 | | 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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| | 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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| | 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, 26-Feb-97, to lugnet.robotics.handyboard)
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| | Umsubscribe
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Please unsubscribe me from the mailing list. (28 years ago, 25-Feb-97, to lugnet.robotics.handyboard)
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| | Turning IR xmitter on and off
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Hi all, I've had a few questions on this. The ir_xmit_on and ir_xmit_off routines that I use are in hb_ir.c. You could easilly write them yourself - ir_xmit_on just does poke(0x1000, 0x40) and ir_xmit_off does poke(0x1000, 0). Note that in hb_ir.c (...) (28 years ago, 25-Feb-97, to lugnet.robotics.handyboard)
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| | sonar,radar
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Hello, I am building a robot with the handyboard at school with my lab parteners. you have seen them on the list before. Jim T., and Richard Vannoy. Our robot is doing fine with the IR's and bumpers. We have the handyboard software for sonar, but do (...) (28 years ago, 25-Feb-97, to lugnet.robotics.handyboard)
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| | Re: Motor Speeds
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(...) When I built the PWM controller out of a PIC I gave it 100 speeds representing 0 - 100% width. So a speed of 50 is a 50% duty cycle signaal. The disadvantage of the Handiboard scheme is granularity. In particular I have found that for really (...) (28 years ago, 25-Feb-97, to lugnet.robotics.handyboard)
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| | Re: IR Collision avoidance
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(...) OK. (...) The transmitter is basically a modulator made from two 555 timer chips. One timer does 200-1000 Hz (we use 500) while the other does 38 KHz. On a scope, the output looks somewhat like.. |||...||| |||...||| |||...||| | | | | | | | | | (...) (28 years ago, 25-Feb-97, to lugnet.robotics.handyboard)
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| | Re: IR collision avoidance
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Some comments and a few questions for Chris (...) We have "forward" and 45 degrees right". We wall hug to the right while you hug to the left. We ignore IR to left and use only the left contact switch for collisions (rare). (...) We had way too much (...) (28 years ago, 25-Feb-97, to lugnet.robotics.handyboard)
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| | Re: IR Collision avoidance
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The Handyboard has a circuit (U7a, R4, C6) that generates a 38KHz signal. That drives an amplifier that then goes to J7, the IR LED output. If you hookup an IR LED to this jack (with a series resistor) then when you turn on TOC2 using ir_xmit_on() (...) (28 years ago, 24-Feb-97, to lugnet.robotics.handyboard)
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| | Re: IR collision avoidance
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(...) I don't have the RS part numbers, but I bought them within the last few months so if there are "old" and "new" ones mine are probably "new". I checked out the RS web page and found that what they currently have is RS part number 276-137, and (...) (28 years ago, 24-Feb-97, to lugnet.robotics.handyboard)
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