How could I make my own sound modules like those in greeting cards and toys? And preferably easily, and cheaply.
Question by Zem | last reply
Hi I am new on here, and am looking into making a bluetooth speaker/ radio/usb sd reader. i have attached a picture of the module i would like to use. I am wondering if any one has used this product or similar and if the have any help or advice it would be greatly appreciated. The board will be run off a 12v dc battery, and i am hoping to connect it to 2 mid range drivers and 2 tweeters. I have tried to find a simple wiring diagram with no luck. Just after any advice on what i would need to purchase alongside the board with regards to electrical connectors, cross overs, capacitors, a separate amplifier board perhaps? Many thanks in advance. Jon
Topic by wiseboy5 | last reply
So I ruined my second laser diode in a row, and I am just sick of trying to solder on to these tiny leads. I get these things off ebay, and I think they just scavenge them out of broken Bluray burners or something, because the leads on them are tiiiiny. So instead, I think I will just buy a laser module. I found a pretty good 250mw blue one on ebay for 53 bucks. Does anybody know a dedicated hobby website though? One that might have better prices? I don't need a laser pointer, because I already have my own circuit set up and stuff. Any thoughts?
Topic by thedonquixotic | last reply
About four years ago I bought this robot voice kit for a halloween costume: http://www.kemo-electronic.de/en/Hobby-School/B107-Robot-voice.php (the scematics are near the bottom of the data sheet) I never finished it and now that I put it together it's not working. The signal goes through to the amplifier, but without the modulating happening. Does anyone know what the problem could be, or if there is a way to narrow it down without desoldering and testing the components individually? Thanks
Topic by Jur | last reply
Alright, i know now that there is a way to modulate your voice from putting signal in on the voltage pin of a transistor, and controlling it with a synth into the input voltage. But now, what is that effect? and what is a way to smooth out or get clean sounds from it? Any help is appreciated. Thank you.
Question by ski4jesus | last reply
You need a separate grouping for this module under Technology This is a Microprocessor running at 80Mhz to 160 Mhz with 512 kB to 4 Mb of program memory It costs $3 and is programmed with various languages compiled to machine hex and uploaded by a variety of programs to run entirely on its own with a 3.3Volt power supply . It connects to your modem , acts as a modem , serves web pages and sends to web pages and a whole lot of other stuff I have not used yet See here in the wiki for more detail http://www.esp8266.com/wiki/doku.php
Topic by tytower | last reply
Hello!! I am planning several Halloween props that will benefit bigly from sound effects. For instance...I'm working on a mantel version of the demonic grandfather clock in Disney's Haunted Mansion. It would be awesome to have the sound of the ominous ticking, backed with a chime, that the "real" clock has. This could be an audio loop of just a few seconds. Some of the other parts of my scheme would be enhanced with short loops of sound effects or mood music...a minute or two at most. I don't have a background in electronics, but I can follow directions. Any advice on constructing a few, small sound effects modules? Thanks!!
Topic by Purple Chez | last reply
Hey guys, recently i brought a brushed motor quadcopter which came with a mini recording camera, i would like to connect it to my TS5823 32CH 200mW Video transmitter, but the camera don't have any wire that i can directly connect to my VTX, do anyone have any idea / schematic on how to connect the camera to my VTX ? Thanks a lot.
Topic by Sooncheng | last reply
I'm working on a project with peltier coolers. I want to get it as cold as I can. What would be my optimum power source? Amps over volts? If it helps I am planning to hardwire the device. and I'll have plenty of room for mounting fans on the hot sides heatsink Here are the specs 50mm x 50mm x 3.64mm 245 - 320 Watts of cooling power Operates from 0-15 volts DC and 0-26 amps Operates from -60 deg C to +180 deg C Thanks
Topic by curve12 | last reply
There is a 8 pins connector with no indication at all :-(
Question by rastactivist | last reply
Hi, MODI is our new product. For easy understanding about our product, MODI is an easy version of Arduino. You can just connect modules with a magnetic connector. In addition, we provide a coding software tool to make a complex movement, so it is available to make IOT devices, DIY, and toys. Can check on Kickstarter page Thanks
Topic by luxrobo
Hi all is there an easy way to speed up a standard clock module part (please see attached JPG picture). - would like it to turn 3 times faster. - can add any extra external circuit - can increase the voltage i.e. 2 x AA instead of one i know v. little about electronics. Also important to know how this will affect the power consumption.... thanks
Question by oem_odm | last reply
Is it possible to purchase a gps transmitter chip (smallest possible battery) and have it "upload" its locations in real time on google maps? chip and power source should be as small and thin as possible to fit in envelopes or packages.
