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View Full Version : i need help. regarding bc239c


eastcoast
09-11-2002, 01:44 AM
i need help. regarding bc239c

because i cant find it here in my country.

i nid to know what can i substitute for this.

here is the schematics made by dejan.
salias
09-11-2002, 06:51 AM
ask nase ck. He will provide for you from Kelantan, Malaysia
Manipulator
09-11-2002, 08:14 AM
you can replace with BC547b,but you must be carefull with the output/connection.it work fine.
eastcoast
09-11-2002, 01:00 PM
cant i use just the closes specification as substitute for it????
Manipulator
10-11-2002, 07:49 AM
Originally posted by eastcoast
cant i use just the closes specification as substitute for it????

yes you can.
eastcoast
11-11-2002, 03:47 AM
ok il just try it.


thanks anyway.
salias
11-11-2002, 03:51 AM
Have u tested with 10mhz crystal? Working or not?
eastcoast
11-11-2002, 12:51 PM
not yet.

mabe you can ask other pro's out there
Phillipus
11-11-2002, 03:16 PM
@eastcoast
im from cebu, where are u from?

i did manage to buy a bc239c and build the dejan sim card reader but it doesnt work. it only damaged my prepaid sim.
eastcoast
11-11-2002, 04:06 PM
im from quezon city

and i did not manage to get that.

maybe you can send your project to me and let me try it???

what program did u use?

maybe i can buy it from u???
Manipulator
11-11-2002, 06:37 PM
Originally posted by salias
Have u tested with 10mhz crystal? Working or not?

it is depent on your simcard,reader and computer.
not all simcard and computer support that.
Joker_hk
11-11-2002, 07:30 PM
bc239c is not a problem, just use any npn general purpose transistor and it will work fine bc550 will do the job just watch the pinout but I think it matches...

By the way, see the two transistors in the top, connected to the red led... It's a voltage regulator for 5v, if u want you can replace them with a single lm7805.... this is a 5v regulator get the datasheet and use it if you want...


hope this helps
Manipulator
12-11-2002, 09:10 AM
yes,it will be easier and better if you use the 7805 as 5v regulator.
eastcoast
12-11-2002, 01:43 PM
thank for the help.


i got one more question.

can a sim writer edit the load of a pre paid sim???
Manipulator
21-11-2002, 10:20 AM
Originally posted by eastcoast
thank for the help.


i got one more question.

can a sim writer edit the load of a pre paid sim???

no you can't edit the balance money.the amount is stor in service pro. server.
eastcoast
21-11-2002, 11:35 AM
ok

thanks.