 | | Re: Handboard exp.
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Hi, I believe an earlier post indicated that, since the analog inputs on the expansion board are multiplexed to the analog input 0 on the HB, if you cut the trace on analog port 0, the expansion board analog ports will all be "pull-up (...) (24 years ago, 20-Jul-00, to lugnet.robotics.handyboard)
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| | GP2D12 on expansion board
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Hi all, I am using three GP2D12 on the expansion board. When I connect them (after removing the analogue port 1 resistor and put the GP2D12 on port 24-26) I experience some weird problem. It seems the there is a short-circuit somewhere. I notice (...) (24 years ago, 19-Jul-00, to lugnet.robotics.handyboard)
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| | short-circuit?
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Hi, This past few days, I notice my board uses up the battery very quickly (may be because I use servos). Then I notice that the voltage regulator at U13 heats up very quickly. I was wondering if I short-circuit somewhere. I didn't build the board, (...) (24 years ago, 19-Jul-00, to lugnet.robotics.handyboard)
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| | Re: What is a bobbin(sp)?
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(...) is it a cylinder (about the size of 2x2) with thin wall sides? (what a lego description!) then, it is an accessory for a sewing machine that holds the thread for the backstitch. older ones are metal; newer ones are plastic. later ~ craig~ (24 years ago, 19-Jul-00, to lugnet.robotics.handyboard)
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| | Re: What is a bobbin(sp)?
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Isn't a bobbin part of a sewing machine? I distinctly remember it being the thing underneath the needle that you needed to load with thread to make the whole thing work. Aha, a look at websters gives me the following definition: 5. (Elec.) A (...) (24 years ago, 19-Jul-00, to lugnet.robotics.handyboard)
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| | RP: GP2D12 on port 28, 29, 30
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Hi. Sorry if this is a repost. I don't think I was able to post this message last time. I am thinking about putting three GP2D12 sensors on port 28, 29, 30 (because I am not thinking about using Lego Sensor, and I really like other analogue ports (...) (24 years ago, 18-Jul-00, to lugnet.robotics.handyboard)
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| | RP: What is a bobbin(sp)?
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Hi. Sorry if this is a repost. I don't think I was able to post this message last time. This is a silly question: What is a bobbin(sp)? I tried to find its function on-line or in textbooks, but I couldn't find much. A friend gave me a box filled (...) (24 years ago, 18-Jul-00, to lugnet.robotics.handyboard)
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| | RP: GP2D12 on port 28, 29, 30
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Hi. Sorry if this is a repost. I don't think I was able to post this message last time. I am thinking about putting three GP2D12 sensors on port 28, 29, 30 (because I am not thinking about using Lego Sensor, and I really like other analogue ports (...) (24 years ago, 18-Jul-00, to lugnet.robotics.handyboard)
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| | 470uF Capacitor (C3)
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Just a quick question, how important to the poser supply of the HB is the 470uF axial electrolytic capacitor ?. I made the mistake of getting a 64V version thinking that this would be ok and as it is installed under the LCD the rather large cap that (...) (24 years ago, 18-Jul-00, to lugnet.robotics.handyboard)
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| | GP2D12 on port 28, 29, 30
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Hi, I am thinking about putting three GP2D12 sensors on port 28, 29, 30 (because I am not thinking about using Lego Sensor, and I really like other analogue ports with the 1K pull-up resistors). Has anyone done it? Or is it a bad idea to uses these (...) (24 years ago, 17-Jul-00, to lugnet.robotics.handyboard)
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| | Cabling concerns
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I am putting together a somewhat modular robot: The main controller and batteries are to be connected to peripheral motors (and controller) via cable-- around 5 feet distance. I'm looking for a connection cable that has enough pins for my data and (...) (24 years ago, 17-Jul-00, to lugnet.robotics.handyboard)
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| | What is a bobbin(sp)?
