making this circuit and ran into some problems so I would like it if any one of you could help me. (Schematic attached) Q1. Do you see any basic problem in this circuit? Q2. Will this relay (http://zaymanta.com/media-library/stores/RALEY-6V-10A.jpg) work with 5v? I have tried this before and it works but I was wondering if there will be any problem like flickering, fluctuating or something like that. Q3. Which transistor should I use for this job? Q4. Can you check if the esistor with ldr (and rest) is of the right value? Q5. Can anyone modify this circuit so that the red led turns off when the relay is active and the green turns on (instead of both turning on)? The relay will be used to control 240v. Thanks alot in advance :).
Question by SA-DIY | last reply
Ect student @ Devry here trying to put what i am learning to practical use. I reeeelay want to learn arduino it seems very fun and has a wide range of things you can do with it. Other than basics (mm solder eq resisters/leds & tools and such) what are some "must haves". Info like what board to start out with, power supplies i should acquire. Hints tips tricks, places to read would be great. I am somewhat limited on money (father of 7 trying to pay my way.) So i need to be budget minded. I have loved this site for a while and recently upgraded my membership. Some of the projects i see come from this community makes me drool. Ty for reading.
Topic by Evan N. | last reply
Hello, If the input to the positive terminal of an op amp is 12V, the input to the negative terminal is 10V, and there is no supply voltage, the output voltage is 2V and the output current is 0. Correct? Now, what I don't understand is what happens to the output voltage and current if I connect a supply voltage of, for example, 15V. I know that the output voltage and current both increase, but I don't know the math behind it. Can someone explain this to me, please?
Question by frossiove | last reply
Anyone know a site that lists what household item contain useful materials to use in various instructables? I'm not explaining it too well but I live in a small town and can't get many of the materials needed to make things like the LED cubes, so I was hoping there was a site that tells where I can find things like LEDs, 100 ohm resistors or momentary button switches in everyday objects. like NiChrome wire in toasters or 330volt capacitors in disposable cameras.
Topic by grantdevine | last reply
Hello everyone i'll try to keep this short and sweet. In my next project I will be re-Building a trolling motor. The trolling motor runs on a 12 volt battery, and draws between 5 to 30 amps. The problem I have is that the control unit/head of the trolling motor is destroyed. In other words all i have at this point is a 12 volt motor connected directly to a 12 volt battery. The trolling motor is very powerful and I don't want to run it full power all the time. This made me look for a 30 amp dimmer switch, just like the ones people have in their homes. With no results I don't know what to do. I am thinking about using a 600 watt AC dimmer switch like the ones in peoples homes, but I don't know if it will work with a DC circut like the one I have. Thanks for your time and help. ~KayakKid
Question by Kayak Kid | last reply
Okay, here's the deal. I want to put this design on the blade of a knife I'm making (the design is the USNA class of 2013 ring crest). Before I can do that I need to have a stencil made of the design so I can etch it on the steel. But, the design is to complicated (all the shadowing and such). So I need to clean it up, get rid of shading, shadows, all that. How would anyone suggest I do that? I gifure I'll have to do some editing in a photo editing program, what program? And how do I do it? Thanks for any help, I'm not a computer graphics person at all, so explain it like you would to your grandpa (no I'm not old, just not computer smart) Oldanvilyoungsmith
Question by oldanvilyoungsmith | last reply
I apologise in advance to all you keen photographers for my Absolute Novice status. I need to take photo's for my Instructables which are usually small-ish desk top items. Currently I am having problems with a dark (black paper) drawing in a glass frame, how do I get the details in the image without it bleaching out or flaring on the glass? I have a spacious work desk under a window, two cantilever lights, a centre room light, etc. I can only use whatever's available in my house because I never take pictures for any other reason. Any tips for a very grateful novice would be very welcome.( I'm a blank slate)
Topic by craftyv | last reply
Hi community , i need help to wire my small project and its about a water dispenser, but with the big water bottle(22liters) is on the floor, so there is : a water pump(to pump water to a small tank on the water dispenser or cooler),rocker 3 position switch, floatswitch, electric transformer 220-12v. WHY? a 3 positon switch the pump works on 2 different modes _ the first continuous mod that stops only when the small tank is fully filled ( wired with the floatswitch ) _ the second mode is : just a simple working pump with no stop ( not wired to the floatswitch ) So TAKE A LOOK ON THE ATTACHED PHOTOS PLEASE LET ME KNOW HOW TO WIRE THE ROCKER 3 POS SWITCH , And if there is a wiring diagram that will be the best of the best !!! Thank you, ""HELPFUL community""
Question by vwtm2006 | last reply
