how Connect Sparkfun BT to a BT bracelet?

Well i trying to connect betwen Sparkfun Blue Smirft BT and a BT bracelte, here is the Bracelet that i am using: http://www.ebay.com/itm/Bluetooth-Call-Vibrate-Alert-Anti-lost-Alarm-Bracelet-Bracelets-for-Mobile-Phone-/121729821122 I can discover the bracelet but once i try to connect its returns "connect failed", the BT itself is working. i made successfully connection between my Android phone and bracelet and also i can connect between two Sparkfun BT.  thanks for help. i hope i wrote it in the right spot :P.

Question by RioC2   |  last reply


BT TM-7

I recently heard about the new BT TM-7. First thoughts were price and when it comes out. It is basically a invert mini in milslim form. Great for me though thinking about getting a mini to play woodsball with! (LOL). All in all i want to now your thoughts and opinions about this marker and if you know the price.

Topic by potofgold   |  last reply


In-car arduino BT remote -> Iphone

Hi, I am considering a project in creating input buttons to send requests to my iPhone so that on Spotify I can change track forward and back, start and stop the track, and hopefully use spotify SDK to display track name on an LCD screen (not essential). As far as I am aware for this I would need a bluetooth module for Arduino and i already have an LCD screen with combined input buttons (tell me if anything else might be required). I have tried understanding this article - https://davidfindlay.org/weblog/files/2009_09_07_ipod_remote.php - but a lot of the stuff goes over my head because I am a programming/arduino/electronics simpleton/beginner - does anyone know of some simple ways I might be able to send requests to my Iphone to be interpreted by Spotify? Thanks in advance

Topic by Tech10007 


How to replace BT Headphone Batteries?

Hi, I own an Alcatroz Airwave 300 for 6 months and I have issues with battery. I always use it when I got home from school, doing homeworks, doing household chores, even going out to the public. I always charged it until its full but they only last for 2 1/2 hours. Recently, I noticed that my battery discharges easily. It doesn't last for 5 mins. So I decided to open the headphone where the battery and bluetooth module was installed, then the battery inflated and exploded. I was lucky that i'm not hurt but then I had no money to replace those. The warranty on this thing voided so I got no choice but to replace it. One day, I was looking for a potential replace for my headphones then I found my old nokia. It's display was damaged but the battery is still good. After 6 years of owning it, I can't believe that my Nokia battery still runs good as new. I thought to myself "why not". Also there is another problem, I don't even know how to solder a simple wire. I have the basic equipment so I need your thoughts and advice including how to do it.Note: before the battery exploded. I lost my receipt after I puchased it, without it, then I have no free warranty. Plus these thing were the last of its batch ever sold as a bluetooth portable headphone.

Topic by MikoT7   |  last reply


i want to get on Smashbeats.com at school, bt they have blocked it. Can some1 help me get around it somehow???

I want to get on Smashbeats.com at school, bt they have blocked it. Can some1 help me get around it somehow???

Question by RIPKeithWade51310   |  last reply



Broken Sony Ericsson BT headset. Need DIY charger.

Hi Guys, Need some advice please. I have this old BT earpiece sans a charger. I could buy one but trying to do it myself if I can. Not able to figure it out yet. Any suggestions?

Question by Dave7V   |  last reply


converting bluetooth headset to bluetooth vibrator. tbut when the headset is connected we cant talk with phone itself?

I want to convert BT headset to BT bracelet vibrator. the problem is when the headset is connected to phone we cant talk with phone itself? is there a way to talk with phone mic and speaker when BT headset is connected?

Question by pooyan   |  last reply


Can i use 800mah or max battery to BT receiver instead of 70mah battery?

Hi, BT receiver require 70mah inbuild battery to run, but due to low backup i want to replace it to max one, It have 3.6 v inbuild battery maybe, can i use another one Will it run smoothly?

Question by MannuH   |  last reply


Motorcycle communication without expensive BT headsets!

