Since I have delayed our discussion of magnetism, HW5 is delayed from this Friday (30 Sept) until next Wednesday (5 Oct).
In today's lab (and the last part of lecture) we investigated a comparator-based relaxation oscillator. You will probably want to read over how it works a few times to make sure you get your head around it - it is a bit subtle. The important thing is not so much that the circuit oscillates, or that we can make a light blink on and off (we could already do that), it is the general idea of feedback. That is, the circuit is configured in such a way that past output affects present operation, and this allows us to do exceedingly clever things. We'll see this more and more when we discuss op-amps next week.
In today's lab (and the last part of lecture) we investigated a comparator-based relaxation oscillator. You will probably want to read over how it works a few times to make sure you get your head around it - it is a bit subtle. The important thing is not so much that the circuit oscillates, or that we can make a light blink on and off (we could already do that), it is the general idea of feedback. That is, the circuit is configured in such a way that past output affects present operation, and this allows us to do exceedingly clever things. We'll see this more and more when we discuss op-amps next week.
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