 | | pneumatic arms
|
|
Since electric motors running off small, mobile power supplies tend to be weak and slow, I was considering designing a pneumatic arm powered by an onboard container of compressed air. Can anyone tell me where I can obtain pneumatic solenoids (...) (29 years ago, 26-Mar-96, to lugnet.robotics.handyboard)
|
| |
| | Get Alias Info
|
|
Get Alias Info (29 years ago, 26-Mar-96, to lugnet.robotics.handyboard)
|
| |
| | process control question
|
|
Hi all, I used the routines in Mobile Robot as a guide in building routines for my robot. I have an IR detector setup like the one described using the Sharp detector to detect left and right obstacles. I have a round robot with three bumper switches (...) (29 years ago, 26-Mar-96, to lugnet.robotics.handyboard)
|
| |
| | How to run 8 servos by adding one HC chip
|
|
(...) Warning: I haven't tried the following idea. Single chip add-on to control 8 servos using one timer line and a few digital outputs: The 74HC238 is a 3 to 8 demultiplexor. (see (URL) for datasheets). Unlike the more common HC138, its outputs (...) (29 years ago, 26-Mar-96, to lugnet.robotics.handyboard)
|
| |
| | Re: Get Alias Info
|
|
In your message you said: (...) Arghh! The "get alias info" command is on the web pages, i.e., (URL) everyone, remember there is nothing automated about the handy board mailing list. to get on it, I must manually put you there. to get you off it, i (...) (29 years ago, 25-Mar-96, to lugnet.robotics.handyboard)
|
| |
| | Re: pulse trains
|
|
(...) I'm doing signal conditioning for pan/tilt and (ultimately) drive/steer signals from an RC receiver and driving servos with the processed signals. All power for the servos is external, so all I need is signals through the Handyboard. -mike * (...) (29 years ago, 25-Mar-96, to lugnet.robotics.handyboard)
|
| |
| | Re: unsubscribe
|
|
In order to be removed from the Handy Board mailing list, please send e-mail directly to me, Fred Martin. There is no need to announce your request to the entire list. Enclosed are instructions from the mailing list page on the web site. -Fred -- (...) (29 years ago, 25-Mar-96, to lugnet.robotics.handyboard)
|
| |
| | digital output
|
|
Is it possible to use any digital output on the Handy Board without loosing the monitor (or anything else for that matter)? Scott sherman@plains.nodak.edu (29 years ago, 25-Mar-96, to lugnet.robotics.handyboard)
|
| |
| | unsubscribe
|
|
unsubscribe (29 years ago, 25-Mar-96, to lugnet.robotics.handyboard)
|
| |
| | (no subject)
|
|
UNSUBSCRIBE (29 years ago, 25-Mar-96, to lugnet.robotics.handyboard)
|
| |
| | Re: Driving large motors with the Handyboard
|
|
(...) Thanks for the tip. I got a hold of the book and read some of it. :) I was wondering if sending pulses to the motor would cause "choppy" rotation....or does it occur so fast that inertia effects make it "smooth". Also, with an h-bridge, is it (...) (29 years ago, 25-Mar-96, to lugnet.robotics.handyboard)
|
| |
| | pulse trains
|
|
Mike, Out of curiosity, what are you using the pulse trains for? (If you're running multiple servos, I think I know a single-chip hardware mod to drive up to 8 servos from a single timer output.) -- Randy (29 years ago, 24-Mar-96, to lugnet.robotics.handyboard)
|
| |
| | TOC 2 & 3
|
|
AAAARRRGGGHHHHHH!! After the pain of relearning assembler and getting interrupt routines to work, it seems my assumption of the availability of TOC 2 & 3 is incorrect. I need 2 (wanted 4) pulse trains to go out. According to the diagrams Fred (...) (29 years ago, 24-Mar-96, to lugnet.robotics.handyboard)
|
| |
| | Re: OC2 and OC3 outputs?
|
|
Take a look at the schematics, which are linked from the top page of the Handy Board web site. The info you are looking for is in the CPU / memory schematic. For the DC Motor outputs, the board uses a separate output latch---not the timer outputs. (...) (29 years ago, 24-Mar-96, to lugnet.robotics.handyboard)
|
| |
| | DC Motor Position control
|
|
I am wondering if anyone tried to write an IC program for DC motor position control using PID/P or whatever with a handyboard. I am also looking for a good precision DC motor (with encoder and gearbox integrated), I very appreciate your help for any (...) (29 years ago, 24-Mar-96, to lugnet.robotics.handyboard)
|
| |
| | Re: Resets
|
|
The MB design keeps ground in common, but the ground to the cpu, has an inductor in line with it, the HB also has a inductor on the ground side, I think. You might want to put an inductor on both sides of the motor, with a cap inbetween both of (...) (29 years ago, 24-Mar-96, to lugnet.robotics.handyboard)
|
| |
| | Re: Resets
|
|
If I add a separate motor power to the L293's, can I keep the ground lines common? If not, what pins are motor ground? (I know pins 4,5,12, and 13 are ground) Thanks. -John (...) (29 years ago, 23-Mar-96, to lugnet.robotics.handyboard)
|
| |
| | IC for Windows
|
|
(...) We use Microsoft Visual C++ (v. 4.0). -- Randy (29 years ago, 23-Mar-96, to lugnet.robotics.handyboard)
|
| |
| | IC for Windows.
|
|
Just outta curiousity, what was IC Win developed with? (29 years ago, 23-Mar-96, to lugnet.robotics.handyboard)
|
| |
| | Re: Driving large motors with the Handyboard
|
|
There are several ways to do this. In Mobile Robots, they talk about H bridge circuits. If you are doing less than 2A use a L298 and some some clamping diodes ( these keep the driver chip from being fried when you turn the motor off). The L298 has 2 (...) (29 years ago, 23-Mar-96, to lugnet.robotics.handyboard)
|
