May simpol DIY.

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May simpol DIY.

Post by james on Mon Sep 08, 2014 6:59 pm

Ito mga simpol DIY ko.


12Vdc tapos positive meron 1K na resistor tapos cathode ng LED yung dulo nakakabit sa negative ng supply

Presto power LED indicator.

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Re: May simpol DIY.

Post by james on Mon Sep 15, 2014 3:16 pm

Wahh 21 views lang. saklap scratch 

Ito namanayun simple power adaptor with voltage regulator na 12 vdc positive regulator.

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Re: May simpol DIY.

Post by Electro on Mon Sep 15, 2014 3:54 pm

master tanong ko lang. pwede ba yan gamitin pang charge ng cellphone?

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Re: May simpol DIY.

Post by james on Mon Sep 15, 2014 9:15 pm

Master naman di po ako master. Newbie lang po.

Sa katanungan mo po depende po yan sa unit. Kung mga sinauna siguro maaari. Pero mga 7vdc lang mga nakita ko noon. Ngayon po mga 5vdc na lang.

Meron ka kasi silang minsan na implement na kunting daya minsan meron may resistor na kailangan sa data line. Yung iba iba rin.

Yung iba gusto yung pulse signal.

Pero po karaniwan ngayon ng mga portable devices nachacharge sa voltage na 5vdc.

Subok nyo na lang po kung maaari. Pero ito pong napost ko eh 12vdc ang potential niyan.

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Re: May simpol DIY.

Post by Electro on Tue Sep 16, 2014 11:35 am

may nakita kasi ako nag ganyan dati master sa mga technician ng mga cellphone. 7805 at isang resistor. di ko lang alam ang value. nakakapag charge talaga ng nokia phone.

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Re: May simpol DIY.

Post by alvinquimbo on Tue Sep 16, 2014 10:15 pm

@sis electro...pwede yan pang charge ng cp basta daan lang ng 7805 na regulator..mostly sa mga charger ay 5v ang out..

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Re: May simpol DIY.

Post by Electro on Thu Sep 18, 2014 12:52 pm

nasubukan ko kasi yan dati master na 5v regulator lang. pero ayaw talaga.

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Re: May simpol DIY.

Post by james on Thu Sep 18, 2014 1:27 pm

Check mo yung cp charger kung ilan ang output.


Meron kasi yan noon na dapat meron pang resistor galing positive line to -data data line kung hindi ako nagkakamali parang 100 ohms na resistor. Nagpapara yang trigger sa maybe fet or transistor sa mismong unit. Mas makita ko yan sa mga china mp4 player with games.

Nauso yung ayaw ng manufacturer na magamitan ng hindi sa kanilang charger ang unit nila.

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Re: May simpol DIY.

Post by dizon on Fri Sep 19, 2014 10:59 am

diba mga master current ang pinapahina ng resistor? hindi kaya current ang dinadaya para mag charge siya

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Re: May simpol DIY.

Post by james on Mon Sep 22, 2014 9:08 pm

No parang meron siyang switch sa loob. Tingin ko parang switch na series pass transistor. Dahil 3.7Vdc lang naman karaniwan ang battery voltage. So meron pang headroom para maglagay ng series pass o fet switch.

Parang ganito. Pero di ko pa confirm iyan. Pero yan ang pinakasimple kong naiisip na pwedeng implement.

Yung dulo ng resistor Rs dadaan sa -data line in turn tapos yung 5vdc+ sa 5V terminal ng usb. Yung transistor nasa loob ng unit or battery.

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Re: May simpol DIY.

Post by james on Wed Oct 08, 2014 8:31 pm

Ito naman yung simple kong nagawang adjustable VR PS.

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Re: May simpol DIY.

Post by james on Wed Oct 08, 2014 8:33 pm

Meron yan diode shunt between Vin to Vout, anode at Vout at Kathode on Vin connection. For reverse protection. Yung Vin binaba ko sa 25Vdc.

Using LM317T Positive VR not 117

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Re: May simpol DIY.

Post by Electro on Thu Oct 09, 2014 6:35 pm

james wrote:No parang meron siyang switch sa loob. Tingin ko parang switch na series pass transistor. Dahil 3.7Vdc lang naman karaniwan ang battery voltage. So meron pang headroom para maglagay ng series pass o fet switch.

Parang ganito. Pero di ko pa confirm iyan. Pero yan ang pinakasimple kong naiisip na pwedeng implement.

Yung dulo ng resistor Rs dadaan sa -data line in turn tapos yung 5vdc+ sa 5V terminal ng usb. Yung transistor nasa loob ng unit or battery.

para pala siyang regulator master. pero nasa loob na ng cellphone

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Re: May simpol DIY.

Post by james on Mon Oct 13, 2014 5:03 pm

Maybe, I am not that sure.

Moving on.

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Re: May simpol DIY.

Post by Electro on Tue Oct 14, 2014 12:28 pm

post pa po kayo master

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Re: May simpol DIY.

Post by james on Sat Nov 29, 2014 9:00 pm

Busy sa ngayon.

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Re: May simpol DIY.

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