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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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. So 20 indeed is a positive supply voltage pin, as it’s labeled Vcc.

Everything runs on smoke, let the smoke out, it stops running So since I want to switch the ground, I need to intercept the connection somewhere right? I just bought some PNP transistors and made a high side switch now, using a circuit for example from Stackexchange.

Test code I’m sure there’s nothing wrong with that because I tested the output with a multimeter, 4. Sorry for the bumping, but I just measured some things.

BC Datasheet, Equivalent, Cross Reference Search. Transistor Catalog

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. So I’d need to figure out a 14V power supply PHPirates on Jul 13, NEW Library to make fading leds a piece of cake https: I use supply with internal control voltage I think, so the first image.


TomGeorge Design and Repair of industrial control systems. 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. Hi, This is what you are looking for.

If it doesn’t provide its own power you have to provide at least 12V externally and high-side switch it. Expected result There should flow current to the controller enable when the Arduino puts 5V on the transistor, and not so otherwise.

Oh, hang on a second. MarkT Brattain Member Posts: Is it opto isolated? Actual result Unfortunately the motor always starts when I connect the transistor, even if the base is connected to the Arduino ground. We also replaced the transistor just in case it was broken, and tested some other crucial connections, although not all.

If its isolated and it provides its datashedt power, you can very simply use an NPN to switch it. But now the motor doesn’t do anything Don’t try to switch the bx517, switch the GND datashwet you are all set.


BC517 Datasheet, Equivalent, Cross Reference Search

Use datawheet code tags!!!! Transistor The first time I connected the transistor without the base resistor, and I don’t think I’ve blown it but who knows Thanks Tom, nice find, only one page further You’ll have to find out whether the digital section is opto-isolated with a multimeter.

MarkT on Jul 13, Where is the datasheet for this drive? Now looking at the second picture, and there I can switch the connection to ground. Q1 is PNP transistor Tom Is that the way to go?

Android app included, hooray for ethernet shields. Project Would someone be interested why, I’m trying to control the solar panels at home to get them always at an optimal angle. When the Arduino pin is low, I measure around 14 volts across both transistors, which is fine. Possible problem points I thought about: