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Intermediate
Automation and boards
Relays: time, phase, thermal
Time, phase-monitoring, latching, photocell and thermal relays. 7 questions.
Question 1 / 7
What is a latching (impulse) relay for?
So any number of plain push-buttons can control one light, with no two-way switches
So the light comes on only after dark
So the light switches itself off after a minute
So a motor starts smoothly
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