---
step: 1
description: Some soldering tips
---

Here some soldering tips before starting building the variometer.

First **always check the component's placement after soldering the first pin**. Once two pins of the component are soldered is become very difficult to move or desolder it. So always solder in three steps :

1. Solder just **one** pin
{% include tutoimg.md name="stip1.JPG" %}
{% include tutoimg.md name="stip2.JPG" %}

2. Check the component's placement. If it seems not good, heat the solder again while replacing it.
{% include tutoimg.md name="stip3.JPG" %}

3. When the placement is perfect you can solder the other pins.
{% include tutoimg.md name="stip4.JPG" %}

Next **don't hesitate to heat the solder sufficiently**. The components used in this tutorial are not very temperature sensitive. And making good quality soldering is determinant. I advise soldering each pin in two steps :

1. Apply just a little amount of solder to make contact between the two parts.
2. Heat the solder again **at least 2 seconds** before applying the right amount of solder.

Pay particular attention to ground plane connections like this :
{% include tutoimg.md name="groundpin.JPEG" %}
They are very difficult to heat due to the high temperature dissipation. Don't hesitate to let the soldering iron until 10 seconds.

Finally pay attention that **all the soldering in the center of the board need to be as flat as possible**. This is needed to avoid damaging the LiPo battery placed just under the PCB :
{% include tutoimg.md name="batterypcb.JPG" %}