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(...) No, it will use just one '374 enable. -Fred (29 years ago, 12-Jul-96, to lugnet.robotics.handyboard)
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| | Re:
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(...) search on "h-bridge" they have a H-bridge that can handle 3A @ 55vdc. I don't know if it can be piggybacked with driver transisters or not but the wonderfull part is if you would like they will send you FREE samples (3ea at a shot, with up to (...) (29 years ago, 12-Jul-96, to lugnet.robotics.handyboard)
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| | Re: status of the expansion board
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Hi I think that Fred's idea for the expansion board is OK, but I'd also like to see a "bare-bones" expansion board for those hardware hackers amongst the HB community. What I mean is just a simple board with a few more analog input's, and two sets (...) (29 years ago, 12-Jul-96, to lugnet.robotics.handyboard)
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| | Malloc
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I'm trying to allocate three large arrays to store data in... Such as the following declared globally: char stoA(4000); char stoB(4000); char stoC(4000); and then some code...not very long, just to capture data and store it in these arrays from the (...) (29 years ago, 12-Jul-96, to lugnet.robotics.handyboard)
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| | Re: Malloc
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8K might be all that IC allows for user global data. The memory map can be rearranged, but only at the compile-time of the IC application. Newton Labs should be able to give you a definitive answer about the memory organization of IC 3.1. -Fred In (...) (29 years ago, 12-Jul-96, to lugnet.robotics.handyboard)
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| | IC memory map
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(...) Right now, IC reserves 16k for shared code and data space. 8k is for the multitasking stacks and interaction download space, and 8k is for pcode. -- Randy (29 years ago, 12-Jul-96, to lugnet.robotics.handyboard)
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| | tables
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Hi, Can anyone tell me how to store a big table of data that the handy board has collected into a file for permanent storage? Thanks, -Dirk (29 years ago, 13-Jul-96, to lugnet.robotics.handyboard)
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| | HB
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(...) connections so i am at a loss for knowing which leads to test. (...) (29 years ago, 15-Jul-96, to lugnet.robotics.handyboard)
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| | Re: HB
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HI Check for a short between pin 11 of the 'hc374 and +5V. Pin 11 is supposed to be connected to pin 9 of the 'hc138. It is the select line for the 8 flip-flops in the 374. If you have a logic probe, check either of these pins. They should be (...) (29 years ago, 15-Jul-96, to lugnet.robotics.handyboard)
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| | strange encoder problem
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I'm using a hall effect sensor as a shaft encoder. 8 magnets have been placed on a wheel of my bot, such that they turn the sensor on and off as they pass by. I have written a small program to test the encoder, which makes the robot go forward 10 (...) (29 years ago, 15-Jul-96, to lugnet.robotics.handyboard)
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| | sony ir
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Thanks to Joeo for the hints on caputuring data from the handyboard. I have another question: Why does my sony infrared system stop working after calling a function which I have defined in an icb file? I have a number of functions defined in that (...) (29 years ago, 15-Jul-96, to lugnet.robotics.handyboard)
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| | Re: sony ir
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Dirk, Without actually seeing your icb function, it would be hard to determine exactly what is going on. But here are some guesses: 1) When you are modifying control registers in MC, make sure that you use bit commands so that you don't set or erase (...) (29 years ago, 16-Jul-96, to lugnet.robotics.handyboard)
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| | Serial Com.
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The FAQ has information on sending and receiving info thru the serial port. My Question is: How do I do the other end in C. This is what I got the computer side of the serial cable: port = open("/dev/ttyS3",O_RDWD); <- THis is from my head, not (...) (29 years ago, 16-Jul-96, to lugnet.robotics.handyboard)
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| | Handyboard Kit.
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Hi to everyone, I just got my Handy Board Kit and going through the very first step of the assembly i found the first problem. In the handy board assembly instructions it describes capacitors C15 and C16 as 4.7uF Tantalum capacitors but in my kit (...) (29 years ago, 17-Jul-96, to lugnet.robotics.handyboard)
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| | encoders
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So, nobody has any experience with hall effect sensors as encoders, eh? :-) (29 years ago, 17-Jul-96, to lugnet.robotics.handyboard)
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| | Re: Handyboard Kit.
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(...) That is a mistake in the directions. They should be 47uF axials, like you have. I will fix this now. -Fred (29 years ago, 17-Jul-96, to lugnet.robotics.handyboard)
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| | encoders
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(...) if your counting program is written in IC, and not assembly lang, it might be too slow and occasionally miss counts. -F (29 years ago, 17-Jul-96, to lugnet.robotics.handyboard)
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| | Servo Motor
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Hello! Could anybody please tell me the proper step in controlling the servo motor by HB ? ^s I connected the servo motor to the HB and typed in the servo motor control functions but none of them are working... Thanks in advance. (29 years ago, 17-Jul-96, to lugnet.robotics.handyboard)
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| | Where can I get GP1U52X IR sensors?
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Hello there Handyboard users in the world, I read a lot about these IR sensors: Sharp GP1U52 or GP1U56Y. I would like to use some of these sensors in my own robot, that I build around a 8051 and a Forth interpreter. Now it has a few bumper switches (...) (29 years ago, 17-Jul-96, to lugnet.robotics.handyboard)
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| | Re: Servo Motor
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Hi Hajime, Here's the rundown for connecting the servo to the Handy Board: 1) Assuming you're using digital port 9, you will need a connector like this: _ =====| |== <--- connect the WHITE wire from the servo here | | <--- remove pin to polarize (...) (29 years ago, 18-Jul-96, to lugnet.robotics.handyboard)
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