Question by chienb | last reply
Would love a 3v relay module that can be drive by PIRs that output 3v signal. Thought I finally found what I needed on Ebay, but discovered this is a bogus product that actually needs 5v to be driven. http://www.ebay.com/itm/5PCS-3V-3-3V-Relay-High-Level-Driver-Module-optocouple-Relay-Module-for-Arduino-/331413255692?hash=item4d29c4f60c:g:6koAAOSwfcVUDuEJ Buyer Beware. Advertised relay PCB as 3v relay. While the relay on the board may trigger independently with only 3 volts, the circuitry of the board demands a higher voltage to trigger the relay. Relay PCB has a EL817 opto-coupler for the input signal, it requires a 5V drive voltage on the Input in order to drive the onboard transistor which controls the relay coil current. With only a 3v drive, there is insufficient current to drive the opto and transistor. The module that the relay is mounted to is falsely advertised as 3.0V because the components on the board need more than 3 volts. In order to drive this relay with a 3v signal device, voltage level shifting needs to take place between 3v device and relay PCB.
Topic by DiyWaterDog | last reply
I have an mp3 player module whch i took out from a home theatre main unit. I want to know the use of some features or the pins which are given in it because i am a beginner to electronics and stuff. I am using it as a player using headphones because it needs amplifier to play in speakers, but headphones work with medium sound. It has usb and sd card port for input. Also have 3 pushbuttons , play pause, next , previous. It has the following pinouts. Basic ones which I know: +5v GND L_OUT R_OUT These must be for pushbuttons: P4.1 GND P4.2 P1.2 P4.4 (but there are only 3 buttons)??? IR (this could be infrared remote control) These I want to know what are for??? +5v GND SDA SCL P5.7 RST
Question by akki5230 | last reply
Please Provide instructions in details
Question by timzzziii | last reply
I purchase a CP2102 Voice Record chip and i cant find the datasheet also i purchase a ICSH030A to go with it i dont know if those chips will "take" the amps they need or just burt out Here are the boards : https://www.tanotis.com/products/tanotis-cp2102-4-channel-voice-record-playback-module-voice-recording-module-new http://www.newegg.com/Product/Product.aspx?Item=9SIA86V2Z32044
Question by NivA2 | last reply
I want to know the arduino program for controlling 2 motors using rf module.i am using a arduino duemilanove & motor driver shield
Question by harish.rahman.75 | last reply
So I have a 5mw laser diode module that I am trying to get open so that I can install a 250 mw diode in its place. Problem is, the diode won't come out, the manufacturer glued it in, and I keep buying new modules from different sellers only to find inexplicably the stupid diode backing slathered in glue. Is there a way of getting this thing out? I don't care if the diode is broken, I don't need it, but I want the driver intact.
