Subject:
|
Re: Adapting the LMD18200
|
Newsgroups:
|
lugnet.robotics.handyboard
|
Date:
|
Sun, 29 Sep 1996 03:26:57 GMT
|
Original-From:
|
Matt Harlan <mjh10@cornell&Spamcake&.edu>
|
Viewed:
|
1469 times
|
| |
|
|
Tom
I got a couple LMD18200's from National and I'm getting ready to connect
them to my HB. Looking back in my list of messages I got this:
> What I did was simply remove the L293 chip and replace it with a 16pin
> header and some rainbow ribbon cable.
>
> I looked at the schematic and found the L293's really only use 2 pins
> for input. For motor 3, it is pins 1 and 2, and for motor 2 it is
> pins 9 and 10.
This part is OK, but I'm not sure about the rest.
>
>
> ------
> /| |-----
> / | |---------- Motor
> / | LM |-----
> / |182 |-----
> / | 00 |--------GND (motor and signal)
> | * | |--------motor power (12-55V)
> \ | |--------hb pin 2
> \ | |----- gnd (brake)
> \ | |--------hb pin 1
> \ | |---------- Motor
> \|pin1|-----
> ------
>
> Pins 2 and 10 connect directly to the motor. Pin 3 is pwm, which is
> compatible with handy board pwm output. Pin 4 is a brake, and could
> be connected to the handy board using one of the digital inputs, but
> I decided to not use it. pin 5 is direction which is compatible with
> the direction output on the handy board. Pin 6 is motor power, you
> should make all your needs available here. Pin 7 is ground, signal
> and motor power. Pin 8 is a current sense that might be useful into
> an A/D port (properly scaled of course), and Pin 9 is a thermal flag
> that could set off an interrupt or other digital input.
>
> >
> --
> tgb@bnr.com
The PWM inputs for each L293 are pins 1 & 9, right? And the direction
inputs are 2, 7, 10, & 15? With each pair of direction inputs using an
inverter.
The data sheet from National gives pin 3 as direction and pin 5 as PWM.
Did you connect it like in the picture or is the picture wrong.
I thought I would ask before a I etch my board for the 18200's.
Thanks,
matt
_______________________
Matthew J. Harlan
Cornell University
Electrical Engineering
mjh10@cornell.edu
|
|
Message has 1 Reply:
2 Messages in This Thread:
  
- Entire Thread on One Page:
- Nested:
All | Brief | Compact | Dots
Linear:
All | Brief | Compact
|
|
|
|
