Olá pessoal, preciso de uma ajuda com uma coisa simples. Tenho um motor de carrinho 3v, quero saber como controlar usando o arduino. OBS: Tentei com um transistor, quando coloco um LED ele acende, mas quando coloco um motor nada acontece.
Olá pessoal, meu arduino duemilanove chegou hoje, e tô tentando dar um digitalWrite na base do meu transistor 2N3094, ele acende, mas não precisa de voltagem no coletor, ele simplismente funciona :o Alguém sabe o por que?
Ah, e eu queria saber também, porque eu não consigo colocar uma tensão no emissor e coletor, por exemplo, de uma pilha, e usar uma diferente pra base, no caso a do arduino?
Hi, after a long time (like I said) it worked! But when soldering the FTDI pins I destroyed the board a little bit and some pins of the FTDI aren't making contact. I already connected the FTDI to the other TX and RX pins, but don't know what to do with the 2 pins that are missing (the other 2 are VCC and GND). I know one is reset, but which one? And where I connect the other one? (when I connect the FTDI to the broken pins, the green led starts blinking so fast, like with delay(30) Thanks, here's a video:
Thank you so much by the help, but look, thats a vid I made before soldering the pins, with a LED and no resistors:
I tested this sketch so many times, I remember that leave it on by a minutes...
When this same uploading problem happened to my duemilanove, I quitted it, and weeks after, tried to upload to it and worked at the first try. The soldering paste, when heated by the soldering iron, makes a noise. This same noise happened when I saw a smoke, don't know if this smoke comes from the soldering paste gettin hot.
I'm from Brazil and can't pay another $30 shipping for just a arduino pro mini board. And about changing the atmel... I'm not a hero, can't sold that.
The pins are soldered, but nothing is connected to them.
When I connect the board to power, the atmel chip gets hot. In the beggining, I got a smoke from this chip. Now no more. I believe that the soldering paste I used are doing some wrong connections in the chip, but already cleanned it so many times.
I don't know why is the green led on, when I used the board and uploaded a blink sketch, times ago, it never gets on...
I would thank SO MUCH if somebody can help me. That's the only arduino I have and I can't buy another at this moment. (I had a problem like this, months ago, with my arduino duemilanove, gets a smoke at the beggining, when, I believe, the soldering paste gets evaporated completely, it started working again, but after a few days of natural cleanning.)