expired_20
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« on: February 28, 2009, 12:30:18 AM » |
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pde po papost ng schematic kung meron kau...tnx2
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The Philippine Electronics and Technology Forum
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« on: February 28, 2009, 12:30:18 AM » |
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toasted siopao
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« Reply #1 on: February 28, 2009, 12:40:12 AM » |
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Gamit ka na lang ng single IC lang, LM1084-5.
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Enjoying the Australian outback.
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marcelino
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« Reply #2 on: February 28, 2009, 12:44:39 AM » |
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kung wala, lagyan mo ng PNP transistor sa taas...
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"Don't take life seriously. After all, no one has ever come out of it alive. -Bugs Bunny"
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akhen
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« Reply #3 on: February 28, 2009, 12:47:44 AM » |
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pde po papost ng schematic kung meron kau...tnx2 regulated or not? |
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marcelino
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« Reply #4 on: February 28, 2009, 12:54:41 AM » |
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 i modify mo nalang to fit you needs. you can start by choosing a transistor capable of 3A. |
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"Don't take life seriously. After all, no one has ever come out of it alive. -Bugs Bunny"
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HexFET
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« Reply #5 on: February 28, 2009, 08:56:36 AM » |
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TO220 KA78T05TU-ND Fairchild 3A 5V  |
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beginner wan
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« Reply #6 on: February 28, 2009, 09:00:27 AM » |
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TIP32C.. 3 amps.. TIP42, 6A..  available sa alexan... |
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expired_20
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« Reply #7 on: February 28, 2009, 10:31:47 AM » |
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kung gagamitin ko LM1084-5, kahit ala n ung PNP transistor? what does the transistor do in the ckt po b?
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toasted siopao
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« Reply #8 on: February 28, 2009, 10:38:21 AM » |
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Kahit wala na pass transistor pwede mo ma-achieve ang 3A, yung transistor, dun dadaan ang current mo, kaya pass transistor ang tawag.
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johnson.chua
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« Reply #9 on: February 25, 2010, 08:04:28 PM » |
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pwede ba gawin charger yun sir pogi?
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johnson.chua
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« Reply #10 on: February 25, 2010, 08:09:49 PM » |
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sir marcelino pwede ba gawin charger yung binigay m schematic?
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macky
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« Reply #11 on: February 26, 2010, 10:24:27 AM » |
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kung gagamitin ko LM1084-5, kahit ala n ung PNP transistor? what does the transistor do in the ckt po b?
kahit wala na dahil 5Amp(yata) ang max current niyan accdg to datasheet here: http://www.national.com/ds/LM/LM1084.pdfyung circuit kasi ni sir marce LM78XX, 1.5A lang (yata) max current niyan, kaya dadagdagan ng transistor para tumaas. |
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Ugin
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« Reply #12 on: February 26, 2010, 10:29:06 AM » |
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pde po papost ng schematic kung meron kau...tnx2
Ano ito, project? If not, then why not use a PC power supply, high efficiency pa. An old PC enclosure with power supply can be useful. Meron ako nakuha, 50 pesos lang binili ko sa mambobote..then repair ko power supply (fuse lang problema), ayun may 5V at 12V supply na ako... |
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engineer7@home
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« Reply #13 on: May 29, 2010, 01:31:07 PM » |
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pde po papost ng schematic kung meron kau...tnx2
A 3 ampere output current is quite high, so It may not be "COOL" to use a linear regulator. Other regulators if short circuited will enter into constant current mode equal to the output rating of the regulator. Here is a circuit of a high efficiency switchmode non-isolated buck regulator with a foldback current limiting. You can download the datasheet of the SH1605 in www.national.com or in www.alldatasheet.com for the specs and the formulas for the appilcation of the power IC. I also sell the SH1605 for Php 75.00. Meet only in SM Center Las Pinas or SM Starmall Las Pinas text 09158872962 if youre buying one  If this helps, please give me a pogi point or buy the electronic parts I sell |
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Microcircuits gave me schizophrenia for Php2600/month in 1992
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The Philippine Electronics and Technology Forum
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November 07, 2010, 11:55:50 PM
