The first components you will need while assembling RESISTRON are resistors.

First, take off the paper packaging placed on both ends of the resistors.

Now, you should gently bend them in the shape of the letter U, but be careful because they could break easily.

Place them as shown in the photo:

After you solder all resistors, take one more look at the solder joints to ensure there are no cold joints.

Take out your cutter pliers. You will use them for cutting off the excess legs of your resistors.

Do not point the legs upwards when cutting them! They might fly away and hurt someone!

Take the variable resistor, place it in the middle of RESISTRON, and let’s solder it.

Make sure not to bridge the pins since the upper ones are close to each other!

Now, let’s take the red LEDs and put them in RESISTRON’s eyes.

We need to watch out for the polarity of the LEDs, or they won’t work.

The shorter leg of the LEDs should face the center of RESISTRON’s head like this:

Let's solder the LEDs you put in.

Once again, make sure that there are no cold joints or bridging.

If everything seems okay, take the pliers, and cut the rest of the LED's legs off as you did with the resistor's legs.

Place the battery holder like this: 

Now, turn RESISTRON around, and let's solder the two pins of the battery holder.

Please turn off your soldering iron by unplugging it from the power outlet. Leave it on the soldering iron stand for at least five minutes so it cools off before you put it away.

If you need help with cleaning the tip of your soldering iron, please check our video tutorial.

Now you can put the coin cell battery into the battery holder!

Check the photo: