Embedded PIC Microcontroller Based Digital Power Multimeter This Digital Power Multimeter is designed to display the all electrical and Electronics parameters in one single equipment. The Digital Power multimeter is fully integrated without having any transducers or converters externally. It is a microcontroller based circuit designed with powerful software built-in for the following sampling inputs for the measurement of several AC Parameters, DC Parameters and Others. This can be installed in a test bench of the equipment under test.

1. Embedded PIC Microcontroller Based
Digital Power Multimeter
This Digital Power Multimeter is designed to display the all
electrical and Electronics parameters in one single equipment.
The Digital Power multimeter is fully integrated without
having any transducers or converters externally.
It is a
microcontroller based circuit designed with powerful software builtin for the following sampling inputs for the measurement of several
AC Parameters, DC Parameters and Others.
This can be installed in a test bench of the equipment under
test.
Application:
• Multimeter Monitoring Parameter:
o AC Voltage & Current
o DC voltage & Current
o Resistor s ohms
o Diode drop voltage
o Temperature sensor using Temp Degree

2. Block Diagram:
Step Down
Transformer
+5V
+5V
Regulated
Regulated
Power Supply
Power Supply
Battery
DC Voltage
DC Voltage
Measuring
Measuring
Circuit
Circuit
Resistors
DC Current
DC Current
Measuring
Measuring
Circuit
Circuit
Ohms
Ohms
Measuring
Measuring
Circuit
Circuit
Diode
Drop
Drop
voltage
voltage
Measuring
Measuring
Circuit
Circuit
MICROCONTROLLER
PIC16F877A
POTENTIAL
POTENTIAL
TRANFORMER
TRANFORMER
30V Centre Tap
30V Centre Tap
Transformer
Transformer
AC Voltage
AC Voltage
Follower
Follower
Conditioning
Conditioning
Circuit
Circuit
AC Current
AC Current
Follower
Follower
Conditioning
Conditioning
Circuit
Circuit
Dual Regulated Power Supply
Dual Regulated Power Supply
(+12v and -12V)
(+12v and -12V)
20x4 LCD
20x4 LCD
Display
Display
CURRENT
CURRENT
TRANFORMER
TRANFORMER
Signal
Conditioning
Circuit
Temperature
Sensor
LOAD