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This is a silly question: What is a bobbin(sp)? I tried to find its function on-line or in textbooks, but I couldn't find much. A friend gave me a box filled with robot parts, including these things call bobbin. What are they? -- Ray (24 years ago, 17-Jul-00, to lugnet.robotics.handyboard)
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| | PWM decoding
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Has any body used the HB to decode the PWM signals from a radio control receiver ?. I'm not sure if it can be done (I haven't looked that deeply into it yet) but I am construction a six legged walker with the twelve servos being controlled by a (...) (24 years ago, 17-Jul-00, to lugnet.robotics.handyboard)
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| | IR Sensor Hack
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I wrote the following email to Mekatronix regarding the sensor hack to convert Sharp GP1U58X or Y sensors to IR range finder sensors. The pdf documentation currently on their website just shows how to solder onto a trace within the sensor to give an (...) (24 years ago, 17-Jul-00, to lugnet.robotics.handyboard)
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| | Handboard exp.
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Hi I have a small problem, I want to connect three sharp gp2d12s to the expansion board and I know I cant cut traces 0,1 and the gp2d12s need the pullups removed to operate correctly. How do I use them on the expansion board? Any help would be (...) (24 years ago, 17-Jul-00, to lugnet.robotics.handyboard)
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| | Re: HB power drain
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My board draws .068 amps when idle. MLB (...) (24 years ago, 15-Jul-00, to lugnet.robotics.handyboard)
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| | Re: IR (formally 6.8nF cap)
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yes, a variance of 1 kHz in the carrier frequency makes no difference at all to these sensors. f. In your message you said: (...) (24 years ago, 14-Jul-00, to lugnet.robotics.handyboard)
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| | HB power drain
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Does anybody know what sort of power drain the HB has when it is not driving any outputs (servos or motors) ?. The reason I ask is that I am thinking of having a rechargable 9v PP3 battery connected as a reserve battery so that when the main battery (...) (24 years ago, 14-Jul-00, to lugnet.robotics.handyboard)
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| | Re: IR (formally 6.8nF cap)
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So as the 39KHz value would be ok for either the IS1U60 (38KHz) or the hacked sensors (40KHz), will my idea for the hacked IR sensor distance measurement using the IR output circuitry to drive multiple LEDs also be valid ?. Thanks for the help. John (...) (24 years ago, 14-Jul-00, to lugnet.robotics.handyboard)
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| | Pins to connect for stacking h bridges
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Hello all, I have built a robot before, and sold it, and had stacked H-Bridge chips. I had also fed in an alternate battery source. I want to do this again and can't remember which pin to use for pos battery terminal (pin # please). I am not an (...) (24 years ago, 13-Jul-00, to lugnet.robotics.handyboard)
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| | Re: IR (formally 6.8nF cap)
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there's not really a big diff in the performance of the ir sensors given 38 or 40 khz. so either is fine, +/- a few khz just doesn't really matter, you have to detune 10 khz or so for it to matter. there is an issue whereby there are two different (...) (24 years ago, 13-Jul-00, to lugnet.robotics.handyboard)
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| | IR (formally 6.8nF cap)
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I have asked for confirmation as to which frequency (38 or 40 KHz) is correct. As my current components should give me a frequency of 39KHz (1/3.883KOhm*6.6nF) I should be able to use either with out to much problem. I am thinking of using the (...) (24 years ago, 13-Jul-00, to lugnet.robotics.handyboard)
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| | IR Transmission/Reception
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Can any body confirm what frequency the IR transmission/reception system on the HB should be working at ?. The documentation (HB Manual) states that the HB has a 38KHz system but the Assembly Manual states for testing the transmission circuit you (...) (24 years ago, 13-Jul-00, to lugnet.robotics.handyboard)
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| | Re: "3D"
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[Steve Stevens] spake unto the ether: (...) I believe that IC variables must start with a letter a-z, A-Z, $ or _. Starting with a numeral 0-9 is illegal, yes? *Rich* (24 years ago, 12-Jul-00, to lugnet.robotics.handyboard)
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| | "3D"
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I see the variable "3D" used in several pieces of code. What is it and why can't I get my IC to recognize it? I keep getting a "parse error close to D." message when I try to use it. (24 years ago, 12-Jul-00, to lugnet.robotics.handyboard)
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| | Re: Robot positioning
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William - For my group project, we bought sonar transducers and built circuits for them. Our original recieving circuit is digital rather than analog as we were only going to have one. The circuits we used are on our group's website on our (...) (24 years ago, 12-Jul-00, to lugnet.robotics.handyboard)