When it comes to communicating with the person on your back seat then often there is no need for a fancy BT headset.Unless of course you are constaly driving on freeways at high speed and love to talk ;)The most annoying thing though is when you want to go for a long ride with a lot of your mates.Some might already have some BT headset, most might not have anything to communicate.Even with just 8 or 10 riders in your group, loosing one is easy.The most advanced headsets now offer functions for automatic pairing when the connection was lost - they come at a price though.Around here there is two problems to face when going for long rides.a) communication range for the riders in the group.b) cellphone coverage is usually non existing when you actually need it.So why not go with something totally different and much cheaper than BT headsets?At highway speeds the range of BT headsets suffers not just from the required safety distance between riders but also from the spped itself.Cheap headsets just crap out all the time, expensive one tend to loose the connections quite often.Wouldn't it be great to have more than the average 800 meters of good sound quality without dropouts?And if you ever tried to have a decent converstation with another at high speeds you already know that even the best BT headsets struggle with the wind noise unless you have a really optimised helmet (and paid a lot for it).The alternative, if we trust all the hype and advertsiements would be to go for the latest generation of headsets out there....Baofeng UV-5 series....This type of UHF/VHF handheld radio has ben around for years.It is not only quite cheap but also able to put a full 4W out.So called battery eliminators to power them directly from a 12V socket (in your car) are cheap as well, but a good battery should last for a few hours.The benefit of these cheap radios however is not that they are so cheap.It is that you can actually program whatever frequency you like for your needs.Of course you should stick to the frequencies and channels that are free and legal to use in your area.The since is about what a pack of smokes is, so no problem to mount it descreetly on your dash or handlebars either.Being a radio there is no need for pairing or making sure you stick to the correct order when doing things.If you want to be "alone" on a channel you can even use celectcall and other option to make sure only those radios with the right callsigns wil open your squelch.Quite nice if you suddenly get into an area where your channel is used by ther people.Ok, a handheld radio might work, but what about the antenna?The UV5 series usually ships with two antennas.A short stubby that is good for about 1-2km - line of sight.And a small external antenna with a magnetic base.On a bigger bike it is often no problem to add a 15x15cm plate behind the seat that the antenna can pop on to.Should only be required if your require a bigger distance though.And why would a UHF radio be any better with the background or wind noise?Biggest problem with these expensive BT headsets is that you need to get really creative if you want to change the speakers or microphone.And options are quite limited here again - either a flexible microphone or a glue on one.Neither is really good once the wind gets too much.For the UV5 series you get so called throat microphones for under 10 bucks.Often advertised as tacticle headsets but for the price nowhere near the quality of a military grade combination.They plug straight into the handheld and come with an external push button that can be used to start a manual transmission.But of course you can automate this on the UV5 as well by selecting the voice activation mode in the menu.Set the level so high that you need a slightly rised voice to start the transmission.(That way not everyone needs to hear you swearing about other drivers if you keep it quite ;) )All up a solution like this will cost you well under $100, with all required extras.For a bit more you can also get UHF radios for helmet use.Basically the same like the handheld option, but smaller, a bit more convient to use and set up but also very limited in range and battery life.

Topic by Downunder35m   |  last reply


What is the best route to adding a USB power source to a guitar amplifier?

My girlfriend has a Fishman Loudbox Mini amp which has a 3.5mm auxiliary input on the back. She bought a cheapo bluetooth audio receiver that is powered by USB and outputs through its own 3.5mm jack. It works great but it takes up two wall outlets, and drastically reduces the distance it can be from the wall due to a short audio cable. So I need an easier power source for the USB dongle. I had imagined a coupler that would sit between the amp and its power cable. I could frankenstein a USB-wall-outlet connector into this coupler to provide a USB power source close to the aux input. However it may be easier to find a 5V source inside the amp and just add a usb port. I'm not sure, which is why I'm creating this post.

