 | | dc motor output control???...???
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hi everyone, i need some help on controling the output voltage of the dc motor ports. the output voltage is 9.6V and i like to know if there is any way to clamp down the voltage to 5V or lesser. i try using a enternal resistor but the output signal (...) (26 years ago, 19-Dec-98, to lugnet.robotics.handyboard)
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| | Re: LCD configs (was:Suppliers and rf link)
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john calhoun, Mine just arrived and they are 1 X 16 connectors. I ordered 2035TNLD/Y displays for $8.00 each. You might want to order now while they have the 2X16 displays with 1X16 connectors. I have soldered the connector on and tested it and its (...) (26 years ago, 19-Dec-98, to lugnet.robotics.handyboard)
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| | Re: dc motor output control
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Maybe you can put a series of diodes in series and in parallel but the other direction to reduce the voltage. H-bridge +- +- +- +- motor H-bridge -+ -+ -+ -+ Good luck, James (...) (26 years ago, 19-Dec-98, to lugnet.robotics.handyboard)
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| | RE: urgent request help !!!!
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What about the display board itself? Could it be that one of the SMT parts on the board is dead? Or a trace on the LCD is shorted? --phil (26 years ago, 19-Dec-98, to lugnet.robotics.handyboard)
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| | RE: urgent request help !!!!
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-----Original Message----- From: phillip chia [mailto:philchia@sin...et.com.sg] Sent: Friday, December 18, 1998 7:04 AM To: handybd Cc: Mr Peter Lim Subject: urgent request help !!!! Hi Fred and others, I very desperate to debug the problem that (...) (26 years ago, 18-Dec-98, to lugnet.robotics.handyboard)
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| | dc motor output control
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hi everyone, i need some help on controling the output voltage of the dc motor ports. the output voltage is 9.6V and i like to know if there is any way to clamp down the voltage to 5V or lesser. i try using a enternal resistor but the output signal (...) (26 years ago, 18-Dec-98, to lugnet.robotics.handyboard)
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| | Re: Downloader and a/d
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Cesar, (...) According to my book, you can set the reference voltages to anything from Vss to Vss + 6.0 V (notice that this is higher than Vdd). The A/D result is a ratioatic comparison for the sample voltage to the references. Page 48 of the (...) (26 years ago, 18-Dec-98, to lugnet.robotics.handyboard)
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| | Replacing L293D with L298H
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Hi Fred and others, I very desperate to debug the problem that took place in my HD. When I download the P_code, it is successfully downloaded. However, when the next instruction ask to reset the board, no words of sentence appear on the LCD. Only 16 (...) (26 years ago, 18-Dec-98, to lugnet.robotics.handyboard)
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| | Downloader and a/d
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Hi friends! First thank you a lot for the advices on the FingerBoard. It really gets near to what I need, but that ram chip is another headake. So I believe more in a "light" version of the Handyboard right now, later I'll make a specific version (...) (26 years ago, 18-Dec-98, to lugnet.robotics.handyboard)
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| | Re: HD LCD problems
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(...) On a lark, I'll suggest that perhaps U6 is damaged. If you have another 74HC138 around, try swapping it for the one on your HB. I had a "similar" problem (although not identical) and was able to diagnose the 74HC138 as the problem. I too was (...) (26 years ago, 17-Dec-98, to lugnet.robotics.handyboard)
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| | RE: Hot serial interface board
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<<snip>> So here's my question. Does your serial interface board run hot, i.e. noticeably hot to the touch. On my serial interface board (version 1.1 as printed on the board) the white ceramic block gets very hot along with the power chip? in the (...) (26 years ago, 16-Dec-98, to lugnet.robotics.handyboard)
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| | A Poloroid Sonar question.
