push button stearing?

Jayguy5000

i currently have 2 push buttons atop the breadboard on my lovely boe bot. So far the two buttons can turn right left and when both pressed it goes forward! but the hang up is making it go backwards as well with only 2 buttons. Im sure one of you smart fellers out there can figure something out for me

Bruce Bates

JayGuy5000 -

Does a small and inexpensive, but durable surplus joystick like that below appeal to you?
http://www.aaaim.com/u/web/aaaimc/cgi-local/shop991/shop.pl/SID=854235937/page=MISC.htm#JS9850

Just one thought that can probably be implemented easily with the RCTIME instruction, or by using a couple of ADCs.

Regards,

Bruce Bates

KenM

With two buttons, at a minimum you can have 4 distnct operations.

b1 b2 action

0·· 0· left

0·· 1· right

1·· 0· reverse

1·· 1· other

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Ken

Paul Baker

Ken hit the nail on the head, there are 4 total possible combinations of two buttons, though I would define the motions as such (1 is pressed button, 0 not pressed, switch these two if you have an active low setup for your button)

0· 0· forward

1· 0· left

0· 1· right

1· 1· reverse

left button controls·left servo, and right button controls right servo.·If button is 0, servo is full forward, if button is 1, servo is in full reverse. This setup will cause your turns to be the "pivot in place" type since one servo will be going forwards while the other is spinning in reverse. You'll also note there is no unused·combination of buttons availible to represent a "stop".


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·1+1=10

Amaral

You can use “two clicks” on each on of then , this will increase your possibilities to at least 6 ( may no not be possible to reach 1 1 at the same time , { I mean , it could be very hard to achieve } ) .

But this way , you could change for:

Two clicks left = go left
Two clicks right = go right
One click left OR right = go forward ´ note that you will be using two commands here could be just one
Two buttons clicked together = go back
Two buttons left without click = stop

5 operations . it’s all you need.

Ricardo Amaral