Question by Nameless37   |  last reply


arduino bt and LM34 temperature help with code

I have an issue i hope someone can help me with. i have an arduino bt and would like to use 3 LM 34 temperature sensors. I have found code for one of these sensors and works well. My problem is with code...i don't know any. I would like to add 2 more of these same sensors and have them print out like the current program that someone has written, i have posted the code below.// Define which analog input pin we have connected to the temperature sensor#define TEMP_SENSOR_PIN 0#define ANALOG_VOTLAGE_REFERENCE 5void setup() {Serial.begin(115200);}void loop() {// prints the currrent temperature with 2 place after the decimal pointprintFloat(getTemperature(), 2);// print a carriage returnSerial.println();// rest 1000 millisecondsdelay(1000);}float CtoF(float c) {return ((c -32.0) * 5.0 / 9.0 ) * 9.0 / 5.0 + 32.0 ;}float analogInToDegreesC(int inputValue) {return inputValue / 1023.0 * ANALOG_VOTLAGE_REFERENCE * 100.0;}float getTemperature() {return CtoF(analogInToDegreesC(analogRead(TEMP_SENSOR_PIN)));}void printFloat(float value, int places) {int digit;float tens = 0.1;int tenscount = 0;int i;float tempfloat = value;float d = 0.5;if (value < 0)d *= -1.0;// divide by ten for each decimal placefor (i = 0; i < places; i++)d/= 10.0;// this small addition, combined with truncation will round our values properlytempfloat += d;if (value < 0)tempfloat *= -1.0;while ((tens * 10.0) <= tempfloat) {tens *= 10.0;tenscount += 1;}// write out the negative if neededif (value < 0)Serial.print('-');if (tenscount == 0)Serial.print(0, DEC);for (i=0; i< tenscount; i++) {digit = (int) (tempfloat/tens);Serial.print(digit, DEC);tempfloat = tempfloat - ((float)digit * tens);tens /= 10.0;}// if no places after decimal, stop now and returnif (places <= 0)return;// otherwise, write the point and continue onSerial.print('.');for (i = 0; i < places; i++) {tempfloat *= 10.0;digit = (int) tempfloat;Serial.print(digit,DEC);// once written, subtract off that digittempfloat = tempfloat - (float) digit;}}

Topic by rodgard   |  last reply


Can i use 800Mah battery instead of 80mah in BT Receiver

Hello, I have BT Receiver,  have near abt 3.6v 80mah inbuild battery, Due to low battery backup, i want to change battery, So, can i use 800 or max battery mah instead of 80mah, Will circuit run smoothly, without any problem, If ur(your) answer is no ! Then please tell me any resistor or circuit, which required for smooth output Thanks

Topic by MannuH   |  last reply


How to reduce range on HC-05 BT module to 3 feet only?

I'm trying to design and build a rf shield to encase the hc-05 bluetooth module in order to reduce the range adjustably. For the first use I want to reduce the range to around 3 feet. Any tips?

Question by dmagryta124   |  last reply


by using ardino R3 ,BT module and mpu6050 can we make stable brushed quadcopter?

Sir i want all the instruction of ardino brushed quadcopter .i want make this project in lower budget and i .can i use ardino micro insted of nano? can i use 180 motors?and laptop battery?

Question by AbhiH4   |  last reply


Can an HC-05 Bluetooth module be used as an audio receiver? Answered

Of course there are specific BT audio receivers, but I like to save money.... 

Question by DangerousTim   |  last reply


Stereo Bluetooth Transmitter Transmitter Transmitter Circuit Help

Hey All, I am currently working on a LiPo Battery Adjustable Voltage Battery Pack, that has a headphone amp and bluetooth transmitter built in. I want the user to be able to use any compatible BT Headphones or BT Receiver Dongle. It is for use with metal detectors.  Every time I Google Bluetooth Transmitter Module, I find a bunch. Upon closer inspection, I find they are all receivers (i.e. speaker left out, speaker right out). There are bluetooth dongles that plug into a 3.5mm jack and transmit, but there is a lag in the transmission that I believe stems from the module not being hardwired into the system. A lag in receiving the BEEP means the object is harder to pinpoint, more digging, bigger holes, and frustrated folks. Can anyone recommend a good available BT Transmitter Module that I can hardwire into my system as a test to see if the lag goes away? Any assistance y'all could give would be greatly appreciated! Mike

Topic by gollumses   |  last reply


All in One Keyboard ? Answered

Is it possible to combine all these features in one unit.  i)    Keyboard,  ii)    Touchpad/Trackball,  iii)    FingerPrint Reader,  iv)    Microphone,  v)    Speaker,  vi)    Card Reader,  vii)    IR,BT(optional).