Topic by thedonquixotic | last reply
Hello, I bought those items: L298 Module Kit, PIC16F877A + KIT, a stepper motor my friend found in an old printer (with four wires (2 coils)), and the pic programmer. I am lost trying to find out how to wire this thing. Can someone tell me how to connect the L298 Module with the Pic kit and the basics of how to program it (not code just the concept). I already connected the stepper motor to the coil pins of the module. Thanks
Question by Seifpic | last reply
I am trying to understand how TEC modules work, and I think I have it figured out now, but was hoping that someone with more electrical knowledge could verify that I have it right. I am looking at this TEC module. My current understanding of this is as follows: 1. If I regulate the current to this module to a max of 2A, the maximum amount of heat that the module will move at DTmax = 0 would be approximately 75W. 2. If I regulate the current to this module to a max of 2A, the module will not exceed a DT of ~20C. 3. If I regulate the current to this module to a max of 2A, the voltage could range between ~4-6V, but would not reach 10V due to the limitation of DT. 4. Therefore, this module, limited to a max of 2A, would use at max 12W (approximately). Is that all correct? Second, I am comparing the above module to this TEC module. For this second model, my understanding is: 1. If I regulate the voltage to this module to a max of 12V, the maximum amount of heat that the module will move at DTmax = 0 would be 28W. 2. If I regulate the voltage to this module to a max of 12V, the module will reach its DTmax of 67C (theoretically). 3. If I regulate the voltage to this module to a max of 12V, the current could range between ~0.75-1A, but would not reach 2A due to the limitation on voltage. 4. Therefore, this module, limited to a max of 12V, would use at max 12W (approximately). So basically, it is a trade-off between DTmax and heat moved at the same wattage. Is that correct?
Question by eblingdp | last reply
Hey Guys, has any of you experience with the voice recognitions module. I need help to program it!! I watched the tutorial but I could not program my module. There they said I had to write AA11 to start program the first group. In the tutorial the program write start, again,.... I did all the same, but it did not come start. Can me help someone??
Topic by Hansta98 | last reply
I have a problem with my bluetooth module. I have interfaced it with my arduino board and it was working properly, but now all of a sudden it is not working at all. The led which ensures that it is turned on is not blinking neither my cell phone is searching it. Please help me to find out t he exact problem as i want to be sure before buying another module.
Question by tnagchandi | last reply
Hi i was wanting to know if it was at all possible to power a recording module that you would find in a recordable birthday card via USB as i am making a wall-e and would like the sound setup to be powered by the same usb connection as the rest of my Wall-e Hub. any advice would be greatly appreciated. best regards.
Question by MonkeyBoy191 | last reply
Hi guys! I have a doubt regarding modulation process, more specifically regarding the spectrum. I understand the spectrum of sinusoidal signals, the amplitude or energy is concentrated at a particular frequency, say Fm, and hence the delta functions. But why is the spectrum of the unmodulated message(original) signal always displayed only in the shape of triangle? I have been going nuts over this question. I have attached the images just in case
Topic by charmquark | last reply
Hello I'm having some problems finding the correct modules. I'am trying to incorporate some radio's into some peltor headset's that i have. I want to be able to talk ( like a phone call ) without the push to talk button.. Is this possible? can i use RF? Or do I need to use bluetooth?
Question by Xyphion. | last reply
Hi I'm doing some experiments with an fm transmitter. Now, instead of transmitting and modulating audio, I wanna try to feed the base of transistor using a ramp generated by a NE555. I ended up with this schematic http://s30.postimg.org/pbe0oyu4x/base_sawtooth_modulation.png , would be ok to pass the signal on the base using a 220 ohm resistor and a 10nF capacitor? I suspect that I have to increase the value of the resistor R5. kind regards.
Question by akopelumenuscu | last reply
There is a serial Bluetooth module that I have used before on an Arduino project but now I'm trying to use in a project without the Arduino. Basically I need it to be an electronic trigger, I don't care really what the signal is just how long and the voltage and current. There are 4 pins on the module: Vcc, GND, Tx, and Rx. There are 2 open pads: Key and State. When I send a command from my phone the module sends a signal out the Tx pin, and it is this signal I would like to measure so I can pick a command with an appropriate signal and tailor the rest of the circuit accordingly. I tried a voltmeter between Tx and GND but saw no signal on any level measuring DC. Is there something I'm missing? Is the signal more complex or different, or is that test setup flawed? I tried other combinations, Rx-GND, Tx-Rx, RX-Tx, GND-Tx, GND-Rx but saw nothing.
Question by bwrussell | last reply
Can you guys help me pls.I don't know how to power servos.My projects use an ultrasonic sensor with a few servos.when i try to power it up only 1 module that works.Can i power the servos using a different power source?like a power bank
Topic by Alexander heron the inventor | last reply
Is any GPS module that supports Rinex (receiver independant format) output for post processing of phase or pseudo codes ? i need to log binary observation data of these modules then change their format to RINEX that can be post process for precise coordinate calculations.?
