patrick panikulam

I just swapped one of the tweeters with a piezoelectric tweeter . The other one is the same as in the supply list . I have mentioned why I did this in the introduction and also among one of the comments .The different tweeter I used is just a low cost automobile tweeter which is awailable almost in any automobile accessories shop . So you won't have any trouble finding those Thankyou:)

Thankyou so much :-)

Thankyou :-)

Not sure about the current drawn .But I am getting 4 to 6 hours of play time depending upon the type of music and volume.

The boost converter works on switching principle. So the output actually switches really rapidly , so a capacitor is added to supply energy during this "off" period . They have already provided a small SMD capacitor on the boost module , but is is always a good practice to add an external one with heavy loads The crossover seperates the amplifier output into high and low frequency channels . Which means it has 1 input and 2 outputs . One of the outputs (high frequency) goes to the tweeters and the other (low frequency) goes to the woofers . You could damage the tweeters if the output from the amplifier is directly connected to the tweeters without a crossover or a filter capacitor in between .

Thanks I am from India , so I guess the parts would get really expensive once the shipping charges are added if I order stuff through parts expressAnd yup , first I used 2 magnetic tweeters , but I was not satisfied.So before finally closing everything up ,I just swapped one of the magnetic tweeter with a piezoelectric one . And There was a huge difference . Usually magnetic tweeters are the best , but I don't know what happened in this case , I guess the ones I had was not of good quality.

Thankyou:-)

What about an audio contest or a Bluetooth challenge?

Thankyou :)

Thanks :-)Try buying the components from Aliexpress , It's really cheap there

Only 13 dollars (₹845) .I didn't spend anything for the box . The total cost of all the components is 13 dollars

Thanks :)

Sorry , but that won't work .You can step up the voltage of the battery from 3.7 volt to 12 volt , but the current drawn from the battery is going to be soo High that it could overload and could even damage the batteries .

http://s.aliexpress.com/3m6bABri?fromSns=WhatsAppI used the 3.5 mm audio female Jack from the link above .This jack is connected parallely to the output wires from the audio decoder board which goes into the amplifier inputs . This female Jack is designed in such a way that it cuts off the connection between the audio decoder and amplifier and creates a new connection between the aux cable and amplifier when ever an auxiliary cable is plugged into the female Jack

I don't have much experience with plexy glass cylinder , but once I made a speaker using pringles can with 3" drivers on both sides , but I faced a problem !, As the can was too thin , it resonated with the speakers reducing the overall sound quality of the system. So I would prefer a thick plexy glass tube which will stay rigid and not resonate with the speakers, I am not sure but i think it's thickness should be more than 6 mm

Great job!! , just wondering ,how does it perform when compared to the real Bose sound link mini?

You are welcome :)

This is the design i made before the built,

What you said was exactly my plan , the passive radiator on the back was intended just for the woofers but once I started the built and tested the circuit I figured out that I needed one more battery in parallel to give sufficient current and it took up a lot of space inside.It was impossible to line up all the components inside to add a partition because of limited space and wide batteries

Hi there, can you tell me more about the power supply you used?, It's voltage and currentIf it's smps or transformer based?

Bro , that's neat , great work :)

Thanks :)I used two 16 volt 1000uf capacitor for each dc to dc stepup module outputs and one 4700uf capacitor parallel to the battery, the size usually doesn't matter much but the voltage should be above 6 VoltI added the second switch as a power saving feature , it can be used to deactivate one of the amplifiers,. The speaker still sounds amazing just with full range speakers and tweeters when the speakers on the sides are switched off .If you are planning to build one , I would recommend you use high quality 18650 batteries in parallel which has higer current handling capabilities

Thanks, Glad I already did that before connecting the batteries in parallel. I fully charged both the batteries to 4.2 Volt using the charging module before parallel connection . Guess the battery are safe, :):)

Thanks :)

:-)

Thanks :)I tried it with single high mah battery first , but it didn't have the sufficient current eventhough it had a huge capacity( maybe because of the internal resistance) . But it's working perfectly once I used two smaller batteries in parallel. Both the batteries have their own built in charge, discharge and current protection circuit which I think will protect the batteries to an extent.Can you suggest me any alternatives for parallel battery protection?

