Prepared by: Partha Kumar Das Lecturer, Dept. of ME, BUET ME 362 Instrumentation and Measurement Sessional 5 Volt Power Supply Prepared by: Partha Kumar Das Lecturer, Dept. of ME, BUET Courtesy: Dr. A. K. M. Monjur Morshed Assistant Professor, Dept. of ME, BUET

5 V Power Supply 1. Step Down Transformer Basic Components: Step down transformer Voltage regulator Capacitors Diodes 1. Step Down Transformer Non-tapped Transformer Center-tapped Transformer

1. Step Down Transformer

2. LM 7805 IC 7805 is a 5V Voltage Regulator that restricts the voltage output to 5V from an input of 7.5 to 35 V DC. 7805 IC Rating : Input voltage range = 7V- 35V Current rating Ic = 1A Output voltage range VMax=5.2V ,VMin=4.8V If the voltage is near to 7.5V then it does not produce any heat and hence no need for heatsink. If the voltage input is more, then excess electricity should be liberated using as heat from 7805 heat sink.

LM 7805

3. Capacitors Generally three types: 1. Non-polar Capacitor 2. Polar/ Electrolytic Capacitor 3. Variable Capacitor

Diodes (1N4007)

5 V Regulator Circuit

5 V Regulator Circuit

Class Performance 1

Class Performance 2 & 3