Question by FAisalShafi   |  last reply


Need help

I am using hp laptop.my laptop is not reading a specific internet network by an ethernet cable.But if use a switch near to my laptop it reads bt speed is very low.It has started after a thunderstorm,any solution please???

Question by Mehedi6511   |  last reply


How do u get passed a block at school?

Plz help me. i want to get on smashbeats at school bt the computers blocked it for streaming videos. some1 PLZ PLZ help me get around it

Topic by RIPKeithWade51310   |  last reply


Connect several DIY Bluetooth speakers

Hi peeps, I'm looking for Bluetooth (BT) amplifiers that can sync with a connected music device, for example an phone, so the music played from the phone will be sendt to all speakers. Hope my question are understood, and would greatly appreciate your feedback :)

Question by KayOeS   |  last reply


how can i do all mathemetical calculation for finding effiency of an electrical byke?

M working on the project bt uncapable to find all mathametical work....... pls tell me the formet that find it... what calculation should be required like all stress , how to find c.g.

Question by rathoredinesh   |  last reply


arduino or AVR

Hey!! any one plz tell me which one is better either AVR or arduino .... i wanted to buy arduino ..bt i found one with just 6 pin inputs on stores ,,,i was seeking to make  LED cube of 16 x 16 ... sory have added two questions......plz response

Topic by feebo   |  last reply


Plaster Picture Frames

I nderstand 'GOOD' picture frqames are made of wood with a plaster coveribg, finished with gesso (sp). My thought is to build some using drywall compound as the plaster bt draggibg a metal guide over the wooden base? Am I totally off track OR has anyone had any experience with this. Carpe Ductum

Topic by naic98   |  last reply


How 2 build a simple model car wich runs on c02 produced by d reaction between vinegar n baking soda?bt there is a trick

Hi everyone!!..i hv tis competition cuming soon where we muz build a simple chemical car using cheap materials..d chemicals tad we muz use is 3 molar of 40 ml vinegar n 10 gram of baking soda...d car muz travel at least a distance 5 meters caryying a load of 100ml water ..bt d trick is,there muz NOT be  ANY spillage of water or sodium acetate which r also a by-product of d reaction otr ten co2...so any idea??all suggestions will be welcomed happily!!thx..=D

Question by artemis zoe   |  last reply


please help me with my old uk phonebox modification

I have a old 1989 payphone bought at auction minus the keys I want to convert the old rotary tone dial to a pulse dial keypad and replace the coin slot to accept new coins and would like to do this without ruining the looks of the phone by having to drill out the locks and trying to find a lock of nearly the same style as they have been superseded by new better locks I purchased the coin slot and keypad from a bt approved company in the midlands but understandably both they and bt will not tell me how I can remove the coins once they are in the box incase I break into new boxes coin vaults even though the locks have changed and phone boxes these days are hardly used except for emergency calls.I am trying to put this phone into an oldie worldie village pub as a gimmick to draw in tourists to a dying pub/restaurant

Topic by msc   |  last reply


What kind of code or cipher is this?

I'm working on a puzzle and can't identify the type of code this is.  I'm not looking for somebody to solve it for me, I just want to research it and learn how to solve it myself.  I can't really do that until I know what I'm dealing with and various Google searches have turned up no information of value. This is a small portion of the code and I have no additional information or clues: BT RK RV YC NP GZ YY AA LS HZ NL RR ES IC AN BF RG SS EU VD NF YC SS RH MH MH MH MH MF HN LS HO GY YV UG IC AS GK BT LS HG AD LS HP CV NT There are 95 groups of 2 letters each.  I have tried a couple of things which have not given me any result. I'd really appreciate any kind of information as to what I'm looking at.  Thanks!

