Temperature-Controlled Fan Using BJT

Simple temperature-activated fan control circuit. This is a project to cool electrical devices when their temperature rises. Main Features: The fan is connected between the collector and the positive source, and the emitter is connected to the negative source. What happens is that no current flows through the circuit unless there is current at the base. This is where the thermistor comes in. The thermistor is of the NTC type. As the temperature increases, its resistance decreases, and more current flows through it. the more current passes, the faster the fan runs. So, the fan runs faster as the temperature increases. What can we learn from this project? For example In computers or laptops, when the processors are under pressure, they heat up and need more cooling depending on the intensity of the heat. This is where this project comes in. As the temperature of the processor increases, the fan speed increases, providing better cooling. Of course, I have talked about one application, but in reality, the project has many practical applications. you can see the project explained on youtube >> https://youtu.be/do99BR8ERoE