May 272015
 

Soldering Iron temperature controller circuit

You can buy a Soldering Iron temperature controller system with many features, but here we want to give a circuit for you to do it yourself.

Soldering Iron - Soldering iron temperature controller

The Soldering iron

A soldering iron is an instrument used to repair and assemble electronic circuits. This instrument works, most of the time, connected to the outlet (110/220 VAC). This causes a constant energy consumption.

In addition to this consumption, it also causes deterioration of the soldering tip. One way to avoid these problems is to connect between the soldering iron and the power source (electrical outlet or similar), a circuit that regulates the temperature of the soldering iron.

Soldering Iron Temperature Controller

The circuit shown can vary the temperature of the soldering iron from 0° degrees to its maximum value, thus regulating the heat dissipation.

How the soldering iron temperature controller works?

The set of components: potentiometer R1, resistor R2 and the capacitor C1, vary the trigger angle and thus the time the TRIAC go into conduction. The DIAC can trigger the TRIAC in both directions (both positive and negative half cycle of the voltage wave). Handling the potentiometer R1, we vary the temperature of the soldering iron.

This circuit can be put in a small metal box. Place the pot so that it can be easily handled from the outside. (As a volume control)

List of components for the soldering iron temperature controller

1  2.2K resistor
1  100k Potentiometer
1  0.1uF, 400V capacitor
1  DB3 DIAC
1  BT136 TRIAC
1  heat sink to the TRIAC

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