Question by iPodGuy   |  last reply


Can i use my USB wireless Keyboard-Mouse Connected to PC using inbuilt WiFi/BT ? (Not to connect Dongle internally

I repair Computers and take interest in getting new Hacks.! I get most of my queries solved from the Site...yet  I was wondering if we can Couple the keyboard/mouse to the inbuilt Bluetooth/ WiFi of Laptop.

Question by koolguyz0521   |  last reply


How can I connect multiple applications on an Arduino?

Basically, I want to control multiple application using a smartphone to an Arduino. If I want to control lightbulb, security camera, garage door, and security sensor, can I use only 1 Arduino or I need 4 Arduinos to connect to 4 applications? Is there a specific Arduino board should I use? Do you recommend of using an Arduino BT since I am connecting it to a smartphone?

Question by yan_deleon   |  last reply


do you no any good websites with a a good touchless tutorail?

hello instructables iv been looking for a way to track objects in visual asic or visual c for a wile now an the best thing i have found is touchless bt now that i can track the markers i dont no how to do anything with them please i need  help

Question by lj123456789 


Could u plz gimme the use of IC CS9370DGP?

1stly i went to purchase the IC MT8870 for dtmf decoder..he gav me dis cs9370DGP nd said disz is new one nd it works like MT8870..bt i got a doubt whether it works vth the circuit built using MT8870..plz kindly gimme some suggestions.. if possibl plz provide me the circuit for mobil control robot using cs9370DGP.. Plzzzzzzzzzzz:(

Question by nav.leo02   |  last reply


My computer has wireless that seems to have shut off overnight. Is there a way to get the internet back?

I use Vista Im using a Belkin Wireless adapter My PC used to have wireless and its now stopped and says it only local access. Ive contacted BT(my internet provider) and they claim its the adapter thats faulty I dont have intimate knowledge of vista yet so if the replies, if any, were put in leymans terms.

Question by    |  last reply


How do I get past the Miracast password screen?

I have a Bros Unite MXV Amlogic S805 Quad Core Android Tv Box Full Loaded Add-ons with Kodi BT Smart Player Streaming Media Player. When I went to use it the other day a Miracast screen came up and ask for a password. I have not set up a password for this and am not able to use my TV box because of it. What do I do to get pass the login screen and use my TV box?

Question by Janice0007   |  last reply


Is it possible to modify a Bluetooth Receiver to use inline microphone of stereo earbuds instead of unit built in mic?

For years I have been using Bluetooth Receivers such as this Sony : https://www.amazon.com/gp/aw/d/B0154G9CYY?psc=1&ref=yo_pop_mb_pd_title# The problem is they all have built in mic which I don't like, I prefer to use the online mic on my wired earbuds headset. So question is if I were to disassemble the bt receiver device and disconnect the built-in mic would it then let me use the inline mic on my on my earbud headset?

Question by laingman 


I have Fingerprint module from old sony laptop... Can anyone help me to get the pin breakouts ?

This fingerprint reader module is from hannstar-j  m.b. which I extracted from a old sony laptop (I dont have SN or model no).  This module has weird type of 10 pin socket connector. Can any1 tell me the pinouts for it....? I want to connect in to my new laptop via USB or PS2. I tried to connect it with same type of connector from BT module but it didn't connect. Please help....

Question by shreyask9   |  last reply


Fake Pokemon GO Pro

Hello! Right now the best practice to hunt pokemon is to just walk and if the phone vibrates, you look. Thant means you have to hold the phone in hand.  I had an idea for a DIY, but no way to execute it. Idea is simple: -motor vibrator from old phone -Arduino -BT module -battery Turn all above into a braclet for your hand  I owuld need an app or something that, whenever phone vibrates, it would send a command over bluetooth to arduino to vibrate. It would need to check for phone vibrate command as the app doesnt give a notification or annything.  Is the ambition too high ? Is this harder to execute than i tought ? 

