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Author Topic: Basic Electrical Components  (Read 6511 times)

Offline ΔЅịMø

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Re: Basic Electrical Components
« Reply #200 on: May 20, 2012, 09:45:04 PM »
Ginagamitan ko lang ng xtor yung mga relays ko lalo na't MCU yung mag-da-drive at 12v na relay.
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Re: Basic Electrical Components
« Reply #200 on: May 20, 2012, 09:45:04 PM »

Offline dummy_c

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Re: Basic Electrical Components
« Reply #201 on: May 20, 2012, 09:47:13 PM »
^ Hindi ako gumagamit ng xtor para sa LED.
Kahit nga sa 7segment hindi na ako gumagamit ng xtor.

Pang test lang prof if tama ba ang pagka connect sa xtor.

Naka turn on pa ang wifi sa kapitbahay prof. ;D
Pahinga muna tayo sa ENC discussion.
Nahihilo na ako paano mag hex to char conversion para sa LCD display.
The world's technology is always changing, no doubt about it, and I hope it’s a while yet before it impacts my ability to tinker.

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Re: Basic Electrical Components
« Reply #201 on: May 20, 2012, 09:47:13 PM »

Offline ΔЅịMø

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Re: Basic Electrical Components
« Reply #202 on: May 20, 2012, 09:56:03 PM »
^ Hindi ako gumagamit ng xtor para sa LED.
Kahit nga sa 7segment hindi na ako gumagamit ng xtor.

Pang test lang prof if tama ba ang pagka connect sa xtor.

Naka turn on pa ang wifi sa kapitbahay prof. ;D
Pahinga muna tayo sa ENC discussion.
Nahihilo na ako paano mag hex to char conversion para sa LCD display.

Ahhh. Owkey po sir. No problem po. Kung kailan ka lang available. ;D
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Re: Basic Electrical Components
« Reply #202 on: May 20, 2012, 09:56:03 PM »

Offline ???

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Re: Basic Electrical Components
« Reply #203 on: May 20, 2012, 09:59:11 PM »
Gawan mo na kasi ng truth table prof. Hex-binary-character conversion.   ;D
*http://www.elab.ph/forum/index.php?topic=33717.msg632945#msg632945
*http://www.elab.ph/forum/index.php?topic=37150.0

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Re: Basic Electrical Components
« Reply #203 on: May 20, 2012, 09:59:11 PM »

Offline ΔЅịMø

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Re: Basic Electrical Components
« Reply #204 on: May 20, 2012, 10:01:41 PM »
Gawan mo na kasi ng truth table prof. Hex-binary-character conversion.   ;D

Hindi ko po yun alam sir. ;D
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Re: Basic Electrical Components
« Reply #204 on: May 20, 2012, 10:01:41 PM »

Offline Deantyne

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Re: Basic Electrical Components
« Reply #205 on: May 21, 2012, 10:30:53 AM »
^ merong mga transistor from different manufacturers (generic) na iba ang pinout from datasheet kaya minsan 'di ako nagtitiwala sa datasheet lang lalo na pag Chinese 'yung gumawa. :D

actually, kapag gumagamit ako ng transistor (hindi replacement) bukod sa tester, tine-test ko talaga sa actual use kung ano 'yung pin config. mahirap na magkamali kapag nakapag-design na ng board. :D

yes..tama nga si Rd..in troubleshooting I test those parts(res,caps,xsistor) kahit na bago,baka baliktad or out of percentage para iwas sakit sa ulo..ito rin kasi minsan ang nA-ayos ko na mga units galing sa ibang tech..mali or baligtad ang mga pin config.. 8)
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Re: Basic Electrical Components
« Reply #206 on: May 21, 2012, 10:41:16 AM »
^Paano mo sir nalalaman kung baligtad ang ayos?


Sakin naman kagabi yung desklamp ko na bigla na lang ayaw gumana. Tranny pabalik pala orientation ng pin niya, malamang hina made sa halip na bce eh ecb, kaya pala sa component orientation pabalik yung nakamarka sa orientation nung tranny.
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Offline Deantyne

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Re: Basic Electrical Components
« Reply #207 on: May 21, 2012, 06:57:05 PM »
bago kasi ayusin ko yong unit, interview ko muna ang customer kung dumaan na sa ibang tech..then by visual ,check ko lhat ang pin config ng transistor, by experience malalaman mo na kasi anong pin config ng mga common transistors...then baka may mali din sa printing sa pcb board para makasiguro better to double check it with multitester.
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Offline limpbiskwit

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Re: Basic Electrical Components
« Reply #208 on: May 21, 2012, 08:00:41 PM »
_
mga master,, baka meron po kayong module na may mga schematic diagram for EIM,,, kahit ung mga basic lang tapos ung tools and equipment,, para may narereview aq at di inaagiw utak q,, papaprint q lng po,, EIM NCII grad.po aq ng tesda... maraming salamat sa makakatulong..
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Offline jing999

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Re: Basic Electrical Components
« Reply #209 on: May 29, 2012, 02:24:17 PM »
pasali dto mahilig ako sa eletronics kaso kararampot lang alam ko...wanna be invntor smday...

