 | | Re: IR Demodulator Range Finder Hack
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(...) (2 URLs) the referring page. I have used this "hack", and found it to be quite extensible and flexible. We used "high output" IR LEDs, from Radio Shack (I don't have the part number, but, if you go in there, its the light light blue ones) that (...) (27 years ago, 18-Nov-97, to lugnet.robotics.handyboard)
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| | Re: Applications?
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(...) Yes. (...) Yes, if the motors draw less than 1Amp of current when stalled. (...) Yes. (...) You can drive bipolar stepper motors using the on board h-bridges. (...) Yes. The typical way to do this would be to attach your directional detector (...) (27 years ago, 17-Nov-97, to lugnet.robotics.handyboard)
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| | hexapodial walkers & other stuff
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hi. I was looking thru the new Robot Store catalog (www.mondo.com) and saw that they were selling hexapod walkers. I was wondering has anyone here built a hexapod? Mondotronix had it so that there were 2 horizontal crossbars per 1 vertical leg. (...) (27 years ago, 17-Nov-97, to lugnet.robotics.handyboard)
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| | subscribe
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subscribe shahian@csulb.edu (27 years ago, 17-Nov-97, to lugnet.robotics.handyboard)
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| | Applications?
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Hello to all Robo-maniacs!!! I was just wanted to make sure some thoughts about the Handyboard. 1 Can you connect it with a PC and after you make a programm in C, load it in the handyboard (and after disconnection can you apply the program on your (...) (27 years ago, 17-Nov-97, to lugnet.robotics.handyboard)
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| | array variables
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Hello all, is it possible to create an array variable in the .icb file, if so how do you do it? -tanis (27 years ago, 17-Nov-97, to lugnet.robotics.handyboard)
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| | Re: 293s, Cable
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In your message you said: (...) this isn't the problem. (...) please do the following, and specify the point of failure. 1. Open a terminal emulator program on your CPU (e.g., ProComm for DOS, HyperTerminal for Windows 95, ZTerm for Mac). Select the (...) (27 years ago, 17-Nov-97, to lugnet.robotics.handyboard)
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| | Re: IR Demodulator Range Finder Hack
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(...) I would be interested to hear about this too please. We are running a Group Design Exercise (our own version of a Lego robot competition). Designing the staff entry (to check the idea was feasible in the short time alloctated to the exercise) (...) (27 years ago, 17-Nov-97, to lugnet.robotics.handyboard)
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| | Platinen zu verkaufen
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Soory, this offer is valid for Germany only. So it's written in german. Hallo, ich hab hier noch eine Platine fuers Handy-Board uebrig. Eigentlich sinds 2. Also das eigentliche Board + Schnittstelle. Wer also noch Bedarf an so etwas hat, sollte sich (...) (27 years ago, 17-Nov-97, to lugnet.robotics.handyboard)
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| | 293s, Cable
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We're trying to build a handyboard, and we attempted to dl the .s19, but it doesn't work. It gives the connecting at 1200 baud.... message but nothing happens after this. Two issues that I believe may be causing this are: 1) we don't have the 293 (...) (27 years ago, 17-Nov-97, to lugnet.robotics.handyboard)
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| | IR Range finder
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I am posting this for in case any body is interested as I know that I will be trying to make use of it. I apologise in advance to anybody who already knows how to do this, or does not intend to use such a range finder, but I imagine there are a lot (...) (27 years ago, 17-Nov-97, to lugnet.robotics.handyboard)
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| | Re: Ooops.
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It's unlikely you killed the MCU, there are 1k resistors in series with the RxD and TxD lines. Go to the assembly manual, and run through the series of tests that verify proper operation of the Interface/Charger Board. (URL) your message you said: (...) (27 years ago, 17-Nov-97, to lugnet.robotics.handyboard)
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| | External motor power
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I want to use an external battery for motor power. I see the power expansion header apparantly for this purpose but it appears that I have to cut a trace to disconnect the HB battery from MOTORPWR. Is true? Is there anything else that I may have (...) (27 years ago, 17-Nov-97, to lugnet.robotics.handyboard)
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| | IR Demodulator Range Finder Hack
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A few months ago I found information on how to modify the Sharp IR Demodulator to produce an analogue voltage relating to the strength of IR received. The problem is that I have lost the information and can't remember where I saw it. Has anybody (...) (27 years ago, 17-Nov-97, to lugnet.robotics.handyboard)
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| | Ooops.
