Uploaded December 2016 | Updated September 2026, 2 weeks ago
DC Regulated Power Supply Circuit
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In this video, we have a simple approach to obtain a 12V and 5V DC power supply using a single circuit. The circuit uses two ICs 7812 and 7805 for obtaining the required voltages. The AC mains voltage will be stepped down by the transformer T1, rectified by bridge B1, and filtered by capacitor C1 to obtain a steady DC level. The IC1 regulates this voltage to obtain a steady 12V DC. The output of the IC1 will be regulated by the IC2 to obtain a steady 5V DC at its output. In this way, both 12V and 5V DC are obtained.
Such a circuit is very useful in cases when we need two DC voltages for the operation of a circuit. By varying the type number of the IC1 and IC2, various combinations of output voltages can be obtained. If 7806 is used for IC2, we will get 6V instead of 5V.Same way if 7809 is used for IC1 we get 9V instead of 12V.
A Voltage Regulator (also called a "regulator") has only three legs and appears to be a comparatively simple device but it is actually a very complex integrated circuit. A regulator converts varying input voltage and produces a constant "regulated" output voltage. Voltage regulators are available in a variety of outputs, typically 5 volts, 9 volts and 12 volts. The last two digits in the name indicate the output voltage
Introduction:
It is very easy to get a stabilized voltage for ICs by using a three-terminal voltage regulator. The three-terminal voltage regulator outputs stabilized voltage at a lower level than the higher input voltage. A voltage regulator cannot put out a higher voltage than the input voltage. They are similar in appearance to a transistor. The 7800 series consists of three-terminal positive voltage regulators.
These ICs are designed as fixed voltage regulators and adequate heat sinking can deliver output currents in excess of 1A. These ICs are used to provide +5 volts and +12 volts supply. Line regulation in these ICs is a change in the output voltage for a change in the input voltage. Load regulation is defined as the change in output voltage for a change in load current. If there is any high voltage than 12 volts to 7812 it will convert to 12 V by this IC. If there is any voltage less than 12 volt it allows passing it. FAN is used for cooling the ICs.
There are two ICs 7805 and 7812 attached with the Intel-fan heat sink. From the base of 7805 IC we get the +5Volt Supply and from the base of 7812 IC we get the 12 Volt supply. Two LED are also connected with the respective ICs in order to indicate there proper working.
There are some voltage regulators
• LM7805 for + 5 volts
• LM7809 for +9 volts
• LM7812 for+12 volts
• LM7905 for-5 volts
• LM7909 for-9 volts
• LM7912 for-12 volts
As a general rule the input voltage should be limited to 2 to 3 volts above the output voltage. The LM78XX series can handle up to 30 volts input, but the power difference between the input voltage/current ratio and output voltage/current ratio appears as heat. If the input voltage is unnecessarily high the regulator will get very hot. Unless sufficient heat sinking is provided the regulator will shut down.
