Home Electronics and DIY Electronic Project: DIY Audio Level Indicator

Electronic Project: DIY Audio Level Indicator

by Nikodem Bartnik

We have had a blast completing this project last time using the Arduino board. Today, This DIY kit will help us achieve the same result in a completely different way.

Here is a small volume meter for us to play with today.

audio level indicator

Besides the parts, you will also need these tools:

  • A Soldering iron
  • A Tin
  • A Vase
  • Tweezers
  • A wire cutter

Here is what you can find in the kit:

audio level indicator
  • LEDs
  • A PCB
  • Capacitors
  • Resistors
  • KA2284 module
  • Cables
  • Connectors
  • A Potentiometer

Turn on your soldering iron, and let it heat up.

Here is our PCB (Printed Circuit Board)

audio level indicator

Everything is perfectly labeled on the board. There are even values for the components.

The first components that we will put in place are capacitors and resistors because they are the smallest.

Be careful connecting the capacitors since we have both of them with different values and double check their capacity before connecting.

audio level indicator

To make soldering simpler you can put your PCB upside down in a vise.

audio level indicator

Gently solder all of the legs, and when you are satisfied, cut out the legs of the components.

audio level indicator

Put KA2284 in place and make sure that the bevel on its size matches the sign on the PCB.

audio level indicator

Before soldering it, let’s put all of the LEDs on on the board. Remember that the longer leg of the LED is the + and shorter is the -. As you can see last, the LED is labeled as Red.

audio level indicator
audio level indicator

Solder, cut out longer legs of the components.

audio level indicator

There are the last 3 components we need to solder: the potentiometer and two connectors for power and signal input.

audio level indicator

You will also need to add a jack plug to connect it to your phone or some kind of music device.

audio level indicator

The other socket is used for power input. You can use voltages between 3.5V up to 12V.

audio level indicator

Hope it worked. Enjoy!

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