2N4401 substitute on india/Dhaka

audioguru

Well-Known Member

Most Helpful Member

• Dec 3, 2006

• #21

mamun2a said:

does bc548/c828 can be replaced wt any one of 2n2222,2n4401,2n3904,bc547,bc549?

Click to expand...

What is a "c828"? If it is a BC828 then it is PNP. The others are NPN.

Some of those transistors have a higher max current rating than the others. Some have a higher current gain than the others. They have different max voltage ratings. They have pins in different layouts.
But for this simple voltage step-up circuit any of the NPN transistors will work.

 

M

mamun2a

New Member

• Dec 3, 2006

• #22

it means bc548 is work for the V step up circuit.

 

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audioguru

Well-Known Member

Most Helpful Member

• Dec 4, 2006

• #23

You can use a BC547, BC548, BC549, 2N2222, 2N3904, 2N4401 or any other little NPN transistor. Thousands of different little NPN transistors will work.

1) The circuit has a max voltage of only about 3.5V if a single blue or white LED is used. Little transistors are rated for voltages of up to about 30V.
2) The circuit has a max current of about 15mA. Little transistors have a max current rating of up to 200mA.
3) It operates at about 100kHz. Little transistors operate up to about 100MHz.

 

M

mamun2a

New Member

• Dec 4, 2006

• #24

thank u guru,
i got bc548 so i can start it now, what do u say.

 

M

mamun2a

New Member

• Dec 18, 2006

• #25

I ve found bc548 is work against 2n4401, but the R is to put down i use 100 ohm for lightup with 1.5 v, otherwise (1 k ohm) it need 3 volt 2 lightup, this is xcelant circuit. more winding on ferit core is raise battery life (randall's suggestion).

thanks all for help

 

Last edited: Dec 18, 2006

anurag pandey

New Member

• Jan 8, 2017

• #26

hello i want a replacement of transitor c828 please tell me sir
my mail
MOD EDIT... Don't divulge email address on forum

 

Last edited by a moderator: Jan 8, 2017

L

Les Jones

Well-Known Member

Most Helpful Member

• Jan 8, 2017

• #27

It is a very bad idea to put your email address on any forum. If you want to give it to another forum member pass it to them via the messaging system. You should also start your own thread to ask a new question. This thread is over 10 years old.

Les.

 

JimB

Super Moderator

Most Helpful Member

• Jan 8, 2017

• #28

Try google:
https://www.google.co.uk/?gws_rd=ssl#q=c828+transistor+equivalent

At a quick guess, just about any small signal NPN transistor will work in its place.

10 year old thread - Locked.

JimB