 | | Re: GP2D02 conversion
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(...) Actually, the GP2DO2's output is not at all linear. Plotting the output against the actual distance will show an exponential curve. Each one is slightly different so what I do is to make up a little table in Excel like: 0,0 70,10 116,15 142,20 (...) (25 years ago, 14-Jan-00, to lugnet.robotics.handyboard)
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| | Using a 293B/293D combination
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The HB FAQ mentions using the LM293B and LM293D chips in parallel (e.g., one L293D and one L293B) to gain increased current-carrying capability. My question is, if I do this am I losing the function of the spike-protecting diodes on the motor (...) (25 years ago, 14-Jan-00, to lugnet.robotics.handyboard)
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| | Fw: Whats Patrik Hui's Web adress?
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Hello Alex, My web address is: (URL) Hui Robot Store (HK) patrick@robotstorehk.com (...) (25 years ago, 14-Jan-00, to lugnet.robotics.handyboard)
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| | Re: GP2D02 conversion
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(...) You mean like value = 10 + ((70 * b) / 256) ? --Ben (25 years ago, 14-Jan-00, to lugnet.robotics.handyboard)
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| | Whats Patrik Hui's Web adress?
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Hi What is Patrik Hui web address? thanx -roboman robotman5@hotmail.com (25 years ago, 13-Jan-00, to lugnet.robotics.handyboard)
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| | GP2D02 conversion
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Does anyone how I could create a lookup table or an algorithm to convert the output of the Sharp GP2D02 (0 to 255 = byte) to values between 10 and 80 cm, which is the reading capability of the IR? Thank you, J.M. Mongeau (25 years ago, 13-Jan-00, to lugnet.robotics.handyboard)
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| | Re: IR Question
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All of the IR sensors I've seen use a pulsed IR emitter so that the detector can distinguish between the emitted IR and ambient (e.g. sunlight). Some sensors simply measure the intensity of reflected IR, but this method doesn't work reliably unless (...) (25 years ago, 13-Jan-00, to lugnet.robotics.handyboard)
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| | I have some simple questions
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I am a new user of handy board. I use handy board based on Mac. After I download Handy_Board_v1.2.icd, do I need to download any other thing to handy board? Now the basic function like fd(3), ao() works, but the expend function like sonar does not (...) (25 years ago, 13-Jan-00, to lugnet.robotics.handyboard)
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| | Sorry, I just try
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I am a new user of robot, I just try it! (25 years ago, 13-Jan-00, to lugnet.robotics.handyboard)
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| | Robotics Show on TLC
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Anyone interested, the show is: Extreme Machines: Incredible Robots A look at robots and the long-term benefits and possible consequences of their capabilities. Rating: TV-G Category: Other, Documentary Originating Country: United States Date Time (...) (25 years ago, 12-Jan-00, to lugnet.robotics.handyboard)
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| | Re: Sensor questions
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(...) The Electronic Surplus Dealer Goldmine, (URL) been selling some weather balloon electronics innards for a few years. On this board there are some relevant sensors: a thermistor, some sort of barometric chip and a humidity "device". The (...) (25 years ago, 13-Jan-00, to lugnet.robotics.handyboard)
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| | IR Question
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Greetings, I've heard mention of the various Sharp IR sensors which can give different distance readings for different zones. Part of my final year project is to design and investigate various sensors, but I really have to generate the stuff myself (...) (25 years ago, 13-Jan-00, to lugnet.robotics.handyboard)
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| | Re: SPI Port
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I interfaced my Vector2X to the handyboard without using the SPI port and without any machine language. I set the compass to be in slave mode and used three digital outputs on the expansion board to control the RESET, SCLK, and SS lines. I used (...) (25 years ago, 13-Jan-00, to lugnet.robotics.handyboard)
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| | Re: Sensor questions
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You wrote: I then tried the LM34. There is no calibration pin and it uses farenheit. 1F=10Mv. For some reason, the output from this device varies very little with changes in the room temperature. Now the present room temperature is 58F, during the (...) (25 years ago, 12-Jan-00, to lugnet.robotics.handyboard)
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| | Re: Sensor questions
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(...) Sounds like fun! Go check out the EFI332 (hope I got that right) project. That's a project to build a 68332 board to control a larger engine. They'll probably have pointers to the different types of sensors that can be used with it, some of (...) (25 years ago, 12-Jan-00, to lugnet.robotics.handyboard)
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| | Re: Sensor questions
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(...) SNIP (...) Newark electronics used to sell a humidity sensor based on this principle for about $ 12. It should still be available. I believe it was made by Phillips. Basically the variations in capacitor value is used to vary the frequency of (...) (25 years ago, 12-Jan-00, to lugnet.robotics.handyboard)
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| | Sensor questions
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I have several sensor questions. I would like to use my miniboard as an engine management system. At the present time, I have a small 2 cycle engine from a weed wacker that I would like to control. I would like to have the miniboard gather some (...) (25 years ago, 12-Jan-00, to lugnet.robotics.handyboard)
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| | SPI Port
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Hello - I have two sensors that require the SPI port: the Sharp GP2D02 IR sensor, and the Precision Navigation Vector Compass. I'm hoping that someone can tell me how to use both of these sensors at the same time, on the same port or by using some (...) (25 years ago, 12-Jan-00, to lugnet.robotics.handyboard)
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| | Re: "Traces"?