Topic by compufreek   |  last reply


Trouble understanding audio amplifier schematic Answered

I have been looking at audio amplifier circuits online to use in a small-ish speaker system I am working on. I found the circuit in the image which is a pretty straight forward circuit and has cheap/easy to find parts. My only question is where exactly do I hook the audio input. I am guessing I connect to the .1uf capacitor on the left chip and to the ground, but I don't know. Thanks for your time. the circuit is also here: bp2.blogger.com/_ztWtnthp5tk/RkW7cyJceRI/AAAAAAAAAK0/7-Gi_-bt-ro/s1600-h/circuit-TDA2003+Amplifier+BCL+%28bridge+amplifier%29+18W+for+CAR.jpg

Question by danlab   |  last reply


Bluetooth speaker serial port communication hack?

Hello everyone, Recently I bought BT speaker (chinese to be specific) it is great, and I tried connecting it to my Win7 PC. It is interesting, because instead of audio device it installed two serial ports on my computer. I am wondering if this can be somehow useful. Maybe i can turn off voice notifications in the speaker or other settings. But the problem is I do not know any serial port commands that I can use.  If you know what can be done using this bluetooth serial port please message me or reply in this topic. here is photo of the speaker if it is somehow helpful. Later I can add some photos of thew chips inside if needed.

Topic by kondzio29   |  last reply


Wireless Interface? Answered

Hello, Instructables.      I know it seems like I ask too many questions and post too little ibles, But trust me. I'm working on one right now. And thats why I am here. I am working on a wireless snes controller for PC, and am having problems finding a wireless interface for it. I know theres the XBee, which, being on a limited budget, is off the table. theres Bluetooth, which i have VERY little expirience in, but considering that just makes it sound like it would be fun, and, last but not least, there is InfaRed, which, having recently recieved a IR LED assortment from Electronic Goldmine, might be an option. i will look more into BT, since i do have a bluetooth enable pc anyway.

Question by Krayzi99   |  last reply


Bluetooth relay to control water pumps, lights, etc

Is there an inexpensive way to control a water pump or light or other device needing only to turn on and off by using bluetooth?  What I see in my mind....is either a computer or tablet having a bluetooth sender - either built in or a usb dongle...and, for example, an aquarium water pump with a 3.7 or 5 v relay to turn it on and off coupled with a bluetooth receiver.  The computer or tablet would have an app to control the device - with timer software.  I have seen bt dongles that can be purchased for as little as $2 in bulk...low voltage relays also for cheap.  I envision a "box" about 1cm by 3 cm by 3 cm that a pump or a light could be wired into and costing about $US 5 to make.

Topic by haopengyou   |  last reply


Turtle beach bluetooth headset adapter - convert to USB for PC.

Hi All, Have a desire to adapt the XBA Bluetooth Adapter to use it on PC. I envisage the adapter needing provide power to the outer pins as i doubt the 2.5mm jack powers the BT unit. ~ Option one is to use an XBOX 360 controller and plug it straight into the USB port on my PC, have not tried this but id imagine it would work. ~ Option 2 is create an adapter that has USB on one end and the XBA Bluetooth Adapter on the other, this is where i hope to come across someone with more skills than me that has done it B4. Theory was to just buy a second hand xbox controller and reverse engineer the internals to pass the wires needed and discard the rest. Thanks in advance, Any help would be appreciated.

Topic by ynotjs 


My bluetooth headset speaker uses 3 wires, what gives?

I'm trying to mod my bluetooth headset to give better sound quality and volume.  I disassembled the whole thing, but I noticed something kinda weird.  The speaker on the BT headset has 3 wires coming off of it, instead of the usual 2 that most speakers use.  The 3 wires are: 2 that are of a similar color and are connected to where the magnet of the speaker would sit.  They're not connected to the same spot.  One is connected to the 3 o clock position of the magnet of the speaker, the other is connected to the 9 o clock position.  1 that appears to be connected to the metal speaker housing (I'm assuming is the ground?) Anyone know why this Samsung unit uses 3 wires to power the speaker?

Topic by erikiksaz   |  last reply


please help me out...................

