people also ask：
baike
mobile
I ASK
QuesHub APP
QuesHub > light > light > light > ASK DETAIL

How do the street lights work 2024?

Amelia Lee | 2023-04-20 17:43:09 | page views：1487
I'll answer
Earn 20 gold coins for an accepted answer.20 Earn 20 gold coins for an accepted answer.
40more
Best Answer | Search More answer on queshub>>

Isabella Davis

Studied at the University of Amsterdam, Lives in Amsterdam, Netherlands.
So when light shines on the photocell, it turns the transistor on, which energizes the relay's electromagnet, which turns the light off. When it is dark, the photocell has high resistance, so no current flows through the base and the relay is not activated -- the light is on.
2023-04-21 17:43:09
评论(499) Helpful(122)

Oliver Gonzalez

QuesHub.com delivers expert answers and knowledge to you.
So when light shines on the photocell, it turns the transistor on, which energizes the relay's electromagnet, which turns the light off. When it is dark, the photocell has high resistance, so no current flows through the base and the relay is not activated -- the light is on.
How do the streetlights turn on automatically at night? | HowStuffWorks
ORG URL>>
首页 上一页 1 NEXT  LAST
  • 0
    0
    2
    3
    4
    5
    6
    7
    8
    9
    0
    1
    2
    3
    4
    5
    6
    7
    8
    9
  • 0
    1
    2
    3
    4
    5
    6
    7
    8
    9
    0
    1
    2
    3
    4
    5
    6
    7
    8
    9
  • 0
    1
    2
    3
    4
    5
    6
    7
    8
    9
    0
    1
    2
    3
    4
    5
    6
    7
    8
    9
  • 0
    1
    2
    3
    4
    5
    6
    7
    8
    9
    0
    1
    2
    3
    4
    5
    6
    7
    8
    9
  • 0
    1
    2
    3
    4
    5
    6
    7
    8
    9
    0
    1
    2
    3
    4
    5
    6
    7
    8
    9
  • 0
    1
    2
    3
    4
    5
    6
    7
    8
    9
    0
    1
    2
    3
    4
    5
    6
    7
    8
    9
  • 0
    1
    2
    3
    4
    5
    6
    7
    8
    9
    0
    1
    2
    3
    4
    5
    6
    7
    8
    9
  • 0
    1
    2
    3
    4
    5
    6
    7
    8
    9
    0
    1
    2
    3
    4
    5
    6
    7
    8
    3

people are using QuesHub for answers.

Me Too.
RunTime:0.8306 || DBTime : 0

HOT TOPIC

ask:3,asku:1,askr:137,askz:21,askd:152,RedisW:0askR:3,askD：0 mz:hit,askU:0,askT:0askA:4