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I've got a poloroid sonar question. I got a hold of a Poloroid OneStep Sonar camera at the second hand store, but it does not seem to match any of the pinouts I've seen on the Web... This board has 16pins, I believe this board is manufactured by TI. (...) (26 years ago, 16-Dec-98, to lugnet.robotics.handyboard)
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| | Re: Mapping
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Thanks for the tip on reflection error. I'll have to build in a function to weight the position accordingly. I'm trying to stay away from occupency grids and use the native vectors to conserve memory while maintaining accuracy. I may have to resort (...) (26 years ago, 16-Dec-98, to lugnet.robotics.handyboard)
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| | HD LCD problems
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Hi FThompson, Fred and other, I encountered some problem in the downloading. I was successfully able to download the p_code into the HD. However, When the instruction proned me to reset the board,it always appears on the LCD without any lettering (...) (26 years ago, 16-Dec-98, to lugnet.robotics.handyboard)
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| | Re: Beginner's Help
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(...) I've never hot HBDL to work, and I've tried it on a 386 (laptop), 486 and Pentium. Don't know why: just won't work under win3.11 win95 or win98. The DOS one I've used with quite a bit of success. Make sure you are restarting the computer (ie, (...) (26 years ago, 16-Dec-98, to lugnet.robotics.handyboard)
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| | Re: Beginner's Help
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Richard, Thanks for the help. I finally got the board to accept the pcode. I acquired a PS/2 mouse to free up my COM1 port. I used the HBDL.exe program that came with the board. After several unsuccessfully attempts to program the board, for some (...) (26 years ago, 15-Dec-98, to lugnet.robotics.handyboard)
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| | 68hc11a1 x 68hc11a8 and IC hardware
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Hi people! I'd like to know two things: 1) Can I use the 68hc11a8 instead of the 68hc11a1 in the Handyboard, without recompiling Interactive C? 2) What's the minimum hardware to run Interactive C? I just want to blink a led to see if the hb is (...) (26 years ago, 15-Dec-98, to lugnet.robotics.handyboard)
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| | HB Reset not executing main().
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I built two more Handyboards and I've noticed something odd. When I download a program with a main() function, and reset the board, main() does not get executed. I thought it was supposed to. I'm using IC v3.1 (for the Mac) and Handyboard version (...) (26 years ago, 15-Dec-98, to lugnet.robotics.handyboard)
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| | Re: Beginner's Help
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Make sure that your com port 2 is actually wired to the motherboard I've heard a lot of stories with com ports not working because they forgot to connect the ribbon cable. Check that first. Try booting ito dos and use the DL.exe instead of the HBDL (...) (26 years ago, 15-Dec-98, to lugnet.robotics.handyboard)
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| | Re: some kind of dividing circuit?!?!?!?!
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In reference to your question about the motor with encoders. I know this isn't a software solution, but what if you used an external hardware (chip) counter that reset after 2^(number of bits) clicks. Then send resets as your steps to the (...) (26 years ago, 15-Dec-98, to lugnet.robotics.handyboard)
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| | Re: Mapping
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(...) Watch the critical angle for the sonar too. If the sonar doesn't hit almost straight on, some of the energy will be reflected off at an angle, and may provide false longer distances. Smooth surfaces will have a lower critical angle then coarse (...) (26 years ago, 15-Dec-98, to lugnet.robotics.handyboard)
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| | Re: Mapping
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I've just started experimenting with mapping and these are my thoughts on it. Drop the robot anywhere in its environment. The robot has a sonar hooked to a servo so the sensor can be scanned horizontally. As the sensor sweeps from left to right, (...) (26 years ago, 15-Dec-98, to lugnet.robotics.handyboard)
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| | Re: SRAM and orLCD problem
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eric, i don't have a definitive answer, but here are two things: 1. You *NEED* the reset chip, whether it's a DS1233 or the MC34064HC, I don't care, but you must have a device that asserts reset (pulls the line low) when the system voltage falls (...) (26 years ago, 15-Dec-98, to lugnet.robotics.handyboard)
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| | Mapping
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Hi, Could anyone tell me how a robot can do mapping in a room. Thank you (26 years ago, 15-Dec-98, to lugnet.robotics.handyboard)
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| | Beginner's Help
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Has anyone had this problem: I am running win 98 on P200 MMX, and com1 is used by a serial mouse. I just bought the board, serial expansion board, and cables from Gleason Research. Comm2 is usually used by my internal modem, but I removed it and (...) (26 years ago, 15-Dec-98, to lugnet.robotics.handyboard)
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| | SRAM and orLCD problem
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Hi, I'm tring to assembly a Handy board and I get to section 6. "The beeper and LCD circuit". In section 4 I've got the pcode_hb downloaded in the 68HC11A1 and the error when DL.EXE comes in the second phase. (I use the DOS version from Randy (...) (26 years ago, 15-Dec-98, to lugnet.robotics.handyboard)
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| | Handyboard communication
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Just a simple question- Does the HB operate under Half- or Full Duplex Communication? If it depends on the program, what is the nature of IC (half/ full duplex) Thanks, Dave (26 years ago, 15-Dec-98, to lugnet.robotics.handyboard)
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| | Fw: Please help! HD jammed !!!
