Feasibility with an 8051 microcontroller A centigrade (Celsius) thermometer and a PWM motor speed-control circuit can both be implemented using the 8051 platform. Choose the correct statement.

Introduction / Context:
The 8051 microcontroller is a general purpose 8-bit platform widely used in embedded control. By interfacing sensors and using timers, it can implement a variety of applications. This question tests conceptual understanding of system level feasibility rather than exact circuit values, focusing on a Celsius thermometer and PWM speed control.

Given Data / Assumptions:

• 8051 core with I/O ports, timers, and interrupts.
• Temperature sensor provides an analog or digital signal that can be read through a suitable interface.
• PWM generation can be achieved through timers or software toggling.

Concept / Approach:

For temperature, a sensor such as LM35 or a digital sensor can be interfaced. If the sensor is analog, an external ADC is used because the classic 8051 lacks an internal ADC. For PWM, the 8051 timers can generate periodic toggles at desired duty cycles to control motor speed via a driver stage such as a MOSFET and an appropriate power supply.

Step-by-Step Solution:

Verification / Alternative check:

Simulations or bench tests confirm that temperature readings match known references and that PWM varies motor speed smoothly. Numerous reference designs demonstrate both tasks on 8051 derivatives.

Why Other Options Are Wrong:

False: both applications are achievable with proper interfacing.

Only PWM or only temperature: each ignores the flexible I/O and timer capabilities of 8051 plus simple external components.

Common Pitfalls:

Neglecting the need for level shifting, ADC resolution, sensor calibration, and proper motor driver design.

Final Answer:

True