A Full-wave rectifier is a circuit arrangement that makes use of both half cycles of input alternating current (AC) and converts them to direct current (DC). In our tutorial on Half-wave rectifiers, we have seen that a half-wave rectifier makes use of only one-half cycle of the input alternating current. Thus a full-wave rectifier is […]
Centre-Tap Full Wave Rectifier We have already discussed the Full Wave Bridge Rectifier, which uses four diodes, arranged as a bridge, to convert the input alternating current (AC) in both half cycles to direct current (DC). In the case of centre-tap full wave rectifier, only two diodes are used, and are connected to the opposite
Description. Here is the circuit diagram of an infrared intrusion detector. Whenever a trespasser cuts the invisible infrared beam an alarm sound will be raised. The arrangement consists of a receiver circuit and a transmitter circuit. The transmitter circuit is based on two TLC555 ICs (IC1 and IC2). The first 555 (IC1) is wired as
Description. This is one of the simplest stereo balance indicator circuit that you can have. The circuit will give a visual indication (using two LEDs) proportional to the difference in balance between the left and right channels of a stereo system. The circuit is based on a uA741 opamp IC. The IC compares the signals
AIM: To write programs for i. Addition ii. Subtraction iii. Multiplication iv. Division of two numbers in 89C51. Addition PROGRAM MOV R0,#00 MOV DPTR,#4200 MOVX A,@DPTR MOV B,A INC DPTR MOVX A,@DPTR ADD A,B JNC LABEL1 INC R0 LABEL1 : INC DPTR MOVX @DPTR,A MOV A,R0 INC DPTR MOVX @DPTR,A HERE : SJMP HERE SAMPLE
A simple Half Wave Rectifier is nothing more than a single pn junction diode connected in series to the load resistor. As you know a diode is to electric current like a one-way valve is to water, it allows electric current to flow in only one direction. This property of the diode is very useful
AIM To prepare a program for 8085 to convert a decimal number to its corresponding ASCII number and to convert a given ASCII TO decimal. PROGRAM FOR DECIMAL TO ASCII CONVERSION LDA 4200 CPI 0A JC LABEL1 ADI 30 JMP LABEL2 LABEL1:MVI A,EE LABEL2:STA 4201 HLT SAMPLE OUTPUT: ADDRESS DATA INPUT/OUTPUT 4200 01 Input 4201
General Introduction to DC power supplies: The electrical power is almost exclusively generated, transmitted and distributed in the form of ac because of economical consideration but for operation of most of the electronic devices and circuits, dc supply is required. Dry cells and batteries can be used for this purpose. No doubt, they have the
AIM:To prepare an assembly language program for 8085 to separate the nibbles of an 8 bit number. PROGRAM: MVI C,00 LDA 4200 MOV C,A ANI OF STA 4201 MOV A,C ANI F0 RRC RRC RRC RRC STA 4202 HLT SAMPLE OUTPUT ADDRESS DATA INPUT/OUTPUT 4200 A3 INPUT 4201 03 OUTPUT 4202 0A OUTPUT RESULT:A program
In this article, we are going to learn a little deep about break down characteristics of PN Junction Diode and how “reverse break down” characteristics is put into practical applications. Before getting into the details, lets have a walk through our previous articles. 1. Understanding the PN Junction – is a great article to begin
Description. Here is the circuit diagram of a simple dynamic microphone amplifier using two transistors. The amplification factor of this circuit is around 150 and can handle signals from 50Hz to 100Khz.These features make it ideal for audio applications. The audio signal from the microphone is coupled to the base of Q1 via the capacitor
This blog post is continuation to the original post: Fabrication techniques of a P-N junction diode 1. Grown Junction Diode: Diodes of this type are formed during the crystal pulling process. P and N-type impurities can be alternately added to the molten semiconductor material in the crucible, which results in a P-N junction, as shown
Description. This is a very excellent 40W power amplifier design using TDA2030 IC and two transistors. The circuit employs only few components and does not require a dual power supply. The input signal is coupled to the non inverting input of TDA2030 through the DC decoupling capacitor C5. The TDA 2030 performs the major part
