Why do numbers in digital clocks jiggle when we chew something crunchy?
The digits are multiplexed. That means that each is driven in turn at high brightness for 1/6 of the time. Then the next one is turned on and so forth.
The Short Answer
The digits are multiplexed. That means that each is driven in turn at high brightness for 1/6 of the time. Then the next one is turned on and so forth. It isn't normally noticed but sudden movement causes the on/off cycles to be noticed as your eyes get a slightly different image position each time. Multiplexing is used to reduce the wiring needed. Without multiplexing, you would need 6×7 or 42 signals to drive the display. (six digits and seven segments/digit). With multiplexing only 6+7 or 13 signals are needed.
Analysis
Key Concepts: Multiplexing, digits, time
This explanation focuses on multiplexing, digits, time and spans 88 words across 8 sentences. The depth is typical for Technology questions (category average: 75 words), striking a balance between accessibility and completeness.
What This Answer Covers
The explanation opens with: “The digits are multiplexed.” It then elaborates by presenting a contrasting perspective, ultimately building toward a complete picture across 8 connected points.
How This Compares in Technology
Ranked #169 of 500 Technology questions by answer depth (top 35%). This falls in the detailed tier — above average depth. The explanation goes beyond surface-level but keeps things accessible.
Frequently Asked Questions
Is there a simple explanation for why numbers in digital clocks jiggle when we chew something crunchy?
The digits are multiplexed. That means that each is driven in turn at high brightness for 1/6 of the time. Then the next one is turned on and so forth. It isn't normally noticed but sudden movement causes the on/off cycles to be noticed as your eyes…
How detailed is this explanation compared to similar Technology questions?
This is an above-average answer at 88 words, ranked #169 of 500 Technology questions by depth. The key concepts covered are multiplexing, digits, time.
What approach does this answer take to explain numbers in digital clocks jiggle when we chew something crun?
The explanation uses root cause analysis and contrasting perspectives across 88 words. It is categorized under Technology and addresses the question through 2 analytical lenses.