Temperature-controlled soldering stations are now readily available in the market. Such instruments use thermocouples or thermistors as temperature sensors. But even if it’s available in markets it’s fun and experience to build this device yourself. An electronics hobbyist would surely like to build this unit to enhance the working life of his soldering iron bit and to save power. With a basic knowledge of comparators, this circuit “Temperature controlled soldering iron station” is very easy to understand. Transistor T1 BC107 is used here as a temperature sensor. The fact that…
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