TISHITU
ISO: 9001-2008
RESEARCH AND CONSULTANCY CELL OF INDUSTRIAL APPLICATION
A Joint Accreditation System of Australia and New Zealand
Copyright © All Rights Reserved tishitu.net Reg No.08122629691/SSI
Accreditation No. M3111204IN
DC Regulated Power Supply Circuit
Buy This power supply
___________________________
amzn.to/35WpVlG
Step Down Converter 7.5V-35V to 5V Regulator Power Supply
amzn.to/35U00uW
220V AC to 5V DC 2Amp Circuit Board SMPS Power Supply AC DC Stepdown Buck Converter Module (40x 40x 15 mm)
amzn.to/3iRDPt8
Electronicspices PCB 2A 220V AC to 5V DC SMPS Power Supply Circuit Board
amzn.to/3iRDTZU
Generic Ei66X36 50W Power Transformer,220V 50Hz Input Dual Output 2X18V Ac Power Supply Adapter 1.1Kgs
amzn.to/3hXEBUk
BR1010 10A 1000V Full Wave Bridge Rectifier Module (High Current)
amzn.to/3hR3jWe
Electrobot 7805 L7805Cv Lm7805 Voltage Regulator Ic + 5V (1.5A)
amzn.to/33PYgAb
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amzn.to/2ZWrnka
VALUES 1/4W MIX RESISTOR KIT
amzn.to/32S67yd
5mm Diffused LED Pack-Basic-Ultimatum (Light Emitting Diode) White,Green,Red,Yellow,Blue Color Each 20Pcs Mix 5 Colours Total
amzn.to/3kDcLhS
ELECTROLYTIC CAPACITOR 1000uF 63V RADIAL SK-1000uf/63V
amzn.to/2RLGGrF
Soldering iron kit with Multimeter and Desolder pump
--------------------------------------------
In this video, we have a simple approach to obtain a 12V and 5V DC power supply using a single circuit. The circuit uses two ICs 7812 and 7805 for obtaining the required voltages. The AC mains voltage will be stepped down by the transformer T1, rectified by bridge B1, and filtered by capacitor C1 to obtain a steady DC level. The IC1 regulates this voltage to obtain a steady 12V DC. The output of the IC1 will be regulated by the IC2 to obtain a steady 5V DC at its output. In this way, both 12V and 5V DC are obtained.
Such a circuit is very useful in cases when we need two DC voltages for the operation of a circuit. By varying the type number of the IC1 and IC2, various combinations of output voltages can be obtained. If 7806 is used for IC2, we will get 6V instead of 5V.Same way if 7809 is used for IC1 we get 9V instead of 12V.
A Voltage Regulator (also called a "regulator") has only three legs and appears to be a comparatively simple device but it is actually a very complex integrated circuit. A regulator converts varying input voltage and produces a constant "regulated" output voltage. Voltage regulators are available in a variety of outputs, typically 5 volts, 9 volts and 12 volts. The last two digits in the name indicate the output voltage
Introduction:
It is very easy to get a stabilized voltage for ICs by using a three-terminal voltage regulator. The three-terminal voltage regulator outputs stabilized voltage at a lower level than the higher input voltage. A voltage regulator cannot put out a higher voltage than the input voltage. They are similar in appearance to a transistor. The 7800 series consists of three-terminal positive voltage regulators.
These ICs are designed as fixed voltage regulators and adequate heat sinking can deliver output currents in excess of 1A. These ICs are used to provide +5 volts and +12 volts supply. Line regulation in these ICs is a change in the output voltage for a change in the input voltage. Load regulation is defined as the change in output voltage for a change in load current. If there is any high voltage than 12 volts to 7812 it will convert to 12 V by this IC. If there is any voltage less than 12 volt it allows passing it. FAN is used for cooling the ICs.
There are two ICs 7805 and 7812 attached with the Intel-fan heat sink. From the base of 7805 IC we get the +5Volt Supply and from the base of 7812 IC we get the 12 Volt supply. Two LED are also connected with the respective ICs in order to indicate there proper working.
There are some voltage regulators
• LM7805 for + 5 volts
• LM7809 for +9 volts
• LM7812 for+12 volts
• LM7905 for-5 volts
• LM7909 for-9 volts
• LM7912 for-12 volts
As a general rule the input voltage should be limited to 2 to 3 volts above the output voltage. The LM78XX series can handle up to 30 volts input, but the power difference between the input voltage/current ratio and output voltage/current ratio appears as heat. If the input voltage is unnecessarily high the regulator will get very hot. Unless sufficient heat sinking is provided the regulator will shut down.
TISHITU
ISO: 9001-2008
RESEARCH AND CONSULTANCY CELL OF INDUSTRIAL APPLICATION
A Joint Accreditation System of Australia and New Zealand
Copyright © All Rights Reserved tishitu.net Reg No.08122629691/SSI
Accreditation No. M3111204IN
