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LINEAR SPECS
Vin=110~220(Vac) 60Hz
Vout=0~20Vdc (D`arson val or LED Disp)
Iout=0~3A (D`arson val or LED Disp)
Load Reg=<1%
Overcurrent Limiting=start 3.5A
short ckt protection=stArts 4A, ckt latch to turn off (need to reset)
LOGIC INDICATOR
no load= led1-green, led2-off
full load=led1-amber, led2-off
overload=led1-red, led2-off
output short= led1-red, led2-red
hard short=led1-off, led2-red
pahelp naman dito... kahit yung schem lang nung nakaquote
LOGIC INDICATOR
no load= led1-green, led2-off
full load=led1-amber, led2-off
overload=led1-red, led2-off
output short= led1-red, led2-red
hard short=led1-off, led2-red
pahelp naman dito... kahit yung schem lang nung nakaquote
Ano po ba aim mo dito sir? anong function nyan? Voltage regulator?
voltage regulator po... variable sa 0-20V DC
meron kang design? ako na bahala sa logic indicators yung mismong regulator lang kailangan ko
eto dual trace...
AF? Audio generetor ba yun? Meron yata ako. Tapos yung dual trace oscilloscope, hanapin mo yung picture ng tektronics oscilloscope sa google images.
Ah, variable voltage regulator. Ok, gets. sige, gawan kita ng design pag di masyado busy.
Ang naiisip kong design, though wala pang calculations, kuha ka ng step down transformer turns ratio 5:1 4A current rating tapos bridge rectifier tapos filter capacitor na 1000uF, 100V tapos ipasok mo sa LM150 voltage regulator. Yung spec sheet nun iaattach ko. Yung circuit sa lower part ng page 6 yung nirerecommend ko na gamitin mo. Pero instead na 5Kohms yung potentiometer value, gamitin mo yung 3.6kohms para ang range nya ay 0 - 20v.
Yung sa transformer, input rating nya dapat yung 220v, 4-5A. Kasi maggegenerate yung ng secondary winding na 44V para in case na isaksak mo siya sa 110V, 22Volts yung secondary niya na pasok pa rin sa required input voltage ng regulator para kahit magvary yun, regulated pa rin between 0 - 20V yung output. Mababawasan pa yung 22/44 volts mo ng 1.4V dahil sa bridge rectifier. Ang masasabi ko lang dito sa ganitong design, kailangan mo ng heatsink kasi malaki power dissipation nito at less efficient siya dahil nga sa heat dissipation. Pero maaachieve mo yung aim mo na regulated variable supply na 0-20V, 0-3A... By the way, ang current output niya ay magvavary from 0-3A based sa description sa spec sheet.
Yung isang way (pero di ko na gagawin) na mas efficient ay yung pag gamit ng switching supply. Napaka efficient niya pero napaka elaborate nung design at tugma din naman sa subject niyo na power electronics. Research mo na lang yun.
GPS? Global Positioning System?
salamat sa idea!
yung LM150 yun na mismo yun regulator? o pass device siya after ng regulator IC? yung nakita ko kasing magandang regulator (na available sa deeco at alexan) is LM723... eh yung ginawa kong ciruit hindi complete kaya nagpapatulong sana ako
thanks!
pa help nmn s design mga masters ng rectifier
e2 ung circuit http://imageshack.us/photo/my-images/713/capture08012011064356.jpg/
tapos kailangan ko mailagay s 1 by 1.5 in n PCV ung design
e2 o ung PCv http://imageshack.us/photo/my-images/854/pcb.jpg/
medyo po kc nalilito ako s design pa elp po