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Help! I accidently plugged a network rj11 cable between my HB and the serial interface board. It seems that I released the smoke genie from R 11. I have replaced the resistor and the MAX 232 but I'm not getting the board to sync. Is there anything (...) (27 years ago, 16-Nov-97, to lugnet.robotics.handyboard)
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| | Shaft Encoders
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While looking through the code 'pcode.asm' I came accross reference to various encoder routines that enable Y0 and get RSE code from the data bus. How can I call these within a C Programme ? I've not seen this feature documented anywhere (or maybe (...) (27 years ago, 15-Nov-97, to lugnet.robotics.handyboard)
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| | Motorola Reference Guides
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I just got the set of Motorola HC11 guide books and reference manuals. I can highly recommend them - I am now able to understand the processor better, and how to take advantage of its many facilities. However when requesting them from the web site I (...) (27 years ago, 15-Nov-97, to lugnet.robotics.handyboard)
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| | Re: IR devices
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The IR led I assume would be the transparent one and the detector would be the black one? There are 2 leads on the transmitter and 3 on the detector, how and where should I connect it to the HB? Any diagrams available? If this works, I have about 10 (...) (27 years ago, 14-Nov-97, to lugnet.robotics.handyboard)
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| | AD: Wirz Electronics
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Hello Everyone, We have a number of new Microcontroller products that we think you may be interested in: ---...--- Microchip PIC Products: "Programming and Customizing the PIC Microcontroller" book by Myke Predko (URL) Up The Pace" book by David (...) (27 years ago, 14-Nov-97, to lugnet.robotics.handyboard)
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| | Re: bit_set and Poke
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bit_set in english is "for the byte at this adress, make these bits high". The first argument is the address (i.e. 0x0e). The second argument is the mask which indicates which bits to make high. bit_clear in english is "for the byte at this address, (...) (27 years ago, 12-Nov-97, to lugnet.robotics.handyboard)
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| | Re: Microphone and Heat Sensors
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(...) Interesting sounding project Melissa. The trick is to distinguish the doorbell from other ambient sounds heard picked up by the microphone. One approach might be to use the LM567 PLL Frequency Detector. Its a relatively simple little 8 pin IC (...) (27 years ago, 12-Nov-97, to lugnet.robotics.handyboard)
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| | microphones and heat sensors
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I am a highschool intern trying to build a lego robot which models a housepet using the handy board. My task involves the robot sensing a "doorbell" and moving towards the sound. I will need to use microphones to accomplish this and I am wondering (...) (27 years ago, 12-Nov-97, to lugnet.robotics.handyboard)
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| | bit_set and Poke
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Could someone xplain the relationship that bit_set, bit_clear and poke / poke word have ? Specificallt in the bit_set code used for the motor control, 0x0e is placed before the bit values - why ? I geuess this is used to select the motor port, but (...) (27 years ago, 12-Nov-97, to lugnet.robotics.handyboard)
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| | UK SUPPLIERS OF PCBSDate: Tue, 11 Nov 1997 21:40:00 GMT
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Hi John, JJ> I am just writing to see if you still have the PCBs available. If Yeah, I do - the guy I originally emailed hasn't got back to me yet. Neither has anyone else actually! I'm just in the process of enquiring about ordering a Fingerboard (...) (27 years ago, 12-Nov-97, to lugnet.robotics.handyboard)
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| | Re: L239
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Chuck is correct. There are some other subtle differences between the D and E versions but the basic function and capability are the same. John Bachman (...) (27 years ago, 11-Nov-97, to lugnet.robotics.handyboard)
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| | RE: Burning hot motor driver chips.
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(...) I wouldn't say it's partially correct, I would just say that the drive motors used in RC (radio controlled) cars are picked out to make the car go fast, and hence require a lot of current to produce this speed. They are readily available at (...) (27 years ago, 11-Nov-97, to lugnet.robotics.handyboard)
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| | Re: Burning hot motor driver chips.
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So I guess RC servos/motors are regular servo motors and DC motors that have been stripped from RC cars? Are they any diferent from regular servo/DC motors? If not, then why lable them as "RC"? Since the RF component isn't there anymore... :-/ (...) (27 years ago, 11-Nov-97, to lugnet.robotics.handyboard)
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| | Re: Burning hot motor driver chips.
