power supply

[ferdie444]

@ striker_24,another option is to use transistor and zener diode.

parts list:
T1-transformer 220vac/7.5vx2(c.t.)@ 1A
D1-4 or bridge type diode 2a/50v rectifier
C1-2,200uf/25v or 4,700uf/25v electrolytic cap./filter(input)
C2-470uf/16v electrolytic cap./zd1 filter
C3-1000uf/16v filter out cap.electrolytic
R1-390 ohms/.5w carbon
Zd1-12v/.5w zener diode
Q1-2SC1060/61 regulator x'tor w/ heatsink

thanks @ sana makatulong......

[striker_24]

thank u po ng mrmi sa lhat!

[striker_24]

bnago na po pla ang specs..

Power Supply with an output of 0-12V (whole numbers only; 0, 1, 2, 3, 4, ..., 12) and 1A..


cno po my schematic nito?
Nu pong mterials kelngan gmitin?


lamat!


striker_24

[ferdie444]

bnago na po pla ang specs..

Power Supply with an output of 0-12V (whole numbers only; 0, 1, 2, 3, 4, ..., 12) and 1A..


cno po my schematic nito?
Nu pong mterials kelngan gmitin?


lamat!



striker_24

@striker_24,pls refer on my previous post na parts list,bale palitan mo lamng ung T1-transformer den remove mo ung c2,c3,zd1 and q1 @ change mo ung value ng r1=1k @ 1w pati ung c1=2,200uf/16v plus rotary selector switch 6 poles and don't forget to put fuse f1=1amp sa primary.you can put also on/off switch sa main ac line line.otherwise meron din nman na power supply kit na mabbili sa alexan and deeco w/ schematic diagram....

[graSS]

try this one... simulated na rin yan, u can add or change some parts pra mgkaroon ka ng idea kng paano mgstart...

[striker_24]

@striker_24,pls refer on my previous post na parts list,bale palitan mo lamng ung T1-transformer den remove mo ung c2,c3,zd1 and q1 @ change mo ung value ng r1=1k @ 1w pati ung c1=2,200uf/16v plus rotary selector switch 6 poles and don't forget to put fuse f1=1amp sa primary.you can put also on/off switch sa main ac line line.otherwise meron din nman na power supply kit na mabbili sa alexan and deeco w/ schematic diagram....

wla po kc ako sa mnila e kya di ako mkkbili sa alexan..

nwei,lamat po sir! tpos,send mo nalng po skin sir ang schematic na cnbi m po ha..

lamat!

try this one... simulated na rin yan, u can add or change some parts pra mgkaroon ka ng idea kng paano mgstart...

thanks po sir sa diagram..

[maldihtah13]

Maybe you could start at 1.5 V minimum then saka ka pa lang magstep ng 1v increment.

eto simple schematic nya using lm317



to make different voltage palitan mo lang ung value ng r2 using ng calculator below

http://www.electronics-lab.com/articles/LM317/

kung hindi possible ang fixed value resistor dahil sa unavailable ito gumamit ka ng variable resistor.

eto simpleng diagram. just add more resistor to create more output.

[striker_24]

mrming slamat po sa mga tumulong!..


isa nlang po problem ko ngaun,dpat po mging zero or 0.1 ang minimum Voltage..

0.6 po kc sa actual ang ngging minimum e..


here is the schematic diagram..




lamat po uli!



note:
LM317t po pla ang gmit kong regulator..


striker_24

['yus]

'di ba 1.25V ang minimum output ng LM317?

[maldihtah13]

pra dyan kailangan mo ng negative reference.