How to make a flip flop/toggle with 4 input and 4 output when one On, rest will be off automatic
Question by jasveerg
How hard would it be to make a metronome with 4 leds. I don't care about speakers. There are projects like that in instructables and youtube but they're all 2 leds and a speaker. They go 1-2-1-2-1-2-1-2-1-2 I want it to go 1-2-3-4-1-2-3-4-1-2-3-4 it would be pretty cool with different color leds. What would it require, probably similar materials to the instructables, but less cause there is no speaker. How would the circuit look like?
Question by alester333 | last reply
Hey, I'm not understanding something here. If I hook up a pot (left 9v, middle A0, right GND), I get a varying voltage into pin A0 on Arduino. Then Arduino converts this into whatever. Well when I hooked up 4 potentiometers parallel to the same battery, and had them on pins A0-A3, none of the pots worked. Whenever I turned one pot, it would change the value for all the others (i was using serial monitor). How do I correctly hook up four pots to Arduino?
Question by HavocRC | last reply
The new iPhone has just been out for a few days and someone's already made a short film with it. Shot and edited entirely on an iPhone 4 over 48 hours, "Apple of My Eye" is a gripping tale of ice cream and model train nostalgia. Check out the video below to see the movie and some behind the scenes footage.
Topic by fungus amungus | last reply
So here's the problem, my friends and I are in college and love our x-box console, but hate the small screen. Not having a big scren, we are trying to find out how to get the one console to have four screens. We all have smaller TV's and there is on medium one in our living room. The game splits up 4 players into equal quaters of the screen. My thought is that the x-box video should go into a laptop and then be split u into 4 displays, with the laptop screen being the a full screen. The laptop in question has 1 S-video, 1 standard monitor output, and 5 USB ports. How do we do this, for cheap? I'm thinking it would maybe work like those walls of TV's that make up 1 big picture.
Topic by Bertboy2012 | last reply
Hi team I posted this on the Arduino forum, and had a search through several electronics sites; perhaps there's also someone here who can suggest something. I have successfully hooked up my touchscreen to Max via Arduino; the code is fine, the circuit is fine and the Max patch is fine. I'm just wondering if it's possible to tweak the sensitivity of the entire circuit? When touching, one must press fairly firmly, otherwise any relaxation of touch, even with continued contact, results in a rapid fall to zero. In the Max patch, I'm using [sel 0]-> outR, after all the [serial] gubbins to help smooth some jitter. But is it possible to tweak the sensitivity, perhaps by using resistor values other than 10k. Hey, maybe even connect a variable resistor to allow realtime tweaks? Hmmm. Thanks Brendan
Topic by brendanmccloskey | last reply
Hi guys, i need your help! I have an Enermax 12cm fan (EB122512H), i need to plug it to a 12v DC power supply but i don't know how to wire it; The fan has 4 wires (yellow, black, white, red) but the power supply has just two wires. could you help me?
Question by MichelS7 | last reply
Does anyone know what the connection pins are on those 4-Pin XLR power units commonly used for video cameras or camera mounted lights? I know it's 12V 1.2A but I'm not sure which pins are used for what (i.e. pos, neg, 0V, +12V) I want to turn a normal adapter into one with a 4Pin XLR connector to be used with a camera light.
Topic by mrshow555 | last reply
Hi, I got a DVD Player at an auction, in fully working condition, for $10. So, since I already had one, I decided to remove the insides, and extract the laser diode within. I did so, expecting to have just a normal 50-200mw 3-pin red diode. Instead, I have a 4-pin diode, of unknown wavelength, color, and power. Would anyone happen to have a pinout for it? The pins are arranged as below in the picture.
Topic by metrogdor22 | last reply
Alright, So I know the basics about resistors and what-not, but as I was buying beginner supplies, I noticed there were resistors in OHMs and Watts, What's the difference between the two? And like, can the unit Watt be transfered into OHMs? And which one would I use when my general area of working would be around basic LED work and noob stuff like that xD?
Question by E D E N | last reply
I was wondering how long would it take to charge a capacitor at 5volts if there are 4 parallel. This is the details on the Capacitors. 330v 120uF each. So what is the best way to charge them by usb which gives me 5v or using a 9 volt battery and for how long.
Question by Kante Tech | last reply
I want a very deep Bass as i am getting in my logitech z103...(image attached) I am plannin' to build a sealed 10" cube outta 0.5" thick Plywood and put in em two 4" subwoofer drivers. will i be getting the thing i want???? if not what should be the dimensions???? THnaks in advance!!!