Well... I'm making this battery charger cum level indicator, which should turn off the battery supply when its voltage drops below 10V. Im using an opamp as a comparator to do that. I have been scratching my head for 3 days but cant get this sorted. From what I have been experiencing for years, on an op amp if the potential on the in+ pin is higher than that on the in- pin, then the output pin goes high, else low. Right? Now in this particular case (and the first time in my life) the ic gives 4.xx Volts on the output pin when in+ is higher than in- and 11.xx volts when in- is higher. Vcc is 12V. Im bugged... I have attached the part of the Schematic that shows the IC and its connections. Please have a look. I haven't changed the IC yet, im doing that in a minute anyway. I'll mark this solved if the new IC does the trick. :)
Question by pro2xy | last reply
My goal is to press a button on my transmitter side and have the receiver flip a relay - that's all. It's probably the simplest possible use of RF technology... and it's almost impossible to work out on google. I am trying to transmit and receive just a simple control signal about a range of 300m, so dismantling 27Mhz toy cars is not an option. Has anyone successfully made a simple RF circuit before? I can buy a 433Mhz transmitter with this range, but they take FSK or ASK modulated signals. From what i can tell, there is nothing simpler than the 'OOK' version of ASK modulation for transmitting signals. If I'm wrong, please correct me. Otherwise, if I'm stuck with FSK or ASK. I found one site (bottom of PDF: http://www.edn.com/contents/images/101101di.pdf) providing a simple circuit to produce FSK. I was hoping for something simpler, but if you think this is the easiest way, i'll give it a shot. Can someone guide me towards the correct ICs and circuits to create this project? Thanks in advance for your help
Topic by trytrytryagain | last reply
Although I can carve my way through data and can tell you a lot about how data is stored on various mediums, I am not the best electrical engineer, but I still do some projects for fun. I have a project that I am working to help a friend of mine who works in a climbing wall. They had an existing siren at the top for the kids that someone broke, and wanted to switch it out to something that they could put custom sound effects on. I happened to think of the 9V recording module at Radio Shack (http://www.radioshack.com/product/index.jsp?productId=2102855#tabsetBasic), and proceeded to hack it to make it more usable for their needs. I made two different parts to it: 1. The recording module in a project box, and 2. A momentary switch at the top of the wall to trigger the module. I changed the microphone on the recording module to a 1/8 in jack, sent the speaker output to a better speaker (with an amp of course), added a record button to the outside of the main project box, and created a "triggering system" by soldering a separate wire to both 1 and 2 in the picture, and then shorting it whenever I want to trigger the sound. It worked perfectly in my shop, but when I installed it, the test trigger on the ground works, but the switch on top of the wall does not work well... it only works intermittently. The wall is 2-stories high, so figure a 22 foot run for the wire (and I don't remember what gauge wire I used... it was just something I had laying around... but figure cheap speaker wire). My first guess was that it wasn't getting enough power from the battery, so I switched it out to a AC-DC adapter instead of the battery. I am still having problems, so I am guessing it is too much resistance due to the long run? (Would you agree or disagree?) If so, is there some type of amplifying circuit that I could use to overcome this? The only other explanation that I have is that the momentary switch that I am using at the top is pretty old and could be going bad, but I wanted to check first and see what you EEs out there think. Thanks for your help! :) Edit: I'm sorry I am so bad at explaining this... I have uploaded my attempt at a schematic for clarification. Edit: After installing a new switch, it did work a little better, but still not 100%; so I installed the relay, which solved the problem. Thanks to everyone who helped! :)
Question by thegeeke | last reply
Like diodes and servos and radio theory whatnot? Did you take classes? Read from books? I'd like to learn this sort of stuff, but can't find anyone to teach me. I also don't feel comfortable enough with this stuff to buy a bunch of parts and mess around with a book..
Question by kpwang2 | last reply
Hi, this is monojit from guwahati , assam I am currently using visual basic 6.0 to develop customize software. Now i want to use group policy in visual basic 6.0 as per my client's need. I have tried to execute this thing with my own knowledge but failed. Will u help me in this regard? Thanks in advance. Regards, Manajit Roy Guwahati,Assam E-mail: email@example.com firstname.lastname@example.org
Question by MONOJIT
Hello all, I'm very new to Arduino programming, and was trying to write a basic sketch to flash some LEDs in a jack o lantern for halloween, but I'm struggling with the code. Essentially what I wanted to accomplish was blinking a LED from pin 13 x times, followed by fading (pulsing) another LED from pin 9 x times and then repeat. If anyone would be so kind as to help me accomplish this, I would be very grateful. Thanks in advance.
