Bridge Rectifier Regulated Lab Power Supply Circuit Schematics

7/24/2019 Bridge Rectifier Regulated Lab Power Supply Circuit Schematics

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Bridge rectifer regulated lab

power supply circuit

schematics

A good regulated AC to DC

power supply circuit is

essential or any electronic

hobbyists and electronicstudents to do thier electronics

hobby projects. Also a bridge

rectifer power supply is one o

the introductory circuits orbeginners. Firstly we need to

know what is a bridge

rectifer? A rectifer circuit

employs the conersion o AC

oltage to DC oltage. Full

wae bridge rectifers hae the

beneft that they transer both


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hal cycle o AC input into DC

output and also e!ciency is

two times greater than that ohal wae rectifer. Bridge

rectifer circuits are put into

practice using diodes such as

"#$%%"& "#$%%' etc.(ransormer less AC to DC

power supply

Dual power supply using single

battery sourceBelow is the circuit schematic

o rectifer regulated power

supply using ')** oltage

regulator +C. ')** is a positieoltage regulator and aailable

at di,erent output oltages as


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')%- or -& ')%/ or /& ')"-

or "- etc. 0ence you can

implement power supplies orre1uired oltages& that is -&

/ or "- as you like. 2older

this regulated power supply

circuit on 3CB and enclose it ina suitable case& defnitely it will

help you or uture circuit

projects.

Circuit diagram

Components re1uired

2tep down transormer 4"A&

56% or ""% primary


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secondary should be your

choice like 7& / etc8.

Diodes 9 $ 4"#$%%" or low

power "#$%%' or moderate

power8

Capacitor 4$'%:F& "78

oltage regulator +C ')**

40ere we hae used ')%-8

;orking

Circuit consists o $ parts< 2tepdown transormer& bridge

rectifer& capacitor flter and

oltage regulator +C.

(he transormer step downsthe high oltage AC to a low

oltage AC.


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During the positie hal cycle

o secondary oltage& diodes

D5 and D6 are orward biased

and diodes D" and D$ are

reerse biased& now the

current =ows through D5>@oad>D6

During the negatie hal cycle

o the secondary oltage&

diodes D" and D$ are orwardbiased and diodes D5 and D6

are reerse biased #ow the

current =ows through D$>

@oad>D"

+n both the cycles load current

=ows in same direction& hence


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we get a pulsating DC oltage

across the points BB.

(he pulsating content are

called ripples and a flter

capacitor is used to remoe the

ripples rom pulsating DC.

;hen the instantaneous alues

o pulsating DC oltage

increases& the capacitor gets

charged up to peak alue othe input.

;hen the instantaneous alues

o pulsating DC oltage

decreases& the stored oltagein the capacitor reerse biases

the diodes D5 and D$. 0ence it


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will not conduct& now capacitor

discharges through the load.

(hen oltage across thecapacitor decreases.

During the ne9t cycle& when

the peak oltage e9ceeds the

capacitor oltage& diode D5 orD$ orward biases accordingly&

as a result capacitor again

charges to the peak alue. (his

process continues. 0ence weget almost smooth DC oltage

as shown.

Brown color indicates pulsatingDC and ed color is the fltered

DC oltage.


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(hen the fltered oltage is

applied to the input o ')%-

oltage regulator +C& it in turnregulates the oltage or line

and load =uctuations.

Brown color indicates capacitor

output DC and ed color is the

regulated - DC rom ')%-.

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Bridge Rectifier Regulated Lab Power Supply Circuit Schematics