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Topic: 2 direction transistor (Read 1 time) previous topic - next topic


Hello again to evryone in Arduino Open Source Community,I have one modded servo and I want threw transistor to control one motor forward and backward is that posible is there a transistor who have two path PNP and NPN.
The other question is my servo has only 2 cables for the electricity (+) and (-) before I had 3 one orange more who was for the signal. What can I do to back it and my servo go on fully rotate not only 90 degrees.


Is there a other way to control the motors forward and backward,because the IC L293 is not compatible for me.
Is there a way with transistors.


There's this too:


My New Arduino Book: http://www.arduinobook.com


Somebody recently posted the below h-bridge design which looks interesting.

Consider the daffodil. And while you're doing that, I'll be over here, looking through your stuff.   8)


Ok I am intrested on this project : http://www.youtube.com/watch?v=uyMc0cLKQtI&feature=related can someone please telm me how he controls the motors.


Okey I understand,but I want to ask for last time the following thing:

If I take 2 transistors 1 pnp and 1 npn and program the microcontroler how to use them will I can do it by this way to control the motors forward and backward.


How can you say that the h-bridge is smaller ?
One h-bridge control only one motor I will need 2 of them to make that what I wan't.

To make one H-Bridge I have to use somethink like this schematic:

And two of them on any PCB,BREADBOARD or something isn't smaller maybe,are the best solution,for some other need but not in mine situation.


My only constraints is the space I wan't this project to be as slim as it can be (I know I don't use as-as right but I can remeber now for any comparison.).
Maybe I will read some schem. or something and will build in future some H-bridge,but only the time will show.  :)

Which transistor is good too use to creat h-bridge what time pnp and what type npn.


If you need a small h-bridge, it might be best if you purchased on from places like below.



Consider the daffodil. And while you're doing that, I'll be over here, looking through your stuff.   8)


Here is the servo datasheet : http://upload.robotics-bg.com/files/RS-2_servo.pdf

With what combination of transistor I have to use to run 2 of these servo.


Nov 08, 2010, 11:52 am Last Edit: Nov 08, 2010, 06:22 pm by mitko29 Reason: 1
What will hapend if I am using relay.

Then I would be able to change the direction of motor ?


Sorry I add DC I am thinking about DC++ program and by mistake added DC.
Ordinary motor I mean.


Nov 08, 2010, 09:05 pm Last Edit: Nov 08, 2010, 09:12 pm by mitko29 Reason: 1
Doestn't matter lock it.

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