 | | Re: Fun part
|
|
Cappy, (...) I believe that the quickest, most efficient way to get a handle on C is to obtain and begin reading a book called "The C Programming Language" by Brian Kernighan and Dennis Ritchie, ISBN 0-13-110362-8. This small book describes the (...) (28 years ago, 1-Mar-97, to lugnet.robotics.handyboard)
|
| |
| | Fun part
|
|
I just sucessfully finished putting together the handyboard and will say that if one takes their time and is careful-there shoould be no problems. One observation/question. I notice that with the battery installed, the "heartbeat" character on the (...) (28 years ago, 1-Mar-97, to lugnet.robotics.handyboard)
|
| |
| | Reducing Battery Pack Voltage
|
|
Hi Fred I am attemping to run two low voltage DC motors (as motors 0 and 1), around 3V each(I don't have specs). I have piggybacked two of the motor driver chips (and maybe adding a third) to handle the higher current but they are still getting (...) (28 years ago, 1-Mar-97, to lugnet.robotics.handyboard)
|
| |
| | Re: Reducing Battery Pack Voltage
|
|
I think I might have wrote something wrong before. I said that you can use an external battery of 3V. I take it back. Sorry... I didn't realise that it would only work for 6 volts to 36 volts. Ooops. :b ericson mar Master of Engineering Candidate (...) (28 years ago, 1-Mar-97, to lugnet.robotics.handyboard)
|
| |
| | Re: Reducing Battery Pack Voltage
|
|
U can use an external battery with the HB. It can be 3V. Check the FAQ in the HB HP. The exact link is: (URL) mar Master of Engineering Candidate Project: Mobile Robotics mar@cooper.edu Department of Mechanical Engineering The Cooper Union for the (...) (28 years ago, 1-Mar-97, to lugnet.robotics.handyboard)
|
| |
| | Re: Reducing Battery Pack Voltage
|
|
as has been discussed on this list, the Handy Board wasn't really designed for three volt toy motors. Reducing the voltage and doubling the motor chips is a reasonable approach, however. The Handy Board requires 7.2 volts to operate, because of the (...) (28 years ago, 1-Mar-97, to lugnet.robotics.handyboard)
|
| |
| | motor voltages
|
|
Hi, This is in response to the question about motor voltages posted earlier tonight. Check out the archives. Late last week I posted a similar question and got some good responses about wiring the HB for two power supplies and using diodes. I have (...) (28 years ago, 1-Mar-97, to lugnet.robotics.handyboard)
|
| |
| | Re: IR Collision avoidance
|
|
Hmmm. What voltage and/or LEDs are you using? Assuming 5V, your LEDs age passing only around half a milliamp of current. I am using a 100ma LED and I can only get less than a foot of detection. Am I missing something here? Jun Nolasco (...) (28 years ago, 1-Mar-97, to lugnet.robotics.handyboard)
|
| |
| | Re: IR Collision avoidance
|
|
(...) Those are the IR LED's - the one's that transmit the IR light that the receiver sees. Also, while I'm at it, I found out that the diagram above isn't completely accurate (I drew it from memory). The circuit I really use is like this: (...) (28 years ago, 28-Feb-97, to lugnet.robotics.handyboard)
|
| |
| | Re: IR Collision avoidance
|
|
(...) What are the three LED's for? (28 years ago, 28-Feb-97, to lugnet.robotics.handyboard)
|
| |
| | Re: use of single power source op amp circuits with the Handy Board
|
|
(...) The text of your question suggests many possible answers, but I would like to propose a couple of exploratory questions. More importantly it would be useful to have some global state as to what it was you were trying to do. Anyway, you can't (...) (28 years ago, 28-Feb-97, to lugnet.robotics.handyboard)
|
| |
| | Printed circuit board
|
|
Hi, I like to know if there is a posibility to buy a printed circuit board for a Handy Board in Holland, and if there is where can I get it ? Thanks Emiel Agema (28 years ago, 28-Feb-97, to lugnet.robotics.handyboard)
|
| |
| | help.......analog expansion header
|
|
How do you use the expansion header on analog inputs 0 to 3? I could not find specifics on its use in the documentations. Thanks, Nathan Marcantel nathanm@mail.utexas.edu 512-272-8024 6517 Carisbrooke Lane Austin, TX 78754 (28 years ago, 28-Feb-97, to lugnet.robotics.handyboard)
|
| |
| | help ....use of op amp circuits with the Handy Board
|
|
Does anyone know how to get a negative 5 volts from the Handy board for an op amp amplifier circuit or set equations to figure out the gain of an standard op amp as the 741 or LM339 using Vee as ground and Vcc as +5 VDC? The equations only seem to (...) (28 years ago, 28-Feb-97, to lugnet.robotics.handyboard)
|
| |
| | use of single power source op amp circuits with the Handy Board
|
|
Does anyone know how to get a negative 5 volts from the Handy board for an op amp amplifier circuit or set equations to figure out the gain of an standard op amp as the 741 or LM339 using Vee as ground and Vcc as +5 VDC? The equations only seem to (...) (28 years ago, 28-Feb-97, to lugnet.robotics.handyboard)
|
| |
| | LCD display
|
|
Hi, Is there any way to disable the LCD display? Rather the heartbeat. I'm not using the LCD, and I don't want anything printing the the LCD, heartbeat included. Thanks, Maria ---...--- Maria Pirsic IEEE Branch Treasurer 96/97 Carleton University (...) (28 years ago, 28-Feb-97, to lugnet.robotics.handyboard)
|
| |
| | Re: timing
|
|
(...) Mike, Not enough info to determine your problem. Are you using the Output Compare functions, or are you trying to emulate that functionality some way? The OC lines are hardware-set, so they go off whenever the free-running counter matches some (...) (28 years ago, 27-Feb-97, to lugnet.robotics.handyboard)
|
| |
| | timing
|
|
Hi- I'm attempting to write an assembly routine to control a pulse width, but I can't seem to get the timing down. For example, I can output a 3.33ms pulse width, but if I run the routine again, it sometimes jumps to 3.5ms, and then jumps back down (...) (28 years ago, 27-Feb-97, to lugnet.robotics.handyboard)
|
| |
| | Re: IR collision avoidance
|
|
(...) Good question! We had a lot of noise problems and learning curve stumbles along the way. Our first bad news was that we had a range of a few inches. We finally beat that one fooling with frequencies, caps, etc. and then found out our range was (...) (28 years ago, 27-Feb-97, to lugnet.robotics.handyboard)
|
| |
| | Re: IR collision avoidance
|
|
(...) ** My only question is how do you keep the bot at a constant 18 inches ** away from the wall with a collision detection algorithm? Is it ** possible to get analog outputs from a sensor indicating the ** distance from a wall? Or is there is (...) (28 years ago, 27-Feb-97, to lugnet.robotics.handyboard)
|