Topic by SubEclipse | last reply
I am working on a project which involves usage of a Basic Stamp 2 module. I need your help because I'm a newbie and I don't know hot to program it yet to do the job. I want every time the right (or the left, it doesn't matter) built-in touch sensor is pressed, the right (or the left, it doesn't matter) motor to be given power for 5 times with a pause of aprox. 1 second between each time (see picture), and then stop.I would really appreciate that if you could help me. Please post your program, or pm it to me.ThanksP.S. Be careful! I DO NOT use servos! I use simple DC motors with a driving module! Here are the microcontroller ports for each motor and touch sensor:Left motor: ports 3 and 5 of the X7 extension busRight motor: ports 14 and 15 of the X7 extension busLeft touch sensor: port 4 of the microcontrollerRight touch port: port 6 of the microcontroller
Topic by andrewsweet4
? Looking to make a simple LED scoreboard for scoring "Bags" games (Cornhole). All i Need is 2 rows of 21 LEDS on each side of a vertical board with the bottom denoting scoring "1" and the top as "21". And I'd like to have some sort of momentary button to press that would move the circuit from 1 to 21 one increment at a time (moving up, turning on the next as the last one turns off). I could just put switches on each led but I am trying to avoid that. Any advice would be helpful. Thanks PS , if all the lights stay on until i get to the top and then able to reset it, that would be fine too, Just trying to eleviate the use of multiple toggle switches.
Question by djtonyc77 | last reply
Hi i have a device which normally uses a transformer rated at 2 amps outputting 5 volts. i want to put together a battery pack to power this device. it's easy enough to put together the batteries and get a 6 volt output, but i'm worried about burning out the device w/a 6-volt power source. i'm thinking putting a resistor in the circuit should be enough to lower the voltage to 5. if i remember my high school physics right, i'd need a resistor whose resistance is r = (v1 - v0) / i = (6 - 5) / 2 = 1/2 ohm ...but this seems strange. 1/2 ohm?? my approach must be too naïve. can anybody point me in the right direction? thanks doug
Topic by dielan123 | last reply
Before I begin: yes, I should know this already, but I'm really sleep deprived right now, and therefore slightly muzzy on my electronics knowledge... My circuit has two loops running in parallel off one, limited, 18v power supply: [*] Loop 1 requires the majority of the supply's power to run [*] Loop 2 is simply a 7805 voltage regulator supplying 5v to an analog input on an Arduino, so needs almost no current running through it. [*] when Loop 1 and Loop 2 are both active, Loop 1 does not get enough power. if I place a resistor in Loop 2, in series with the 7805, will it increase the amperage to Loop 1? I think the answer is yes, but, once again, I'm MASSIVELY sleep deprived. any help is appreciated.
Topic by gschoppe | last reply
Hello all. Pretty daft and most likely simple sollution to those who know what they are doing I'm sure. I am building a 132 LED clock (60 for seconds, 60 for minutes and 12 for hours). I'm using a Picaxe 28X2 and will most likely be using 3 MAX7221's to display the LED's, 1 each for the hours, minutes and seconds. I'm currentlty using a DS1307 RTC module to keep time. Exposition over! My question is, I am using open source code from a guy who made a clock using Pic 28X1, MAX7221 and DS1305 displaying on four 7-segment displays. now the differences between the Pic's with regard to coding I can handle, although I do have a 28X1. The fact that the DS1305 and 1307 use SPI and I2C respectively means that the differences between comms protocols are confusing the hell out of me. Now please forgive the length of this question. Basically, I need some pointers as to whether it would be better to try and convert the code to use I2C for the RTC and stick with SPI for the MAX or should I just buy a DS1305 at almost £6 per chip and make my life a bit easier? I have already tried using the code with my 1307 but the 7-seg display I have just stays on the No2. As for the differences in display type...well I'll come to that once I get the timing working. If I've left anything out or you need more information then please let me know. Here is the link to the clock schematic: http://tech-tut.com/wp-content/uploads/2008/08/real_time_clock_advanced_schematic.pdf And the code is far too long to be pasted here I'm affraid and the file I originally got it from had converted it into word which pushed all the lines together. That was a fun few hours sorting that out! Thanks in advance
Question by LED Maestro | last reply