user40096: I want to make a project similar to this Turn Signal Biking Jacket
. 
But, instead of using Arduino Lilypad I want to use an 8 pin attiny13A-SH and want to use one electret microphone instead of the buttons. 
I want to use led's only for the left, right and a stop indicator(on the back, i don't want the leds on the sides like the instructable project). 
According to me, the leds require 1 pin each and will share a common gnd(that's 4 pins). 
The microphone will require 1 additional pin, with 1 going to the gnd (5 pins). 
And I might require 2 pins for the power outlet (6 pins out of 8). 
Now, i am a newbie in all this stuff so i don't want to go about experimenting with the chips. I am ready to disable the reset pin cause i wont require the chip again. I have got a couple of instructable's to help me in the programming and set-up plan(though they have used Arduino Uno or Lilypad), so I only want to know if it is possible to make the project with the attiny13a chip without the requirement of any additional parts.
Also, as an alternative, i wanted to use these leds instead of the lilypad led's, so i want to know if i can do the model in exactly the same way without using any mofsets etc(i just want 6 leds on each side). I'm extremely sorry for my horrible drawing(First time and no correct tools. used paint!) 
ANY HELP IS APPRECIATED.

user4143: 
want to use 1 electret microphone instead of the buttons.

In what way do you want to use the microphone? You do realise, don't you, that an Arduino can't understand speech (or much of anything really) without powerful extra hardware? A microphone by itself is pretty much useless, especially without any form of preamp and signal conditioning.

i only want to know if it is possible to make the project with the attiny13a chip without the requirement of any additional parts.

No, it's not possible. You will require lots more parts. You can't just take an arbitrary chip and connect it to a battery and expect it to work properly. You need to consider correct supply voltages (voltage regulation or boosting depending on your power source), decoupling capacitors, drive circuitry, amplification, signal processing, etc...

i wanted to use these leds instead of the lilypad led's, so i want to know if i can do the model in exactly the same way without using any mofsets etc

Again, no.  Those are 12V LED strips. You need both a 12V supply (and the associated regulation down to 5V to power the ATTiny etc) and MOSFETs (or something similar) to allow the ATTiny to switch that 12V to the LED strips as needed.

40096: <p>I want to make a project similar to this <a href="http://www.instructables.com/id/turn-signal-biking-jacket/" rel="nofollow noreferrer">Turn Signal Biking Jacket</a></p>

<p><a href="https://i.stack.imgur.com/SPvLk.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/SPvLk.jpg" alt="Turn Signal Biking Jacket"></a>. </p>

<p>But, instead of using Arduino Lilypad I want to use an 8 pin <a href="http://www.microchip.com/wwwproducts/en/ATtiny13A" rel="nofollow noreferrer">attiny13A-SH</a> and want to use one <a href="https://www.sparkfun.com/products/8635" rel="nofollow noreferrer">electret microphone</a> instead of the buttons. </p>

<p>I want to use led's only for the left, right and a stop indicator(on the back, i don't want the leds on the sides like the instructable project). </p>

<p>According to me, the leds require 1 pin each and will share a common gnd(that's 4 pins). </p>

<p>The microphone will require 1 additional pin, with 1 going to the gnd (5 pins). </p>

<p>And I might require 2 pins for the power outlet (6 pins out of 8). </p>

<p>Now, i am a newbie in all this stuff so i don't want to go about experimenting with the chips. I am ready to disable the reset pin cause i wont require the chip again. I have got a couple of instructable's to help me in the programming and set-up plan(though they have used Arduino Uno or Lilypad), so <strong>I only want to know if it is possible to make the project with the attiny13a chip without the requirement of any additional parts.</strong></p>

<p>Also, as an alternative, i wanted to use <a href="https://www.aliexpress.com/item/0-5M-1M-2835-SMD-RGB-Led-Strip-Light-60Leds-M-DC-12V-Non-Waterproof-Kitchen/32767999594.html?spm=2114.search0204.3.16.6df854bcWWLDT1&amp;ws_ab_test=searchweb0_0,searchweb201602_3_10152_10151_10065_10344_10068_10342_10343_10340_10341_10084_10083_10618_10307_5711211_5722315_10313_10059_10534_100031_10629_10103_10626_10625_10624_10623_10622_10621_10620_10142,searchweb201603_2,ppcSwitch_5_ppcChannel&amp;algo_expid=6432d851-7fac-4c64-9ee5-6d40405fbdc9-2&amp;algo_pvid=6432d851-7fac-4c64-9ee5-6d40405fbdc9&amp;priceBeautifyAB=0" rel="nofollow noreferrer">these leds</a> instead of the lilypad led's, so i want to know if i can do the model in exactly the same way without using any mofsets etc(i just want 6 leds on each side). I'm extremely sorry for my horrible drawing(First time and no correct tools. used paint!)<a href="https://i.stack.imgur.com/a9uvd.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/a9uvd.png" alt="enter image description here"></a> <br>
<strong>ANY HELP IS APPRECIATED.</strong></p>
 4143: <blockquote>
  <p>want to use 1 electret microphone instead of the buttons.</p>
</blockquote>

<p>In what way do you want to use the microphone? You do realise, don't you, that an Arduino can't understand speech (or much of anything really) without powerful extra hardware? A microphone by itself is pretty much useless, especially without any form of preamp and signal conditioning.</p>

<blockquote>
  <p>i only want to know if it is possible to make the project with the attiny13a chip without the requirement of any additional parts.</p>
</blockquote>

<p>No, it's not possible. You will require lots more parts. You can't just take an arbitrary chip and connect it to a battery and expect it to work properly. You need to consider correct supply voltages (voltage regulation or boosting depending on your power source), decoupling capacitors, drive circuitry, amplification, signal processing, etc...</p>

<blockquote>
  <p>i wanted to use these leds instead of the lilypad led's, so i want to know if i can do the model in exactly the same way without using any mofsets etc</p>
</blockquote>

<p>Again, no.  Those are 12V LED strips. You need both a 12V supply (and the associated regulation down to 5V to power the ATTiny etc) and MOSFETs (or something similar) to allow the ATTiny to switch that 12V to the LED strips as needed.</p>
