MathGeek said:
74C139 stacked 3 times.
Cost: 20 cents each x 3 = 60 cents.
Each stack can control two motors forward and backward. Actually, I think up to 4 non-simultaneous motor controll is possilble.
this may be your simplest solution. I am planning to use 16F628 with 74C139 to control 8 motors total for my 4 legged walker.
k ... could anyone explain more about 74C139 and wat does it do .. im very new to microcontrollers.. tell u wat i have to do ... and probably u could explain how i can go about doing it ... im designing a microcontroller controlled wheelchair.. i have lots of questions
1.how does a microcontroller control the motors??
2.my whole project is made up of 3 parts..
a)the microcontroller
b)the wheelchair
c)human body( as the human body moves, it mechanically varies the potentiometer, but i dont know how the varying of the potentiometer sets the direction of the wheelchair)
how does the MC sense the movement to control the wheelchair??