Question by adarshnarsaria | last reply
Right now I have an arduino (power being supplied by a 9v battery) controlling 4 servos (using 4 digital pins). The servos are connected to a breadboard and are acquiring power from four AA batteries (essentially a 6v battery). However, I cannot figure out how much current the motors are drawing, nor how long these batteries will last. I don't know if the robot I'm building should use AA, C, or D batteries. The image is a rough representation of what I have right now (except the four batteries I have are all in one pack). Any help would be greatly appreciated!
Question by JustinK97 | last reply
Dear All I have an old printer HP Laserjet 4 model C2001A (please see photo) and have a problem when installation it to my computer windows 7 ultimate .Because I cannot found my model C2001A on list of (INSTALL THE PRINTER DRIVER) before and after UPDATE. So please help me to know what I can do for get rid of this problem, I hope you understand my question and help me Thank you very much Best regards lam
Question by lam | last reply
I want to build an offroad/all terrain mobility vehicle and have simultaneous motor control using an Arduino, raspberry Pi, or similar mini board. I have very limited mobility and want to enjoy the outdoors more. Can this be done? I have 24volt motors, but not sure yet as to the watts.M
Question by poppaIT | last reply
I have an old mobile phone with a 4 terminal battery the end terminals are labelled "-" and "+" but the middle ones are labelled as "CF" alongside negative terminal and "VF" labelled alongside positive terminal. what do these two terms mean and why are they there? battery is 350mAh 3.7V battery. i dont have a multimeter but i checked the resistances between terminals (using an LED) as terminals LED brightness Remarks + & - (more than normal brightness ) no resistance + & VF ( normal brightness) some resistance + &CF; (less bright ) more resistance in the image from top to bottom alongside golden color terminals labelling is as - (in picture as P-) CF VF + (in picture as P+)
Question by MYawar | last reply
I will be wiring Four 3.3V 20mA UV LEDs for a project I am working on. This project involves using a computer's power supply to power several different components. My idea was to power the four LEDs with the orange 3.3V cable from the power supply in parallel skipping the 1ohm resistors. Does this seem like a sound idea or am I missing something here?
Question by dcaballero | last reply
So I am making a deadmau5 helmet and i want to add 4 LEDs to the inside. I was wondering how i would set this up and what kind of power supply I would need such as 4AA batteries or that. The LEDs need to be able to be flipped off by an SPST switch and they should be able to run for around 3 hours before switching the batteries out(more if possible describe as many possible ways as you can). I only really plan to go to radioshack and visuals are my preferred resource here because electrical components are not my cup of tea. Here is the link to the LED http://www.radioshack.com/product/index.jsp?productId=2062551 P.S. I'm kinda new to circuitry so I may ask for further clarification.
Question by anthonyv4 | last reply
I am a total beginner, having logged about one hour here (the last hour). Does this sound OK for a first Arduino project? I want to sample and log the temperature outside at the surface and at depth for a total of 4 readings to a depth of around 50cm (20"). The reason is to consider if I should provide my daughter's pet rabbits with an underground burrow as relief against the next heat wave. It seems a nicer option than running a swamp cooler all day. Though I suppose I could use an Arduino + LM35 to turn on and off the swamp cooler :) It looks like I can do it with 4 x LM35s, an Arduino One, some sort of data storage, a 9v battery and a bread board. Any recommendations for if I should use WiFi or an SD card for storage? My guess is the SD card is simpler to programme and maybe less of a battery drain. It seems I just need to hook up the data out of the LM35s to the analogue ports, then loop over the inputs and write the outputs to a file somewhere. And calibration too. Any pointers on how to turn the LM35s into probes that can be buried in the ground? I was thinking I could bind all the probes onto a dowel, dig a hole and bury it. How to extend the LM35 pin outs? Thanks in advance for any suggestions.
Question by FargingIcehole | last reply
My supplies A Tweeter with a frequency response of 20 KHz ~ 40 KHz, 8Ohms, 75Watts RMS/3000Watts Max, and Sensitivity of 105dB. A 4” Subwoofer with frequency response of 25Hz ~ 160Hz, 4Ohms and 25 Watts RMS Two 4” Full Range Speakers of 4Ohms and 5 Watt RMS Is the schematic mentioned in the pic is a suitable xover for my system please clear the nearest values to me
Question by subhamsingh236 | last reply
Im a n00b, bought a red ringed 360 from a friend for cheap.
