Question 5.13: Figure 5-22b is a continuity tester. After you turn off all ...

Electronic Principles

Figure 5-22b is a continuity tester. After you turn off all the power in a circuit under test, you can use this circuit to check for the continuity of cables, connectors, and switches. How much LED current is there if the series resistance is 470 Ω?

5.22b

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