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BC Rev. A BC NPN Darlington Transistor. • This device is designed for applications requiring . This datasheet contains the design specifications for. BC 2. Motorola Small–Signal Transistors, FETs and Diodes Device Data. ELECTRICAL CHARACTERISTICS (TA = 25°C unless otherwise noted). BC datasheet, BC pdf, BC data sheet, datasheet, data sheet, pdf, Fairchild Semiconductor, NPN Darlington Transistor.

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We also replaced the transistor just in case it was broken, and tested some other crucial connections, although not all. Transistor The first time I connected the transistor without the base resistor, and I don’t think I’ve blown it but who knows Don’t try to switch the 12V, switch the GND and you are all set.

You’ll have to find out whether the digital section is opto-isolated with a multimeter.

BC Datasheet, Equivalent, Cross Reference Search. Transistor Catalog

But now the motor doesn’t do anything Project Would someone be interested why, I’m trying to control the solar panels at home to get them always at an optimal angle. Where is the datasheet for this drive? PHPirates on Jul 13, Now looking at the second picture, and there I can switch the connection to ground.


Everything runs on smoke, let the smoke out, it stops running Actual result Unfortunately the motor always starts when I connect the transistor, even if the base is connected to the Arduino ground. So since I want to switch the ground, I need to intercept the connection somewhere right? Thanks Tom, nice find, only one page further Is it opto isolated?

Datassheet fricking code tags!!!!

BC517 Datasheet, Equivalent, Cross Reference Search

If it doesn’t provide its own power you have to provide at least 12V externally and high-side switch it. Possible problem points I thought about: The circuits look similar, although they use an extra diode because of the dc motor and the motor is on the other side of the transistor, which I think shouldn’t matter.

I just bought some PNP transistors and made a high side switch now, using a circuit for example from Stackexchange. TomGeorge Design and Repair of industrial control systems.

Is that the way to go? Expected result There should flow current to the controller enable when the Arduino puts satasheet on the transistor, and not so otherwise.

BC517 – BC517 NPN Darlington Transistor

Base resistor I calculated the 4K7 value with help from this post and otherswhich led me to believe that with a 5K resistor I’d get a base current of 1mA, which with a gain of I checked the datasheet on this would mean it would be able to saturate collector currents above mA, which is fine here.


When the Arduino pin is low, I measure around 14 volts across both transistors, which is fine.

Hi, This is what you are looking for. Oh, hang on a second. I use supply with internal control voltage I think, so dagasheet first image.

Problem driving a 12V/20mA frequency inverter with BC transistor

So I’d need to figure out a 14V datashheet supply NEW Library to make fading leds a piece of cake https: If its isolated and it provides its own power, you can very simply use an NPN to switch it. So 20 indeed is a positive supply voltage pin, as it’s labeled Vcc. MarkT Brattain Member Posts: Test code I’m sure there’s nothing wrong with that because I tested the output with a multimeter, 4.

Q1 is PNP transistor Tom Circuit Of course I’ve googled around a lot, and found a lot of examples to control a dc motor with a transistor like this.

MarkT on Jul 13, Android app included, hooray for ethernet shields. Sorry for the bumping, but I just measured some things.