I have added the links to the partsThe total cost I guess would be around $25 (₹1600) , but it came out cheaper for me as I didn't had to spend money on the box and the mini woofers

Thanks :-) :-)By the way, the radio alarm clock u made is just awesome

Thanks :-) :-)

http://s.aliexpress.com/je2MzuQZThey supply it to India, but it takes a month

Thanks:)Haha, okay:-) i will be more careful with the jigsaw ;), .it was difficult to drill a hole exactly through the middle of the 5 mm board with the board fixed in a position, so I did it by hands for small adjustments

HAHA, they can shake your table for sure ;) All i had to spend on the whole thing was ₹1400, it came out this cheap as i ordered most of the components from aliexpress , in aliexpress the amplifier board costs only ₹19 each, dc step up ₹30 and the charging module ₹14, yup its that cheap but you should have the patience to wait for a month of delivery time. I found everything required to make the box in the basement, so i didnt had to spend anything for that.The main reason i made it is because making things is my hobby ,i have been building things from 6th grade, Its much cheaper to build one and you can like do any design and modification that comes to your mind and you can show off your creativity too.if the circuit is made by hand, its going to be very bulky and there is on...

HAHA, they can shake your table for sure ;) All i had to spend on the whole thing was ₹1400, it came out this cheap as i ordered most of the components from aliexpress , in aliexpress the amplifier board costs only ₹19 each, dc step up ₹30 and the charging module ₹14, yup its that cheap but you should have the patience to wait for a month of delivery time. I found everything required to make the box in the basement, so i didnt had to spend anything for that.The main reason i made it is because making things is my hobby ,i have been building things from 6th grade, Its much cheaper to build one and you can like do any design and modification that comes to your mind and you can show off your creativity too.if the circuit is made by hand, its going to be very bulky and there is only limited space inside the box. And when i found that the modules are this cheap ,i went for it.

It reduces the distortion in high volume

Oh, I just added up the speakers wattages , 3+3+10+10,. Sorry if I am Wrong

I ordered it from AliExpress , it costs ₹178 only,. It took about 20 days to reach me from China here is the link http://s.aliexpress.com/ZbANJNrq

Thanks :-)

I used a 2 inch 3 watt 4 ohms miniwoofer which I already had with me http://s.aliexpress.com/IBzeiYz2You can also use the 5 watt or 10 watt once which are also awailable http://s.aliexpress.com/6RniyaY7 Thankyou :)

Thanks :)

thanks :)

Offcourse it has a mic in it , you can clearly see the opening for the mic in the picture of the module I have posted in materials required list in the instructible, you can even see the word "mic" written under that opening if you look closely.Here is the link , you can check it out if you don't believe mehttps://www.amazon.in/dp/B071YVRZV9/ref=cm_sw_r_wa_awdb_kpbTzb4V50V1BAs for violating traffic rules, there are plenty of these kinds of helmets already awailable in the market , the expensive ones with intercom,GPS, Bluetooth and all, here is the link to some of them http://badasshelmetstore.com/top-5-bluetooth-motorcycle-helmets-and-other-communication-options/

Haha nice, I have made something similar , check it out

thanks

done:)

here ,i removed the speaker just to show you the opening, now take a long hard look, does it look like i made that opening? huh , does it?, are you still saying that the helmet didnt a have a opening there already?.I have no reason to lie here, if i had cut the padding i have no problem saying it in public.Most helmets have a V shapped padding which is removable for washing purposes,so i found a headphone speaker which fits into that V, now if you think i lied about the V shaped padding take a look in this link http://shop.vegahelmet.com/c/accessories_replacements-parts_liners_v-tune

;)

:-)

Oh thanks, so that solves the IC burnout due to accidental short-circuits ryt, i will attach one immediate imidiately

Thanks for the advice, I will do it for sure :)