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(...) Well, that's partially correct. The RC cars usually have a speed control/ steering module that incorporates the RF receiver. This module supplies PWM signals to the drive motor and also controls a steering servomotor. Marco A.A. de Oliveira (...) (27 years ago, 11-Nov-97, to lugnet.robotics.handyboard)
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| | Re: Burning hot motor driver chips.
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So am I correct to assume that an RC motor had a built in RF reciever? ---...--- ericson mar Master of Engineering Candidate Project: Mobile Robotics mar@cooper.edu (212)353-4356 Department of Mechanical Engineering The Cooper Union for the (...) (27 years ago, 11-Nov-97, to lugnet.robotics.handyboard)
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| | Re: Burning hot motor driver chips.
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(...) I believe that's correct: Radio Controlled devices, RC devices. Marco A.A. de Oliveira assfalk@eece.unm.edu ---...--- Autonom. Robotics (SMART) Project UNM/NASA ACE Center ---...--- (URL) ---...--- (...) (27 years ago, 11-Nov-97, to lugnet.robotics.handyboard)
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| | Re: Burning hot motor driver chips.
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What does "RC" stand for anyway? I don't think it's Radio Control...is it? ---...--- ericson mar Master of Engineering Candidate Project: Mobile Robotics mar@cooper.edu (212)353-4356 Department of Mechanical Engineering The Cooper Union for the (...) (27 years ago, 10-Nov-97, to lugnet.robotics.handyboard)
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| | Re: L239
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Jonathan: I have _dozens_ of L293's as well as L298's with motor controller circuit boards i would be pleased to sell to you if you like. L293's for $5.00 canadian. If you would like to see the motor controller, check my website at (URL) under the (...) (27 years ago, 10-Nov-97, to lugnet.robotics.handyboard)
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| | Re: L239
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Hi, I got L293E (the 20 pin DIP package) from Mouser at $2.53 each. 800-346-6873. John Bachman (...) (27 years ago, 10-Nov-97, to lugnet.robotics.handyboard)
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| | Expansion Board
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It would be nice to see a set of raw, addressed digital OUTPUTS (as well as) analog OUTPUTS on the board. Maybe they are already on the handy board itself, however, they are not addressed on the data bus. The IC code libraries needed for this would (...) (27 years ago, 10-Nov-97, to lugnet.robotics.handyboard)
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| | L239
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Does anyone know of a good source for the L293D or th TI SN754410? Future Electronics has them, but they want roughly $9.00 per chip. I am just looking for 4, but I don't want to be charged an arm and a leg to get them. Thanks ___...___ ___...___ (...) (27 years ago, 10-Nov-97, to lugnet.robotics.handyboard)
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| | Re: Burning hot motor driver chips.
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Anthony, As you've no doubt heard, RC motors take much more current than the Handyboard can supply. To control RC motors your only choice is to create a separate H-bridge to drive the motors. You can do this fairly inexpensively with power (...) (27 years ago, 10-Nov-97, to lugnet.robotics.handyboard)
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| | Re: IR devices
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Hi Jeremy! I used the shaft encoder out of a track ball for my robotic project(same thing but a bit bigger). You do not need the IC out of the mouse just take the shaft encoder and use it with a IR led and detector pair. If you are going to use the (...) (27 years ago, 10-Nov-97, to lugnet.robotics.handyboard)
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| | Re: Burning hot motor driver chips.
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Hello, RC car motors pull a lot of current, from 2A to 8A. The L293D chip goes up to 1A peak (for some miliseconds) before it shuts down. I suggest bypassing the L293D chips and using something like the LMD18200. (URL) Good luck, Marco A.A. de (...) (27 years ago, 10-Nov-97, to lugnet.robotics.handyboard)
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| | Project Questions
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Three of us are undertaking a project using the Handyboard as the control system for a class at MIT. Our project, an autonomous blimp, has an unusual set of constraints, but we're hoping that your collective experience might be able to help us (...) (27 years ago, 9-Nov-97, to lugnet.robotics.handyboard)
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| | Re: Burning hot motor driver chips.
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(...) sounds reasonable.. which "car" BTW? Some may be using that very same platform and may have some timely advice for you. (...) sounds like overload/overheating cutoff to me. (...) This is from the Handy Board FAQ : <---snip---> It is possible (...) (27 years ago, 9-Nov-97, to lugnet.robotics.handyboard)
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