Issue 270: EQ Answers

The answers to the Circuit Cellar 270 Engineering Quotient are now available. The problems and answers are listed below. Problem 1: Given a microprocessor that has hardware support for just one level of priority for interrupts, is it possible to … Continue reading

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Issue 268: EQ Answers

Problem 1: A transformer’s windings, when measured individually (all other windings disconnected), have a certain amount of inductance. If you have a 1:1 transformer (both windings have the same inductance) and connect the windings in series, what value of inductance … Continue reading

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Issue 266: EQ Answers

EQ

The answers to the Circuit Cellar 266 (July 2012) Engineering Quotient are now available. The problems and answers are listed below. Problem 1—What’s the key difference between infinite impulse response (IIR) and finite impulse response (FIR) digital filters? Answer 1—An … Continue reading

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Issue 264: EQ Answers

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The answers to the Circuit Cellar 264 (July) Engineering Quotient are now available. The problems and answers are listed below, along with a schematic. Problem 1a—Is it possible to transmit on-off (DC) signals between two pieces of equipment in both … Continue reading

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Issue 262: EQ Answers

Problem 1—The classic two-transistor astable multivibrator is shown below. Typically, R2 and R3 have at least 10 times the value of R1 and R4. This circuit oscillates, with Q1 and Q2 turning on alternately. From the point in time in … Continue reading

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