 | | Re: 9.6V POWER AND 9V MOTORS
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(...) Measure the resistance of the motor's windings. Motors are typically rated in max current, NOT max voltage. Take any voltage and divide it by the winding resistance to get the current the motor will draw at stall (and when it is initally (...) (25 years ago, 29-Sep-99, to lugnet.robotics.handyboard)
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| | 9.6V POWER AND 9V MOTORS
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Question? The 9.6v battery in the HB is ideal for running 9v motors, correct? So wouldn't it be true that the motors of an R/C car which also has a 9.6v battery be 9v??? How do you go about finding the voltage and current drawn in a DC motor??? (...) (25 years ago, 29-Sep-99, to lugnet.robotics.handyboard)
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| | Re: PCODER22.S19
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Your loading the wrong pcode file, you need to load pcode_hb.s19, not pcoder22.s19 Matt -----Original Message----- From: Paul DaCosta <germano@voicenet.com> To: Handyboard <handyboard@media.mit.edu> Date: 28 September 1999 16:57 Subject: (...) (25 years ago, 28-Sep-99, to lugnet.robotics.handyboard)
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| | PCODER22.S19
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hey everyone, i need help i cannot download ic to my hb, i followed the instructions, but it doesn't work. I keep getting a message like this" cannot find file pcoder22.s19" what's up with this, can someone tell me the right way of downloading ic to (...) (25 years ago, 28-Sep-99, to lugnet.robotics.handyboard)
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| | Lo-Tech for Hi-Tech swaps, anyone?
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I plan to use the Handyboard within a Course on Interfacing, Microcontroller and Assembly Language Programming at undergraduate level here, starting next month. It turns out that there is a PCB production facility here in Zimbabwe which is now (...) (25 years ago, 28-Sep-99, to lugnet.robotics.handyboard)
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| | (canceled)
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| | hbtest.c
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Hi, I'm assembling a handyboard and am at the stage where the digital inputs are tested using the testdigitals() function of hbtest.c. The test partially works, and I get the beeps after pressing the start and stop buttons, but when I jumper the (...) (25 years ago, 28-Sep-99, to lugnet.robotics.handyboard)
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| | Re: Problem with bootstrap mode
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Hi Raj - - Trickle charge the battery for awhile (with the HB turned off), then try it again. Good luck, - Nick - (...) (25 years ago, 27-Sep-99, to lugnet.robotics.handyboard)
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| | Problem with bootstrap mode
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Hi I am having hard time in putting my handyboard in bootstrap mode. I didn't used my board in months , so it run out off power. when i tried to use it display is not working properly. The first line of the display is not working. when i swithed on (...) (25 years ago, 27-Sep-99, to lugnet.robotics.handyboard)
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| | Re: Analog I/O as Digital I/O
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Also, the "digital(int p)" extends to the analog ports too. When used with a port that is analog in hardware, it just uses 127 as a threshold value to return 1 or 0 (note below 127 returns true). See page 22 in the HB manual. However, with this (...) (25 years ago, 27-Sep-99, to lugnet.robotics.handyboard)
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| | Re: Analog I/O as Digital I/O
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(...) Since the analog inputs read voltage levels, you should be able to just plug in any switch or 5-0volt input directly. To read the values, use the analog command, and in theory you should only get two possible values, 255 for +5volts, and 0 for (...) (25 years ago, 27-Sep-99, to lugnet.robotics.handyboard)
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| | Analog I/O as Digital I/O
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Can the analog input lines be used as a digital input lines (if there is no requirement of analog input)? Because, these lines are connected to the port E of 68hc11, then what are modifications required in the code? Asim Kar. City University of Hong (...) (25 years ago, 27-Sep-99, to lugnet.robotics.handyboard)
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| | Serial transmiter
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Does anyone know of a 9600(8,N,1) serial port transmitter? Or have plans for one? I need one for a telepresence robot that I am designing, Also it needs to be as high of power as it can be I am a HAM novice if it makes a difference Andrew Holland (...) (25 years ago, 25-Sep-99, to lugnet.robotics.handyboard)
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| | Re: Using 12V supply with Expansion Board?
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Duhhhh....don't forget to put heat sink on the 293 motor drivers or else you will fry it! Thank You Bart Chrijver for the reminding. Rob (25 years ago, 25-Sep-99, to lugnet.robotics.handyboard)
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| | Re: Using 12V supply with Expansion Board?
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At 12:13 AM 9/25/99 -0700, you wrote: I've look at the electrical schematic for both the Handy Board and Expansion and this is what I got. Because the expansion board only share the handy board's motor output for its Servo outputs, I don't think you (...) (25 years ago, 25-Sep-99, to lugnet.robotics.handyboard)
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| | [OT] HandyBoard batteries
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Hi All: Found: An excellent source for inexpensive HB batteries. They are new 2 AA (800mAh) cells in series for US$0.99 each. I bought 12 of them for $7.14 ... connected four of them in series and added a female connector ... added a male connector (...) (25 years ago, 25-Sep-99, to lugnet.robotics.handyboard)
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| | Re: error when loading *.icb file
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this is a known problem. see the FAQ: (URL) your message you said: (...) (25 years ago, 24-Sep-99, to lugnet.robotics.handyboard)
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| | Re: error when loading *.icb file
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I had the same problem. When I run as11-ic on my MAC, I have no problem. When I do it on an IBM clone, I cannot load it into the Handy Board. I fixed it by hand-editing out the comment line (its in human language) in the generated .s19 file and it (...) (25 years ago, 24-Sep-99, to lugnet.robotics.handyboard)
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| | EXTENSION BOARD
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I every one, I have a problem, is it possible to have an extension board connected to the HB, and at the same time have a seperate motor power source? The reason I'm asking this is because that the "seperate motor power source" and "extension board" (...) (25 years ago, 24-Sep-99, to lugnet.robotics.handyboard)
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| | error when loading *.icb file
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Hi, I have downloaded the as11 assembler. When I assemble a *.asm file, a *.icb file was created. Then I whated to load the file in the HB but the message "Fatal internal error: Illegal line in .s19 file" was dispayed on the monitor. What's the (...) (25 years ago, 24-Sep-99, to lugnet.robotics.handyboard)
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