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Three-light Logic Tester Pen High-low Level Measurement Computer Motherboard Repair Detection Tool Instrument
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CNY ¥ 35.0 ≈ $ 4.8
Real-time USD to CNY exchange rate:7.2562
International shipping not included
Model:
LP-1 logic pen
Quantity:
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逻辑笔

 
逻辑笔是采用不同颜色的指示灯为表示数字电平的高低的仪器.它是测量数字电路子种较简便的工具.
使用逻辑笔可快速测量出数字电路中有故障的芯片.逻辑笔上一般有二三只信号指示灯,红灯一般表示高电平,
绿灯一般表示低电平.黄灯表示所测信号为脉冲信号。
 
逻辑笔一般有两个用于指示逻辑状态的发光二极管,性能较好的还有第3个,用于提供以下4种逻辑状态指示。
 
(1)绿色发光二极管亮时,表示逻辑低电位。
 
(2)红色发光二极管亮时,表示逻辑高电位。
 
(3)黄色发光二极管亮时,表示浮空或三态门的高阻抗状态。
 
(4)如果红、绿、黄三色发光二极管同时闪烁,则表示有脉冲信号存在。
 
逻辑笔的电源取自于被测电路。测试时,将逻辑笔的电源夹子夹到被测电路的任一电源点,另一个夹子夹到被测电路的公共接地端。
逻辑笔与被测电路的连接除了可以为逻辑笔提供接地外,还能改善电路灵敏度及提高被测电路的抗干扰能力
 
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