Exercise 1: Humidity detector We propose to study the assembly of figure 1 which allows the ignition of a red diode from a certain percentage of humidity in the air detected by a sensor. The assembly elements are: VDD=3V, R₁=1ks, R₂=1000, R3=27002. Diode D₁: VSD1=1.2V, RSD1=12 2. Transistor T₁: B=100, Vcesat 0.2V and its base VST1=0.6V, RST1=1k2. The value of the resistor RH depend on the air humidity's percentage (noted X) following the relation RH=30X; where RH is in 2 and X in %. In all numerical applications, we will suppose that B+1ß. VDD is referenced to ground.. R₁ RH R₂ Capteur d'humidité Thevenin IBI VBEI R₂ LED rouge VDD Figure1: D. ICI T₁ VCEI VEI 1. Determine the expressions of the elements of the equivalent Thevenin generator (indicated on the figure) according to VDD, R₁, R₂ and RH. 2. Taking into account the operation of the transistor, give the expression of the current flowing through the resistor R3 as a function of IB1.

Exercise 1: Humidity detector We propose to study the assembly of figure 1 which allows the ignition of a red diode from a certain percentage of humidity in the air detected by a sensor. The assembly elements are: VDD=3V, R₁=1ks, R₂=1000, R3=27002. Diode D₁: VSD1=1.2V, RSD1=12 2. Transistor T₁: B=100, Vcesat 0.2V and its base VST1=0.6V, RST1=1k2. The value of the resistor RH depend on the air humidity's percentage (noted X) following the relation RH=30X; where RH is in 2 and X in %. In all numerical applications, we will suppose that B+1ß. VDD is referenced to ground.. R₁ RH R₂ Capteur d'humidité Thevenin IBI VBEI R₂ LED rouge VDD Figure1: D. ICI T₁ VCEI VEI 1. Determine the expressions of the elements of the equivalent Thevenin generator (indicated on the figure) according to VDD, R₁, R₂ and RH. 2. Taking into account the operation of the transistor, give the expression of the current flowing through the resistor R3 as a function of IB1.

Electric Motor Control

10th Edition

ISBN:9781133702818

Author:Herman

Publisher:Herman

Chapter59: Motor Startup And Troubleshooting Basics

Section: Chapter Questions

Problem 12SQ: How is a solid-state diode tested? Explain.

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