Logic And Electrical Engineering – Practice Problems Set 2
逻辑和电子工程-练习题2
The figure below is part of a circuit that is used to turn on the parking lights of a car automatically when it is dark. A switch is included so that when it is OPEN, as shown in the diagram, the automatic system will be deactivated (turned OFF). A Light Dependant Resistor (LDR) is used as an input device to control the circuit.
下图是电路的一部分，用于在黑暗时自动打开汽车的停车灯。包括一个开关，当其打开时，如图所示，自动系统将停用（关闭）。光相关电阻器（LDR）用作控制电路的输入设备。
Car Parking Light Circuit 汽车停车灯电路
The truth table for this circuit is shown below. One row has already been completed.
该电路的真值表如下所示。其中一列已给出。
| LDR (Logic @ A) | Switch (Logic @ B) | Parking Lights | Relay (Logic @ Q) |
| Light 1 | Open ___ | OFF | 0 |
| Light 1 | Closed ___ | ______ | ___ |
| Dark 0 | Open ___ | ______ | ___ |
| Dark 0 | Closed ___ | ______ | ___ |
- Complete the truth table for the car parking light circuit shown above.
完成上述汽车停车灯电路的真值表。- Complete columns 1 and 2 to show the logic at levels A and B
完成第1列和第2列，以显示级别A和B的逻辑 - Complete column 3 to show when the parking light should be ON or OFF
完成第3栏，以显示停车灯何时应亮起或熄灭 - Complete column 4 to show the corresponding logic at level Q
完成第4列，以显示级别Q的相应逻辑
- Complete columns 1 and 2 to show the logic at levels A and B
- Complete the following logic statement by inserting 0 or 1 where appropriate:
通过在适当的位置插入0或1来完成以下逻辑语句：- The lamp will be ON when the input A is _____ and the input B is ______.
当输入A为_______且输入B为_______时，指示灯亮。
- The lamp will be ON when the input A is _____ and the input B is ______.
- On the figure shown above, indicate where an AND and a NOT gate would be inserted between points A,B, and Q to complete the circuit.
在上图中，在点A、B和Q之间插入AND和NOT门的位置以完成电路。 - What is meant by the term SPST?
SPST一词是什么意思？ - Describe how a SPST toggle switch works.
描述SPST切换开关是如何工作的。 - Why would you want a toggle switch rather than a push switch for this circuit?
为什么此电路使用拨动开关而不是按钮开关？ - Describe how a Light Dependant Resistor (LDR) works.
描述光相关电阻器（LDR）的工作原理。 - What is a relay switch and how dose it work?
什么是继电器开关？它是如何工作的？ - Explain how this circuit works.
解释此电路是如何工作的。
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