.hiiii,....... hope u r f9. we are planning to build a 4 wheeler battery car. but we need a help for making the chasis. and wch motor vl b helpfull for us, if it work for 10 min also dn it is also more dn enough for us so kindly help us out of dis. we r vry new fr al ds. v r gtng ac motor bt battery is dc wch is used in trucks. v dnt want 2 use invertor in dt so kindly can u suggest any dc motor n can u help us fr gear system please............... v vl b vry thankfull 2 u if u vl help us out of dat plsssss v r hoping alot frm u sir.

Question by mechx   |  last reply


The K-3, Shotgun Internals, and The Failed K-4

Well, I am pretty tight on time at the moment, but the video should explain things pretty well until I can do so here.  here will also be many more pictures of the K-3 and Kinetic Shotgun, but I just need some time for those too. As for the K-4: Everything worked the way it was designed to work, but certain mechanisms (the trigger and the BTS) required a lot of force to function, thus reducing the amount of tension that would be even remotely practical to use on the bow.  It was a good attempt and I have learned a lot from it; things that I will take with me as I move on to bigger and better guns. Here's a video for now, and I will explain everything in depth as soon as I can.  

Topic by Kinetic   |  last reply


Connecting a Sony XB-3 Bluetooth speaker to car stereo?

Hi, first time asking a question here! My gf's birthday is coming up and I wanted to get her something to improve the sound on the stock stereo in her beloved Mistubishi Lancer. I can get an amazing deal on a Sony Extra-Bass Bluetooth speaker, which I imagine SHOULD do the job. But before I go ahead and buy it, I've been trying to  deduce whether or not it would work. The stereo itself in the car does have Bluetooth capabilities, but I cant find any info online regarding the connection of BT speakers to a car stereo system. Anybody know if this would work, ore have suggestions for a better idea? I'm first to admit that I know nothing about car audio connection/installation etc, so ANY help is appreciated! Thanks a lot in advance guys and gals

Question by CollinH14   |  last reply


Instructables at SXSW!

Eric and I will be at SXSW Interactive from March 7-11 in Austin, TX. If you're there too, come find us for some Robot stickers! No table or booth - we're just there to schmooze and have fun. We're bringing some neat toys, like a kinetic chain sculpture and Potenco's human power generator (used with the OLPC).We'll be attending as many of the geek parties as we can; tell us which you'd recommend. Right now the tentative plan is Saturday: Bike Hugger Beer & BBQ, Dorkbot, Opening Party, and one of the afterparties TBD.Sunday: Pre-party, PopSci.com after-party, and the Etsy/Threadless/Timbuk2/Moo People Powered Party.Monday: The Plutopia EFF shindig, Next New Networks party, plus the Facebook party primarily to hear BT.(Any suggestions? We like interesting people, blinky lights, fun art, and dancing to electronic music.)Come see us at the PopSci.com awards after-party on Sunday night, and help us make LED Floaties!

Topic by canida 


Vice CKG Bolt Action Rifle

I haven't posted anything for a few months, and I decided to begin work on something that would blow everyone away.  My goal was to create the most efficient, most power, most versatile mag fed knex rifle ever.  I discovered a way to do that when I came up with the Bullet Transfer System (BTS) that you saw in my BTPA pump action rifle.  However, the BTPA had a several drawbacks.  The first was the size of it.  It was just way too big.  Second was that the ammo it shot was connector ammo, and would start spinning out very quickly.  Last was that the ram barely had any time to accelerate,  as the bullet was placed right above the handle.  I suddenly thought of a design that would solve these problems, quickly drew them out, and began work.  The result was the most efficient, versatile, and powerful mag fed gun ever made, the Vice CKG.  CKG stands for Compact Knex Gun, and I am truly proud if it.  The trigger is a variation of Zak's so I give him credit for that.  So exactly how efficient is this gun?  I was able to get 60+ feet with a string of two #64s with the long range round.  The yellow rods get around 50 feet, only because they spin out after a while, but with two #64s unsharpened yellows can go right through a box from a few feet away.  What's the secret to this incredible efficiency?  First off, the firing pin is a grey rod+a gray connector long, giving it that extra room to accelerate.  Second, the trigger is as far back as possible.  Third, the rods are placed as far away from the ram, giving it time to accelerate.  Finally, the BTS allows the bullet to stay in place with nearly no contact between the bullet and the gun.   THIS IS THE MOST POWERFUL, EFFICIENT, AND VERSATILE MAG FED GUN OUT THERE. (I know that statement may sound a little bold, but I am very confident in saying it) Pros 60+ feet range single shot with two #64s 50 feet range with yellows with two #64s Extremely versatile (perfect for long and close range) Looks great 15 yellow rod mag capacity You will dominate the battlefield Cons Reload time (for me anyways)   This video is a little out of date, I have made some upgrades since it was made/