General Introduction to Fabrication techniques of a P-N junction diode: In practice, the P-N junction is formed from a single mono crystalline structure by adding carefully controlled amounts of donor and acceptor impurities. Here discussion is limited only to acquaintation with the basic techniques and terminology (not expertise in fabrication). The first and foremost requirement is
AIM :To prepare an assembly language program for 8085 to count the number of zeros,even and odd numbers in an array PROGRAM MVI C,00 MVI D,00 MVI E,00 LXI H,4200 MOV B,M INX H LXI H,4200 MOV B,M LABEL4:INX H MOV A,M CPI 00 JNZ LABEL1 INR C JNZ LABEL2 LABEL1:RRC JNZ LABEL3 INR D
AIM To prepare an assembly language program to find the square root of an 8 bit number for 8085 microprocessor PROGRAM MVI C,01 MVI E,01 LDA 4200 LABEL:SUBB C JZ LABEL1 INR C INR C INR E JMP LABEL LABEL1:MOV A,E STA 4201 HLT SAMPLE OUTPUT ADDRESS DATA INPUT/OUTPUT 4200 10 Input 4201 04 Output
AIM:To prepare an assembly language program for 8085 to multiply two 8 bit numbers PROGRAM MVI C,00 LDA 4200 MOV B,A LDA 4201 LABEL:SUBB B INR C JNC LABEL DCR C ADD B STA 4202 MOV A,C STA 4203 HLT SAMPLE OUTPUT ADDRESS DATA INPUT/OUTPUT 4200 02 Input 4201 05 Input 4202 01 Output 4203
AIM To prepare an assembly language program for 8085 to multiply two 8 bit numbers PROGRAM MVI C,00 LDA 4200 MOV B,A LDA 4201 MOV A,D MVI A,00 LABEL:ADD B DCR D JNZ LABEL JNC LOOP INR C LOOP:STA 4202 MOV A,C STA 4203 HLT SAMPLE OUTPUT ADDRESS DATA INPUT/OUTPUT 4200 04 Input 4201 02
AIM:To prepare a program to add two 16 bit numbers for 8085 PROGRAM MVI E,00 LHLD 4200 MOV C,L MOV B,H LHLD 4202 DAD B JNC LABEL1 INR E LABEL1:SHLD 4204 MOV A,E STA 4206 HLT SAMPLE OUTPUT ADDRESS DATA INPUT/OUTPUT 4200 F6 Input 4201 A3 Input 4202 2F Input 4203 B4 Input 4204 25
Thermistors are of two types, NTC (negative temperature coefficient) and PTC (positive temperature coefficient types). As their name indicates the resistance of an NTC thermistor will decrease with temperature and the resistance of a PTC thermistor will increase with temperature. Both PTC as well as NTC thermistors can be roughly checked by using an analogue
Photo-diode is a two-terminal semiconductor P-N junction device and is designed to operate with reverse bias. The basic biasing arrangement, construction and symbols for the device are given in figure. It is either mounted in translucent case or has its semiconductor junction mounted beneath an optical lens. The output voltÂage is taken from across a
This article shows you how to test a capacitor using analogue multimeter. Firstly short the capacitor leads for discharging it completely. Set the multimeter to high resistance mode. Connect the multimeter terminals to the capacitor leads. For electrolytic capacitors the positive terminal of multimeter must be connected to the positive lead of the capacitor and
The photoconductive cell is a two terminal semiconductor device whose terminal resistance will vary (linearly) with the intensity of the inciÂdent light. For obvious reasons, it is frequently called a photoresistive device. The photoconductive materials most frequently used include cadmium sulphide (CdS) and cadmium selenide (CdSe). Both materials respond rather slowly to changes in light
LDR (light dependent resistance) can be very easily tested by using a digital multimeter. We all know that the resistance of an LDR varies according to the light falling on it. At bright light, the LDR resistance will be around 500Ohms and at darkness the resistance will be around 200K. For a proper diagnosis we
Class D power amplifier. Class D power amplifier is a type of audio amplifier were the power handling devices are operated as binary switches. Since the power handling devices (MOSFETS) works as perfect binary switches, no time is wasted in between the transition of stages and no power is wasted in the zero input condition.
