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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If its isolated and it provides its own power, you can very simply use an NPN to switch it.
But nc517 the motor doesn’t do anything MarkT on Catasheet 13, So I’d need to figure out a 14V power supply Is that the way to go? MarkT Brattain Member Posts: Test code I’m sure there’s nothing wrong with that because I tested the output with a multimeter, 4.
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.
I just bought some PNP transistors and made a high side switch now, using a circuit for example from Stackexchange. PHPirates on Jul 13, I use supply with internal control voltage I think, so the first image. Project Would someone be interested why, I’m trying to control the solar panels at home to get them always at an optimal angle.
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. Thanks Tom, nice find, only one page further 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.
If it doesn’t provide its own power you have to provide at datashewt 12V externally and high-side switch it. TomGeorge Design and Repair of industrial control systems. Android app included, hooray for ethernet shields.
We also replaced the transistor just in case it was broken, datashee tested some other crucial connections, although not all.
datashedt Is it opto isolated? Don’t try to switch the 12V, switch the GND and you are all set. Now looking at the second picture, and there I can switch the connection to ground. Use fricking code tags!!!! When the Arduino pin is low, I measure around 14 volts across both transistors, which is fine.
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. Oh, hang on a second.
Possible problem points I thought about: Expected result There should flow current to the controller enable when the Arduino puts 5V on the transistor, and not so otherwise. Hi, This is what you are looking for.
Where is the datasheet for this drive? Q1 is PNP transistor Tom You’ll have to find out whether the digital section is opto-isolated with a multimeter. NEW Library to make fading leds a piece of cake https: So since I want to switch the ground, I need to intercept the connection somewhere right? Transistor The first time I connected the transistor without the base resistor, and I don’t think I’ve blown it but who knows So 20 indeed is a positive supply voltage pin, as it’s labeled Vcc.
Sorry for the bumping, but I just measured some things.