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| | Re: 6.8nF Capacitor
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I don't suppose you know what the formula is for calculating the value of the frequency ?. 1/(R4*C6) possibly ?. This equation gives 38396Hz (38.4KHz) which means that my 6.6nF caps give 39560Hz (39.6KHz) which is closer to 40KHz than the 6.8nF (...) (24 years ago, 12-Jul-00, to lugnet.robotics.handyboard)
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| | Re: Robot positioning
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Hi Kate, I just want to know how/where to get a sonar transmitter/reciever pair with different frequencies for robot positioning. Can sonar module from Polaroid do that? Thanks, William (...) on (...) (24 years ago, 12-Jul-00, to lugnet.robotics.handyboard)
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| | Re: Robot positioning
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If you want to return to "base," all you need is a beacon of some sort. For example, you could use CdS cells (or anything that finds EM in the visible light/low IR range) and a lightbulb (or series of lightbulbs, like a strand of Christms tree (...) (24 years ago, 11-Jul-00, to lugnet.robotics.handyboard)
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| | Melissa Virus
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I have found the source and fortunately it is not from a HB site. It was from the Washington and Lee University EE school. (24 years ago, 11-Jul-00, to lugnet.robotics.handyboard)
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| | Robot positioning
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Hello all, I am currently building a H board/exp board based robot that has (will have) the following sensors: Diffrential drive wheel encoders, hamamatsu sensors combined with the software from the H board site for motor control and distance counts (...) (24 years ago, 11-Jul-00, to lugnet.robotics.handyboard)
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| | Follow-up to Virus
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It is amazing what can be recovered off a disk, with the right tools. This is the data on the virus files. The document, final1r....doc, within the zip file 478eti.zip is the culprit. "This file was quarantined.f M The file (...) (24 years ago, 11-Jul-00, to lugnet.robotics.handyboard)
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| | File Contains Virus
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There is a file located on one of the HB sites that contains the Melissa W97 virus. It begins with 478... I am sorry that I can not give you more info as the virus scanning software removed the file, but if you maintain a server with HB files on it, (...) (24 years ago, 11-Jul-00, to lugnet.robotics.handyboard)
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| | Re: four polariod sonars
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Hi, I read the design a while back... Don't you just control the multiplexor circuit on the handyboard and then call the sonar routines? All sonar use the same routine, aren't they? -- Ray JULIAN REYES <handyboard@media.mit.edu> wrote in message (...) (24 years ago, 11-Jul-00, to lugnet.robotics.handyboard)
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| | Re: Handyboard startup problems
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Yes, I encounter something similar. Do you use servo on your board? I also have some trouble with the motor ports. I am not sure what causes it. I also have trouble with the motor ports. When I run the motor at 50% power (back or forward), both red (...) (24 years ago, 10-Jul-00, to lugnet.robotics.handyboard)
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| | H2000 optical position sensor
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Hi, I am planning to build a position detector with a H2000 chip. The chip is used in several optical mice, for example the H2000/0006 can be found inside the Microsoft IntelliEye mouse. I sill have difficulties in finding the manufacturer and the (...) (24 years ago, 10-Jul-00, to lugnet.robotics.handyboard)
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| | Re: Handboard supplier?
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Try Patrick Hui at Robot Store ( (URL) or for info emailto:info@RobotStoreHK.com ) he sells assembled boards at reasonable prices. (...) (24 years ago, 10-Jul-00, to lugnet.robotics.handyboard)
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| | serial communications HB - PC
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Hi! I need to know how implement a serial and asyncronous communication (send and recieve data between my PC and my HB) through the computer conector (not through the spi!), Does somebody know how can i do it or what are the hb serial commands or (...) (24 years ago, 9-Jul-00, to lugnet.robotics.handyboard)
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| | four polariod sonars
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Hi everybody! I´m working in mi mobile robot and for the navigation i want to connect 4 polaroid sonars to my HB, has anybody developed any design? I found in the HB site a multiplexor circuit for connect 4 sonar by adam cox, but i can´t find more (...) (24 years ago, 9-Jul-00, to lugnet.robotics.handyboard)
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| | Re: Memory erased
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Jose -- Yes, I think that's normal. -- Will (...) (24 years ago, 9-Jul-00, to lugnet.robotics.handyboard)
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