Transistor Voltage Detector

Transistor Voltage Detector. The emitter connects to the base of the 2nd transistor and same with the next one. The blue line is the output, the green line is the input from v1 and the red line is a voltage of 4.7 volts.

ANG850B+ 17B+ Transistor Tester AC/DC Voltage Current
ANG850B+ 17B+ Transistor Tester AC/DC Voltage Current from www.aliexpress.com

Transistor series regulator since q 1 is an npn transistor, v o is found as: Since the zener voltage is constant, the increase in v o causes v be to decrease. The below input only rises to 4.8 volts and the circuit then passes a dropped 4.5 volts.

Therefore, The Transistor T1 Acts Like The Actual Temperature Detector With Reference To The Ambient Temperature As Detected By The Diode.


This is mega amplified with the high gain bc547's and viola, the led lights up. The capacitor 1nf between the collector and the emitter affects the voltage on the emitter consequently switches the transistor on / off. Ac voltage locator circuit depends on basic transistors' rudiments.

The Blue Line Is The Output, The Green Line Is The Input From V1 And The Red Line Is A Voltage Of 4.7 Volts.


I like it so much because it causes me to know the principle of the comparator circuit form. Collector to emitter current is controlled by the base current. The detector is suitable for input signals with input voltage gradients from 0 to 10v/ms.

To Start This Circuit You Need To Decide The Regulating Voltage Range Of Zener Diode Based On Load Element And Then Connect Two Pnp Transistors With Specific Voltage Rage.


Also, there is a voltage drop between the base and the emitter terminal of about 0.7v (one diode volt drop) for silicon devices as the input characteristics of an npn transistor are of a forward biased. Its transfer characteristic makes the device ideal for use as a product detector. The base pin of the transistor_3(t3) is applied for detecting the ac signal swaying.

Buzzer Will Give Sound And Led Will Glow When Copper Wire Of This Circuit Will Be In The Near Of Passing Current Phase Wire.


This is just what occurs within this transistorized metal detector circuit. Thus, a transistor acts as a switch. It blocks everthing up until 4.7 + a little volts.

Since The Zener Voltage Is Constant, The Increase In V O Causes V Be To Decrease.


The below input only rises to 4.8 volts and the circuit then passes a dropped 4.5 volts. This is a fundamental enhancement procedure. And finally ground the emitter of the 3rd transistor.

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