Topic by Kinetic   |  last reply


Need help about amplifier

I need a help regarding my audio amplifier,I have a Bluetooth amplifier which has a output of 5w max, it used two ht6872 chip(mono). A day ago left channel started to sound wired like it's ecoing(low volume output also). So i thought it is probably bcs of amplifier chip got broken. So i ordered another one , This new one came with ns4160 chip which also has same output. And these two chip has 95% same circuit diagram except ns4160 uses 10k resistor in audio input and ht6872 uses 12k. So if i use replace both old chip(ht6872) with new one(ns4160) and use the same 12k resistor instead of 10k, will this effect my sound out put. Please consider me as a newbie in these things, answers are welcome and also please tell they problem with the sound output I'm facing is because of amplifier chip or something else? ( I checked the bt module sound output, it's totally fine in both channels)Thanks in advance.

Question by Sayan_trex 


BLUETOOTH INTERFACING WITH 8051(AT89C/S51/52) PLZ HELP

Hello guruz, recently i bought n bluetooth UART module (http://robokits.co.in/shop/index.php?main_page=product_info&products;_id=354) RKI 1545 I tried interfacing it with 8051 using the 10,11 pin UART pins, using SCON register(mode1) baud rate 9600. But there is no reception or transmission. However the bt module is working fine. Passed the loop feedback test(joined theRx to Tx pin of module standalone....link established echo received on Putty on WIN7 and blueterm android app )   CODE: #include void ini()     // Initialize Timer 1 for serial communication { TMOD=0x20;  //Timer1, mode 2, baud rate 9600 bps TH1=0XFD; SCON=0x51; TR1=1; } void recieve()  //Function to receive serial data { unsigned char value; while(RI==0); value=SBUF; P1=value; RI=0; } void transmit()  // Funtion to transmit serial data { P2=0xF4; SBUF=P2; while(TI==0); TI=0; SBUF=P1; while(TI==0); TI=0; } void main() { while(1) {   ini();   recieve();   transmit(); } }

Topic by skumar112   |  last reply


Is it possible/can anyone explain how to transmit a USB signal through an "Ethernet over power" system.

OK, so we have seen "Ethernet over power" devices. In my home there is one with the "BT Vision" (its a UK thing). But I was wondering, does the input protocol of the signal in, allow you to send your own signal? I can understand if it can only send discreet digital signals, so analogue is probably out of the question. I'm sure you are all wondering what I mean. Well although my idea is for something completely different, involving a camera, and a mains powered reloading BB gun, I will appeal to the SPY cam enthusiasts, who are often very clever with lots of ingenuity. So you somehow manage to secrete a Spy-cam in somebodies stereo. How do you access the video? well there are 2 ways. one is to store is locally, this is limited by how bigger storage you can afford, and the limit of the device. The ones I know are normally limited at 4GB or so.  The other way is to use my suggested way, locate the AC input of the Stereo, implant the AC part of the "Ethernet over power" onto it, then plug the USB device into the Ethernet part.(probably with some kind of mods). Then at the computer in question, connect the output to your computer, there is bound to be a 5v supply inside the stereo, but if not, there are plenty of 5v regulators available. what does the community think?

Question by evildoctorbluetooth   |  last reply