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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Where is the datasheet for this drive?

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

Is it opto isolated? If its isolated and it provides its own power, you can very simply use an NPN to switch it. I just bought some PNP transistors and made a high side switch now, using a circuit for example from Stackexchange.

So 20 indeed is a positive supply voltage pin, as it’s labeled Vcc. TomGeorge Design and Repair of industrial control systems.

MarkT on Jul 13, Is that the way to go? 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. Don’t try to switch the 12V, switch the GND and you are all set.


I use supply datasheeet internal control voltage I think, so the first image. If it doesn’t provide its own power you have to provide at least 12V externally and high-side switch it.

Android app included, hooray for ethernet shields. NEW Library to make fading leds a piece of cake https: Test code I’m sure there’s nothing wrong with that because I tested the output with a multimeter, 4.

BC517 – BC517 NPN Darlington Transistor

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. Sorry for the bumping, but I just measured some things. Now looking at the second picture, and there I can switch the connection to ground. Hi, Datasgeet is what you are looking for.

BC517 Datasheet, Equivalent, Cross Reference Search

Thanks Tom, nice find, only one darasheet further Project Would someone be interested why, I’m trying to control the solar panels at home to get bc157 always at an optimal angle.


Q1 is PNP transistor Tom Use fricking code tags!!!! When the Arduino pin is low, I measure around 14 volts across both transistors, which is fine. So since I want to switch the ground, I need to intercept the connection somewhere right?

We also replaced the transistor just in case it was broken, and tested some other crucial connections, although not all. So I’d need to figure out a 14V power supply Actual result Unfortunately the motor always starts when I connect the transistor, even if the base is connected to the Arduino ground.

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.

You’ll have to find out whether the digital section is opto-isolated with a multimeter. Transistor The first time I connected the transistor without the base resistor, and I don’t think I’ve blown it but who knows Everything runs on smoke, let the smoke out, it stops running PHPirates on Jul 13, Possible problem points I thought about: But now the motor doesn’t do anything