Hello all,
I m about to start a DIY project with the MK103 sound to light unit and i had some questions

I am fairly new to electronic DIY but i want to use the MK103 with over 80 leds at the same time.
basically instead of having 4 led light up with the sound i want over 80 to do so.
How should i proceed?
any help would be appreciated, as i say i am new to this type of DIY.

 

There are lots of ways to do it. You need to start by telling us the specifications for the 80 LEDs and what you have in mind for a power supply.

Read Bill's LED circuit blog. http://forum.allaboutcircuits.com/blog.php?b=378

 

Replace the LEDs with an N-channel Mosfet. Connect a 1k resistor to ground from the gate of the Mosfet to turn it off. The Mosfet can drive many LEDs connected in strings. Each string will have a few LEDs in series and in series with a current-limiting resistor.
The strings of LEDs will need a power supply to provide enough current.