8 Threads found on edaboard.com: bc547 bc337
I am designing a project for my electronics class that switches an LED on when it gets dark (and off when it gets light). Pretty basic except I want it to run off a 1.5 volt battery.
So I have a Joule Thief voltage booster to power the LED. That works OK.
But when I use a bc547 to switch the power to the Joule Thief circuit there is a voltage
Analog Circuit Design :: 01-15-2015 19:14 :: JohnJohn20 :: Replies: 6 :: Views: 929
Could anyone point me in the direction of a suitable discrete transistor amplifier schematic that would be suitable for amplifying the audio signal from an ipod before it goes into the control pin of a 555. Preferably using bc547, BBC548, BC549, BC557, BC558, BC559, C1815, A1015, BC327 or bc337.....all of which I have plenty
Hobby Circuits and Small Projects Problems :: 11-11-2012 06:33 :: IanP :: Replies: 10 :: Views: 3686
General Purpose Amplifier Transistors.
2N4401=NPN replacements: bc337, bc547, replacements: BC327, BC328,
Elementary Electronic Questions :: 02-05-2012 11:19 :: mister_rf :: Replies: 1 :: Views: 18823
hello ...i just wanted to know that which is the equivalent transistor for bc547?????
RF, Microwave, Antennas and Optics :: 07-01-2010 07:15 :: sanjubluerock3 :: Replies: 2 :: Views: 40842
i would like to know about the bc547 AND bc337A difference between two transistors, can i use it alternatively.
thanks & regards
Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 08-20-2009 17:25 :: dayal :: Replies: 5 :: Views: 6576
I was having a look at the "Amplified Ear" project over at ( ) and noticed that 3 of the 4 transistors were bc547 and only one was a bc337.
To this effect I have two questions:
1. AFAIK, the bc337 seems to be a better choice in every way over the bc547, so why did the author u
Analog Circuit Design :: 07-06-2009 16:56 :: KamalS :: Replies: 8 :: Views: 23137
I don't check if it's a software problem. But, you use a bc547 transistor, and you don't say anything about what kind of relay you used. BC546/bc547/BC548 transistors gain (hfe) are dependents of how much current drops from collector to emiter. First, base resistor must be lower 1K or less. I recomend that change the transistor to a bc337 is (...)
Microcontrollers :: 12-30-2005 11:15 :: penrico :: Replies: 10 :: Views: 1841
To drive piezo-buzzers you can use any general purpose NPN transistors ..
Here are some examples:
In general, select one with Vce ≥ 30V and Ic ≥ 100mA ..
Microcontrollers :: 12-28-2005 02:28 :: IanP :: Replies: 1 :: Views: 723