Embedded control: A microcontroller would not typically be used in which of the following applications?

Introduction / Context:
Microcontrollers integrate a CPU, memory, and peripherals on one chip for embedded control tasks. They are ubiquitous in consumer electronics and automobiles. This question checks recognition of where such embedded control is not typically necessary.

Given Data / Assumptions:

• Typical microcontroller roles: sensing, timing, control loops, user interfaces.
• Devices requiring programmable logic, timing, and I/O are candidates.
• We compare modern electronic systems to a traditional mechanical timepiece.

Concept / Approach:
VCRs, ignition systems, and antilock brakes all require precise control and real-time decision making, making microcontrollers ideal. A traditional grandfather clock operates mechanically using weights, pendulums, and escapements and does not require electronics. While a modernized clock could use one, the conventional example is mechanical and thus the best choice.

Step-by-Step Solution:

Verification / Alternative check:
Automotive ECUs and ABS controllers are standard microcontroller applications; consumer video devices have long used embedded controllers.

Why Other Options Are Wrong:
VCR: needs motor control, display driving, and user input handling.

automobile ignition system: requires precise timing and sensor input processing.

antilock brakes: closed-loop control with sensors and actuators.

Common Pitfalls:
Assuming any clock is electronic. The term “grandfather clock” generally refers to a mechanical longcase clock.

Final Answer:
grandfather clock