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Northern IrelandTechnology and DesignQuick questions
AS 1 Electronic and Microelectronic Systems
Quick questions on Timing and the 555 timer: RC time constant, monostable and astable - CCEA A-Level Technology and Design
3short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is q1?Show answer
State the formula for the time constant of a resistor-capacitor circuit. [1 mark]
What is q2?Show answer
A 555 monostable has R = 47 kilohm and C = 22 microfarad. Find the output pulse length. [2 marks]
What is q3?Show answer
Which 555 mode would you use to flash an LED continuously, and why? [2 marks]
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