ELECTRICAL CIRCUITS LAB (1)
INTRODUCTION
LAB EQUIPMENT
 Power supply.
 Circuit board.
 Resistors.
 DMM.
 Wires
POWER SUPPLY (FUNCTION GENERATOR)
TERMINALS OF POWER SUPPLY
CIRCUIT BOARD
RESISTORS
MEASUREMENT DEVICES
 VOM (Volt-Ohm-milliammeter)
MEASUREMENT DEVICES
 DMM (Digital multimeter)
VOLTMETER CONNECTION
AMMETER CONNECTION
IMPORTANT NOTES WHEN MEASURING VOLTAGE AND CURRENT:
 Make sure the voltmeter is connected in parallel across the elements being measured.
 Make sure the ammeter is connected in series with the branch in which the current is being measured.
 Always start with the higher ranges and work down to the operating level to avoid damaging the instrument.
CONNECTION WIRES
OHM’S LOW
𝑉
𝑅=
𝐼
EXPERIMENT (1)
(VOLTAGE AND RESISTANCE MEASUREMENT)
EXPERIMENT (1)
PART (1) (VOLTAGE MEASUREMENT)
 The purpose of this experiment is to acquaint you with the equipment of the lab.
EXPERIMENT (1)
PART (1) (VOLTAGE MEASUREMENT)
XMM1
 Setting the output voltage of a DC Function generator with a DMM
a)
Connect the DMM to the output of the variable voltage terminals as shown
V1
12V
EXPERIMENT (1)
PART (1) (VOLTAGE MEASUREMENT)
𝑽𝒐
 Setting the output voltage of a DC power supply with a DMM
a)
Connect the DMM to the output of the variable voltage
terminals as shown
b)
Read values from DMM and function generator board LCD, then
fill the table.
𝑽𝒎
% Deference
EXPERIMENT (1)
PART (1) (VOLTAGE MEASUREMENT)
 Setting the output voltage of a DC power supply with a DMM
a)
Connect the DMM to the output of the variable voltage
terminals.
b)
Read values of voltage from Function generator and, from DMM
then fill the table.
c)
Calculate the deference from the equation
𝑽 −𝑽
%D𝑒𝑓𝑓𝑒𝑟𝑒𝑛𝑐𝑒 = 𝒐 𝒎 ∗ 100
𝑽𝒐
d) Plot the values in X-Y plan where X for 𝑽𝒐 and Y for 𝑽𝒎 .
𝑽𝒐
𝑽𝒎
% Deference
EXPERIMENT (1)
PART (2) (RESISTANCE MEASUREMENT)
XMM1
 Measuring the resistance using DMM and color code standard
a)
Read the color code of 9 resistors and write its values
b)
Connect the DMM to these resistors as shown and measure its values
R1
1kΩ
EXPERIMENT (1)
PART (2) (RESISTANCE MEASUREMENT)
 Measuring the resistance using DMM and color code standard
a)
Read the color code of 9 resistors and write its values
b)
Connect the DMM to these resistors as shown and measure its values
c)
Complete the table
Color
d) Calculate the deference from the equation
% D𝑒𝑓𝑓𝑒𝑟𝑒𝑛𝑐𝑒 =
e)
𝑅 𝐶𝑜𝑙𝑜𝑟 𝑐𝑜𝑑𝑒 −𝑅(𝑚𝑒𝑎𝑠𝑢𝑟𝑒𝑑)
𝑅 𝐶𝑜𝑙𝑜𝑟 𝑐𝑜𝑑𝑒
Red-black∗ 100 brown
Plot the values in X-Y plan where X for R (Measured)
and Y for R (Color code)
𝑅 𝑪𝒐𝒍𝒐𝒓 𝒄𝒐𝒅𝒆
200 Ω
𝑅 𝒎𝒆𝒂𝒔𝒖𝒓𝒆𝒅
% Deference
REPORT
 First page for experiment name
 Table of contents
 Introduction
 Objectives
 Methodology
 Equipment
 Procedures
 Simulation
 Results
 Discussion
Thank you