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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Now looking at the second picture, and there I can switch the connection to ground.

BC Datasheet, Equivalent, Cross Reference Search. Transistor Catalog

So I’d need to figure out a 14V power supply Is it opto isolated? Expected result There should flow current to the controller enable when the Arduino puts 5V on the transistor, and not so otherwise.

Android app included, hooray for ethernet shields. If it doesn’t provide its own power you have to provide at least 12V externally and high-side switch it. When the Arduino pin is low, I measure around 14 volts across both transistors, which is fine. Where is the datasheet b5c17 this drive?

BC517 Datasheet, Equivalent, Cross Reference Search

I use supply with internal control voltage I think, so the first image. You’ll have to find out whether the digital section is opto-isolated with a multimeter. MarkT datashset Jul 13, Sorry for the bumping, but I just measured some things.

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Actual result Unfortunately the motor always starts when I connect the transistor, even if the base is connected to the Arduino ground.

Project Would someone be interested why, I’m trying to control the solar panels at home to get them always at an optimal angle.

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

Is that the way to go? If its isolated and it provides its own power, you can very simply use an NPN to switch it. Possible problem points I thought about: Q1 is PNP transistor Tom Everything runs on smoke, let the smoke out, it stops running Test code I’m sure there’s nothing wrong with that because I tested the output with a multimeter, 4.

So 20 indeed is a positive supply voltage pin, as it’s labeled Vcc. Don’t try to switch the 12V, switch the GND and you are all set.

PHPirates on Jul 13, TomGeorge Design and Repair of industrial control systems. 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.

The circuits look datashedt, 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.


Transistor The first time I connected the transistor without the base resistor, and I don’t think I’ve blown it but who knows Oh, hang on a second. I just bought some PNP transistors and made a high side switch now, using a circuit for example datzsheet Stackexchange.

NEW Library to make fading leds a piece of cake https: But now the motor doesn’t do anything We also replaced dahasheet transistor just in case it was broken, and tested some other crucial connections, although not all. 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.

Thanks Tom, nice find, only one page further So since I want to switch the ground, I need to intercept the connection somewhere right?

MarkT Brattain Member Posts: Use fricking code tags!!!! Hi, This is what you are looking for.