 | | HB died - help needed
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Hi HBoarders! I have some troubles with my HB. I have set it up together with the expansion board, and it worked properly and very fine. Then once, unfortunately, the LCD, connected to the expansion board, touched one of the five motor-power diodes, (...) (25 years ago, 28-Dec-99, to lugnet.robotics.handyboard)
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| | I have a handy board and a memory problem
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I have installed the memory and am on the test where i try to download a program and start up the handy board..... (have it calculate 1+2;) The pcode and everything install properly but when i cycle the power, i get nothing, no beep, and the LCD is (...) (25 years ago, 28-Dec-99, to lugnet.robotics.handyboard)
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| | Interactive C and P-code
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Hi all, I have just startded using a Handy Board. In the technical specification it says "IC compiles into P-code, which is then interpreted by the run-time machine language" 1. What exactly is p-code. i mean the format etc.? 2. Is C and assembler (...) (25 years ago, 28-Dec-99, to lugnet.robotics.handyboard)
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| | Handy Board Kits ??
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To all you people out in robo land was wondering if any of you know were to find some cheap handy board kits? Ive got PCBs Im just looking for 3 complete sets of parts , or if PCBs are included thats fine as well. thanx in advance Roboman- PS; Do (...) (25 years ago, 27-Dec-99, to lugnet.robotics.handyboard)
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| | Re: speed control bytes
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Fram my reading of the pcode interpreter source, you only get the option of doing all motors or none by default. It doesn't look like it would be too difficult to modify the pcode to only do the first two motors. You can get the source at: (...) (25 years ago, 22-Dec-99, to lugnet.robotics.handyboard)
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| | Re: unknown error
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One obvious thing is that you must declare your local variables at the start of the function before any statements. Gary Livick (...) (25 years ago, 21-Dec-99, to lugnet.robotics.handyboard)
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| | unknown error
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i've IC version 2.82. whenever i load the program below, it keeps giving me an error on the line which 'INT SPEED_TABLE[]' is declared. what's wrong?? void main() { int i; start_press(); int speed_table[]= {0b00000000, (...) (25 years ago, 21-Dec-99, to lugnet.robotics.handyboard)
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| | speed control bytes
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i understand that when the PWM is off, the mask: 0b11111111 switches all motor ports on in the forward direction. but if the PWM is on, what bit string correspond to what speed? is it possible to have motor ports 0 and 1 controlled using PWM while (...) (25 years ago, 21-Dec-99, to lugnet.robotics.handyboard)
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| | pneumatic info
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Does anyone know of a good web site or book on basic design or general information about pneumatic systems. Thanks (25 years ago, 21-Dec-99, to lugnet.robotics.handyboard)
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| | system_pwm_off
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The 'system_pwm_off' function comes standard with the 'lib_hb.c' file. this function switches the PWM off for all the motor ports. is it possible to turn the pwm off for a specific motor port while the others are able to run with PWM? i've a DC (...) (25 years ago, 21-Dec-99, to lugnet.robotics.handyboard)
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| | Motor driver circute problem Using L298N
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Hi guys, I built a Hbridge motor driver using the IC L298N. But it is not working properly. It is swithcing properly with the inputs but it is not drawing the current required for the motor. I am sensing the out Voltage as 8v but when i connect the (...) (25 years ago, 21-Dec-99, to lugnet.robotics.handyboard)
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| | Re: Advice
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Need more information. What kind of "light" sensors are you referring to? CdS cels, IR light sensors, active sensors? There is alot of information on wiring sensors in the Handyboard manual available in the Documentation section of the MIT (...) (25 years ago, 20-Dec-99, to lugnet.robotics.handyboard)
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| | Advice
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How do I connect the light sensors to the board correctly? Cheri Burch (25 years ago, 20-Dec-99, to lugnet.robotics.handyboard)
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| | Re: Futaba or Hitec servos
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(...) As always with the "what is better" question, I must ask... What do you mean by "better"? They will operate the same, I think they have the same cable pinout. The Hitec ones are cheaper usually, but a little larger for the same specs. At the (...) (25 years ago, 19-Dec-99, to lugnet.robotics.handyboard)
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| | Re: Shaft Encoders
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(...) While I am not familiar with the LEGO Rotation Sensor (simply because I havn't got one yet), I have constructed, for the moment, a "homebrew" rotation sensor. My recent models have mostly been models of the robots we build at work. They are (...) (25 years ago, 18-Dec-99, to lugnet.robotics, lugnet.robotics.handyboard)
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| | Futaba or Hitec servos
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Hello, Which ones are better? Advantages/Disadvantages Are there any alternatives that operate the same way? Please share some experience. Thanks for any! :) (...) This message is for the named person's use only. It may contain confidential, (...) (25 years ago, 18-Dec-99, to lugnet.robotics.handyboard)
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| | HB heat problems, HB connectivity problems (Mac)
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I have two HandyBoards. One is having a severe heating problem on the second from the bottom chip on the left side. It is getting to the point that after a few minutes of being on, it is painful to touch. All of the solder points to that chip appear (...) (25 years ago, 17-Dec-99, to lugnet.robotics.handyboard)
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| | Re: Help with IR receive
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thanks for the help. I just breadboarded the circuit with the RC circuit and the instability has gone away. Now I have to get the extra components on to the HB :) see the datasheet for details: (...) (25 years ago, 17-Dec-99, to lugnet.robotics.handyboard)
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| | Shaft Encoders
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Can somebody provide links to Information on Shaft Encoders. Thanks Kalyan Mulampaka Software Engineer e GE Information Services ___...___ Ph#: (770) 698 4436 (O) (770) 390 0887 (R) (25 years ago, 17-Dec-99, to lugnet.robotics, lugnet.robotics.handyboard)
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| | Re: Help with IR receive
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(...) substitute (...) These are NOT optional components. I saw the same thing with the IS1U60 if I didn't use the 47uf/47ohm low-pass filter on the Vdd input to the part. Use it, your problem will go away. have fun, DLC (25 years ago, 17-Dec-99, to lugnet.robotics.handyboard)
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