With my mind on something else I very very stupidly(i KNOW I KNOW)put my almost brand new iPhone 4 into the washing machine. Its been drying for 3 and a half days but still wont turn on. My new plan is to put it in rice,leave it in the airing cupboard overnight and try plugging it into my laptop in the morning. Any other advice?
Question by samijo | last reply
I have a LM7805 voltage regulator hooked up to a saltwater battery that outputs 16 volts, and the output is either slightly above or below 4. When I wire it to a 9v battery, it outputs a steady 4.98, but still will not power a USB port
Question by D5quar3 | last reply
My supplies A Tweeter with a frequency response of 20 KHz ~ 40 KHz, 8Ohms, 75Watts RMS/3000Watts Max, and Sensitivity of 105dB. A 4” Subwoofer with frequency response of 25Hz ~ 160Hz, 4Ohms and 25 Watts RMS Two 4” Full Range Speakers of 4Ohms and 5 Watt RMS Is the schematic mentioned in the pic is a suitable xover for my system please clear the nearest values to me Thanks in Advance
Question by adarshnarsaria | last reply
Hello, I'm trying to design a switch box to switch between 4 different ethernet sources and output to one cable. I've checked around and believe I have developed a way to do it, but I am unable to find a switch that uses 4 smaller independent switches. The concept seems pretty straight forward but I don't want to use 16 switches. Please let me know if there is a switch which controls 4 independent connections or if there is a better way that I'm over looking. I look forward to your input! Best Regards, Zach G
Topic by lossofworth | last reply
I got a 4 axis joystick that i want to hock up to 2 motors, so when i push it forward both motors turn in one direction (the same for backwards) and when i push to one of the side the motors will turn different ways? can anyone make a schematic?
Question by mberg86 | last reply
I would like to control 4 LED lights in my house over the internet with arduino uno, ethernet shield and my android phone. All they need to be is on/off outputs. I really could use allot of help. I am new to using the arduino over the internet.
Question by slowguy | last reply
I want to convert 12 v ac to 12v dc i have a transformer to step down 220v(my mains voltage) to 12vac now i want to use 4 ini4007 to convert that voltage to a stable 12v dc is it possible Thanks
Question by TheGreatResistor | last reply
I have a question about chaining 4 shift registers together.I am going to be sending data to four shift registers and my question is this, when all four are loaded and latched if I send more data is it possible to only send data to the first register in the chain without the others losing their values?
Topic by mbcharney | last reply
I have got 4 3.7v 6000mAh lithium ion batteries connected in series with 2 batteries holders. I would like to charge them without taking them out (prefer to seal a unit). Anyone know how to do this (I could connect the 4 "cells" individually to separate input/outputs.)? Also have 19v 3.16A power supply available to use also for charging (Batteries are for making it portable and plug for the 19v) Have this ordered if it is useful: 4-Cell Li-ion Li-Po Lithium Battery 18650 Charger Protection Board Help appreciated
Question by bonze77 | last reply
I am having troubles splitting my antenna to 4 T.V's, all digital, ( set top boxes inside ). As you can see in the image, I have split the antenna 4 times, all the 3 TV's inside the house are working, but the external shed cannot pick up a signal. ( Shed in green ) It seems to almost pick up a station when scanning for channels, but they are still hidden behind blur, distortion and ants running over the screen. No channels pick up after scan is complete. The cable was dug underground through conduit sleeve to the shed from the splitter. The red "Mains" cable is about half a meter away from the aerial conduit line. Is this a problem? Am I needing a mast amplifier? Or a "Booster" somewhere? Help would be much appreciated, thank you.
Question by AtomRat | last reply
For christmas I got a 4 channel GT-3386 helicopter. After battling it with my brothers hellicopter snapped the guards off the side fan and now it is unstabe. I could not find a spare part but after watching a review on my helicopter he called it a Z008 instead of GT-3386. So I searched online that number and found I could get spare parts that looked the same. Would Z008 parts fit on a GT-3386 helicpoter? or at least the side fan guards.
Question by David97
Hi, This is a follow up of this question- https://www.instructables.com/answers/Logic-circuit-to-generate-and-convert-3-bits-paral/ I set all the 10 inputs of the encoder high and was expecting to see all the 4 outputs give a high(4 LEDs were connected to the outputs to see this happen).But that wasn't the case and just 2 of the LEDs glowed.I tried different configurations on the inputs but all the time it was either these two LEDs that glowed or none .Can this ic power 4 LEDs directly from its outputs? Could I have wrecked the ic? Something a bit off the topic- What should I keep in mind while mixing TTL and CMOS logic gates? I powered the ic with 5 volts.
Question by Adarsh_tronix | last reply