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Re: Basic Electrical Components
« Reply #210 on: May 29, 2012, 08:27:15 PM »
Teka ano po ba mga ibig sabihin ng ganito sa mga transistors?

Vce   ?
Vbe   ?
Ft     ?
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Offline ΔЅịMø

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Re: Basic Electrical Components
« Reply #211 on: May 29, 2012, 08:31:18 PM »
Teka ano po ba mga ibig sabihin ng ganito sa mga transistors?

Vce   ?
Vbe   ?
Ft     ?


Yung

Vce po sir is the voltage across Collector and Emitter.
Vbe po is yung voltage across Base and Emitter.
Ft? Hmmmmm. Transistor masters. ;D
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Offline ???

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Re: Basic Electrical Components
« Reply #212 on: May 29, 2012, 08:33:00 PM »
Layo naman ng sagot mo.  ???


Meron din bang Vbc?   hfe  ?   beta?
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Offline Engr. Dacuycoy

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Re: Basic Electrical Components
« Reply #213 on: May 29, 2012, 08:40:32 PM »
Vce is the voltage between the collector and emitter of a bipolar junction transistor. It  is a crucial voltage of a transistor circuit because it determines the transistor's load line and q-point.

Vbe is the voltage that falls between the base and emitter of a bipolar junction transistor. Vbe is assumed to be constant at approximately 0.7v for a transistor circuit

Ft =  unity gain frequency of a transistor’s short circuit current gain, ft is a standard figure of merit used by analog designers to evaluate a transistor’s performance.

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Offline ΔЅịMø

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Re: Basic Electrical Components
« Reply #214 on: May 29, 2012, 08:44:55 PM »
Layo naman ng sagot mo.  ???


Meron din bang Vbc?   hfe  ?   beta?

;D ;D ;D
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Offline ???

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Re: Basic Electrical Components
« Reply #215 on: May 29, 2012, 08:45:35 PM »
1. Meron din bang Vbc?

2. Ang Ft ba ibig sabihin ay transition frequency? San ba ito ginagamit? Ano ang kahalagahan niya sa pagtingin ng transistors?
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Offline gorex

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Re: Basic Electrical Components
« Reply #216 on: May 29, 2012, 08:55:13 PM »
sa pag kakaintindi ko ang ft sa transistor lalo na sa audio pag high ft output transistor mas malinaw mas maganda tumonog compare sa low ft na output transistor.kasi pag low ft mag distort sa high frequencies. compare natin ang transistor na pinasikat ng sakura at konzert yung 2sc5198 ft 30 mhz. compare sa 2n3055 ft 2.5 mhz. tapos compare mo sound output di ba mas malinaw ang sound at mas buhay na buhay  ang tweeter yung mga bagong transistor na 30 mhz at 5o mhz.sa sanken me 50 mhz sila. pero mga master paki dagdag lang baka kulang ang explanation ko. thanks :D
We use negative feedback in audio amplifiers to stabilize the gain, increase the bandwidth,lower the output impedance and lower the non-linear distortion.

Offline ???

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Re: Basic Electrical Components
« Reply #217 on: May 29, 2012, 08:57:48 PM »
Kailangan bang mas mataas ang ft niya sa audio application?
*http://www.elab.ph/forum/index.php?topic=33717.msg632945#msg632945
*http://www.elab.ph/forum/index.php?topic=37150.0

Offline ΔЅịMø

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Re: Basic Electrical Components
« Reply #218 on: May 29, 2012, 09:01:30 PM »
Vce is the voltage between the collector and emitter of a bipolar junction transistor. It  is a crucial voltage of a transistor circuit because it determines the transistor's load line and q-point.

Vbe is the voltage that falls between the base and emitter of a bipolar junction transistor. Vbe is assumed to be constant at approximately 0.7v for a transistor circuit


Tama pala yung sagot ko sir ? ? ?. ;D
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Offline ???

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Re: Basic Electrical Components
« Reply #219 on: May 29, 2012, 09:08:46 PM »
Yung sa Ft ang tinutukoy ko prof.  :D
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Re: Basic Electrical Components
« Reply #219 on: May 29, 2012, 09:08:46 PM »

 

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