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(...) to (...) Besides, (...) on (...) with (...) (26 years ago, 15-Dec-98, to lugnet.robotics.handyboard)
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| | Small Contribution...
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Howdy Folks, I just finish writing the first version of ICD; a small Expect server, that listens for TCP/IP requests on port 2010, and forwards them to IC (Interactive C). Use it to make web, email, and even 2 way paging interfaces to the Handy (...) (26 years ago, 15-Dec-98, to lugnet.robotics.handyboard)
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| | recompile/assemble pcode.asm for HB
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Hi HB-Users! I tried to compile/assemble the pcode for the hb to get a running version for another display than 16x2. I downloaded the environment for pc's (containing gcc and as11 and pcode - but not for hb). Than a draw the pcode.asm for hb. When (...) (26 years ago, 14-Dec-98, to lugnet.robotics.handyboard)
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| | RE: Source of 68HC11 in UK?
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Hi peter, you can get the 68hc11 from r.s or farnell here is the farnell catalog number and price. (URL) MC68HC11A1FN Price. £7.50 cat num. 295-619 cheers Russ... -----Original Message----- From: peter@xkeys.demon.co.uk (...) (26 years ago, 14-Dec-98, to lugnet.robotics.handyboard)
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| | Problems getting a L298H based motor controller to work...
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Hi, On Friday I received a L298H based motor controller kit from JCM Electronics. The assembly was fairly painless, however I can't seem to get it to work. I get 5 volts out of the logic battery output, so the regulator is working. I double checked (...) (26 years ago, 14-Dec-98, to lugnet.robotics.handyboard)
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| | a/d range and instrumentation
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Hi! Could someone please tell me what is the Handyboard a/d range (60 mV?) and how about it's accuracy? Is someone interested to use or has used the HandyBoard in instrumentation? I plan to make a temperature indicator / pid / fuzzy controller with (...) (26 years ago, 13-Dec-98, to lugnet.robotics.handyboard)
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| | Re: HandyBoard Build it yourself
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Hi folks! Here is my current shop list, as soon as I have my Handyboard here I'll try to make a complete shop list. 1) First option: buy the unassembled kit from Pattrick Hui's Robot Store in Hong Kong. Order by mail huip@hkstar.com. The standard (...) (26 years ago, 13-Dec-98, to lugnet.robotics.handyboard)
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| | some kind of dividing circuit?!?!?!?!
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hi, I am thinking of using motors with encoders built in them on my rugwarrior board, but the problem is that the motor returns 500 clicks per revolution. and since the counter can only hold about 32,000 the variable fills up and overflows very (...) (26 years ago, 13-Dec-98, to lugnet.robotics.handyboard)
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| | Re: Position Control Question ?
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Thanks for your reply. To answer your question about position control, let me describe my application. I have an Handyboard, stepper motor, and a linear system (ball-screw), and I would like to control the position of the part mounted on the nut of (...) (26 years ago, 13-Dec-98, to lugnet.robotics.handyboard)
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| | Miniboard in space.
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Hi, I realize that this is actually not a miniboard list, but since the miniboard is actually the handyboards little brother, I figured maybe this would be of interest. About a year ago I was asked to help a local high school integrate their (...) (26 years ago, 13-Dec-98, to lugnet.robotics.handyboard)
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| | Please help! HD jammed !!!
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Hi FThompson, Fred and other, I encountered some problem in the downloading. I was successfully able to download the p_code into the HD. However, When the instruction proned me to reset the board, it always appears on the LCD without any lettering (...) (26 years ago, 13-Dec-98, to lugnet.robotics.handyboard)
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| | IC question
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Dear All, I have a question on the operation of the Handy Board motor outputs which i do not understand. As deduced from the schematic diagram, I believe that the HC374 chip clock input is connected to a Y6 terminal. This Y6 terminal is one of the (...) (26 years ago, 13-Dec-98, to lugnet.robotics.handyboard)
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| | Position Control Question ?
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Hi Everybody I am new in this mailing list. Has anyone successfully implemented a position control using the handyboard with either a stepper motor or dc servo motor. Baraki (26 years ago, 13-Dec-98, to lugnet.robotics.handyboard)
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