Question by gzamir
I was making a laser trip wire, but I was looking online for diodes which I found, by which one would be best to get, I dont care for the color, in fact I am better off with red and the intensity can not put off heat to harm anyone. Anyone have any laser diode recommendations or have a site that I can buy them from?
Topic by bprins | last reply
Has anyone used a 16 Channel 12V Relay Module Interface Board For Arduino PIC ARM DSP PLC? I want to use it to control some solenoids but I have no idea how to do so, I'm looking for a schematic and a code example. I'm a total programming noob. I want to connect it to an arduino duemilanove. http://www.ebay.ca/itm/New-16-Channel-12V-Relay-Module-Interface-Board-Arduino-PIC-ARM-DSP-PLC-/170745300786?pt=LH_DefaultDomain_0&hash;=item27c1368732#ht_4131wt_1398
Question by gradof6b | last reply
Calling all you that know and enjoy making circuits. Here is my problem. This is too bulky of a solution with a relay switch and 12v battery pack. https://www.instructables.com/id/DC-Low-Voltage-LIght-Sensor-Switch/ What I would like is a 9 volt input and 9 volt output. Actually, whatever the input should equal output. So if I connect 3 v battery, I want 3 v output. Right now I need 9 volt in = 9 volt out. No Relays!!! Simple and clean circuit board only. The LED can't be soldered to the board. I need the capability of extending from the board with wire to adapt to my needed projects. On another note, if you know of something already on the market, please send a link. I will be happy to make the purchase. OH... no modules that need a microcontroller. Need a stand alone module. Thanks! Looking forward to hearing back soon. The Water Dog
Topic by DiyWaterDog | last reply
Any ideas on how to use a DC INPUT MODULE FOR PROGRAMMABLE CONTROLLER that will otherwise go in the garbage? It just didn't have it's factory seal so was written off. It's an Allen Brad 1746-ib16 and I'd hate to see it go to waste...?
Question by Golftester | last reply
I recently salveged an LCD display module from a smashed Canon all-in-one printer. So far, I have been unable to search up any information on it. The manufacturer seems to be "APEX" (see fifth picture), and the circuit board has a backwards "RU" mark. Any ideas as to how to talk to it, possibly with an Arduino? If, as I suspect, the module is an OEM part, and datasheets are not available, do you have any recommendations as to how I could try to experimentally determine what the contacts do? (I got it for free, so It's not too critical if I destroy it...) Thanks! - Infinitevortex
Question by Infinitevortex | last reply
I'm looking for a breakout board, module, etc that is basically a 40kHz ultrasonic receiver, where if it detect a 40kHz signal it puts a pin high sort of thing (volume level as a PWM whatever, I just need to know when there is a 40kHz signal near by). I was thinking of using a HC-SR04 Ultrasonic Range Finder but they only receive for a very short time after the trigger pin goes high, I need it to constantly be sensing.Ideally works with a Raspberry Pi (ie 3.3 volts output, but 5v just means I add a voltage divider not a biggie)Thanks
Question by Duke Nukem
I am looking to build a device that can communicate with a phone and through that phone you could turn on or off a light or a siren with fairly long range 20 to 30 meters (60 to 90 feet). Would anyone be able to help regarding this device. I am looking for it be as small as possible. also i wanted this device to run with fairly low voltage dc power source. please help with this thanks
Topic by sam501 | last reply
So I've been looking at this esp8266 wifi module, which seems to be a popular toy for Arduino users. I myself am one of those Arduino users and so I bought a couple of these to play around with. So far they work great with the Arduino, but I read somewhere, I think it was make.com, that these modules can actually be programmed to be used without the Arduino or other external microcontrollers. I simply wondered if this was in fact true, since I can't seem to find any evidence of it being done. If it is true, does anyone know of any good tutorials or instructions on how to do it? I just want to be able to turn on and off a single LED via wifi without using an Arduino or other external microcontroller. Any tips, links, suggestions would be very welcome. Thanks ~Dudes
Topic by dudes | last reply