 | | Re: Reducing Battery Pack Voltage
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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)
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| | motor voltages
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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)
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| | Re: IR Collision avoidance
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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)
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| | Re: IR Collision avoidance
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(...) 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)
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| | Re: IR Collision avoidance
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(...) What are the three LED's for? (28 years ago, 28-Feb-97, to lugnet.robotics.handyboard)
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| | Re: use of single power source op amp circuits with the Handy Board
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(...) 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)
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| | Printed circuit board
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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)
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| | help.......analog expansion header
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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)
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| | help ....use of op amp circuits with the Handy Board
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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)
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| | use of single power source op amp circuits with the Handy Board
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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)
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| | LCD display
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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)
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| | Re: timing
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(...) 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)
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| | timing
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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)
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| | Re: IR collision avoidance
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(...) 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)
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| | Re: IR collision avoidance
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(...) ** 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)
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| | analog expansion header
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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, 27-Feb-97, to lugnet.robotics.handyboard)
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| | SPI Interrupts (Vector2X)
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I am at it again! I am trying to get the Vector2X working on the SPI bus of the handy board. I have read the docs, and they seem to make sense, however, I cannot get the code to work. I have the Vector2X running as a master, my assumption is that (...) (28 years ago, 26-Feb-97, to lugnet.robotics.handyboard)
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| | Re: handy board analog inputs
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yes, they do. In case you didn't know, schematic diagrams for the Handy Board are available from the web site. They show this wiring, including the fact that the user knob is wired to PE7. -Fred -- This message was composed using Articulate Systems' (...) (28 years ago, 26-Feb-97, to lugnet.robotics.handyboard)
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| | handy board analog inputs
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Hello, I am trying to run an assembly language program on the handy board without IC. Do the analog inputs on the handy board, marked 0-6 on the board correspond exactly to PE0-PE6 on the chip? Does the 0 input of J1 go directly to the PE0 pin? I (...) (28 years ago, 26-Feb-97, to lugnet.robotics.handyboard)
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| | Adding Functions to IC
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Is there a way to add functions to IC? Maybe they're already somewhere that I am not aware of. I need to add ir_xmit_on and ir_xmit_off to my functions list. I know that I can poke them but I just wondered if they were already on a functions list (...) (28 years ago, 26-Feb-97, to lugnet.robotics.handyboard)
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