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(...) That's exactly what I meant! I took a look in my dictionary ... "conductor path" may be the technical term. (25 years ago, 12-Jan-00, to lugnet.robotics.handyboard)
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| | PCB Designs
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HI Any of you guys out there in robo land have any good PCB designs for high powered motor driver, IRPD's or a nice Handy Boardish thing that you dont know what to call. Thanx -roboman PS Got a PCB etcher system for XMAS and want some PCB designs (...) (25 years ago, 12-Jan-00, to lugnet.robotics.handyboard)
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| | Re: "Traces"?
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(...) 'Trace', and 'track', are common parlance, for the wiring built onto the printed circuit board inside a unit. So the post is saying that you have to actually cut the copper 'tracks' inside the unit itself. Best Wishes (25 years ago, 11-Jan-00, to lugnet.robotics.handyboard)
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| | "Traces"?
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(...) I've seen "trace" used a couple times as regards the Handyboard, concerning the leads from/to the inputs, I think??? What does it mean, what are they? Thx :) - Scarius (URL) (25 years ago, 11-Jan-00, to lugnet.robotics.handyboard)
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| | Re: GP2D12 Pinouts
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(...) Just visit: (URL) are some modifications to the handyboard required, because the sensor does not work with the pull-up resistors on the handyboard. You have to cut some traces on the handyboard. A detailed description and a picture of the (...) (25 years ago, 11-Jan-00, to lugnet.robotics.handyboard)
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| | GP2D12
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I just managed to connect a Sharp GP2D12 to my Handyboard. The advantage compared to the GP2D02-device is the analog output which does not consume processing power for clocking the sensor. Further information can be found at: (URL) (25 years ago, 11-Jan-00, to lugnet.robotics.handyboard)
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| | RE: More servo stuff
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I had the same problem. The servo would run fine if the program was not doing anything else. But if I was updating the pwm to the motor ports then the servo would jitter. I figured it was because the extra overhead was screwing up the timing on the (...) (25 years ago, 11-Jan-00, to lugnet.robotics.handyboard)
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| | Re: More servo stuff
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(...) I did this but it didn't help. *sigh* Thanks for the tip! (25 years ago, 10-Jan-00, to lugnet.robotics.handyboard)
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| | Re: GP2D12 & Expansion Board
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You can cut the trace going to the pullup resistor corresponding to analog(0) on the main board and then all of the expansion board analog inputs will be floating. Analog(0) is multiplexed to provide all of the analog inputs on the expansion board. (...) (25 years ago, 10-Jan-00, to lugnet.robotics.handyboard)
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| | Re: More servo stuff
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Try placing a capacitor across +5V and ground. Get something in the range of 0.1 - 0.47 microfarads and just plug it into the headers on the HB. This solved my problems. -Scott Harris (...) (25 years ago, 10-Jan-00, to lugnet.robotics.handyboard)
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| | GP2D12 & Expansion Board
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Can I use the Lego ports on the Expansion board for the GP2D12? Do these ports have pull resistors and if so can they be disconnected so the pin float as required by the Sharp sensors? -Drew (25 years ago, 10-Jan-00, to lugnet.robotics.handyboard)
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| | [Fwd: pneumatic info]
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-- MIME ATTACHMENTS DISCARDED: 1. Content-type: MESSAGE/RFC822 Content-Length: 1160 (25 years ago, 10-Jan-00, to lugnet.robotics.handyboard)
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| | Re: Interfacing GP2D02 with handyboard
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If you are not conversant in assembly, it will be difficult to obtain code for each individual digital port unless you get someone to write it for you specifically. However, if you switch to GP2D12 sensors, and remove the pullup resistors on the (...) (25 years ago, 10-Jan-00, to lugnet.robotics.handyboard)
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| | serial comm between HB and custom software
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I am trying make a robot that communicates with a computer program build in borland C. can i use the serial port of the Handy Board? how do i send and receive commands or messages to and from the HB through my boland C program, using this serial (...) (25 years ago, 10-Jan-00, to lugnet.robotics.handyboard)
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| | Re: LEGO sensor
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oops! Thanks Dr. Martin for catching my mistake about the rotation sensor. - Nick - (...) (25 years ago, 10-Jan-00, to lugnet.robotics.handyboard)
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| | More servo stuff
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I believe someone asked a similiar question to this but I didn't get an answer (I don't think). Question relating to the HB expansion board and servo control (or lack of same). I can control standard servos (S148, 3003 etc.) just fine, they run as (...) (25 years ago, 10-Jan-00, to lugnet.robotics.handyboard)
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| | Re: LEGO sensor
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just to be clear, there are two types of LEGO sensor: active and passive: * passive -- touch sensor, temperature sensor. * active -- light sensor, rotation sensor (aka shaft encoder, angle sensor) without expansion board, the HB can only deal with (...) (25 years ago, 10-Jan-00, to lugnet.robotics.handyboard)
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| | Re: LEGO sensor
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The LEGO sensors and the RCX are the same thing. The standard Handy Board (without an expansion board) can handle all of the passive LEGO sensors such as the touch and rotation sensors. The expansion board is needed to use the active sensors such as (...) (25 years ago, 9-Jan-00, to lugnet.robotics.handyboard)
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| | Re: Higher voltage for HB battery
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I find that the ideal solution to this situation is to build a power system for the robot. Maxim, Linear Technology, and National each make very easy to use switching regulators that can provide highly efficient DC to DC conversion. Building a (...) (25 years ago, 9-Jan-00, to lugnet.robotics.handyboard)
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| | LEGO sensor
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Some of the expansion board kits (all? sorry, haven't been paying much attention to the extension boards yet) mention that they have slots for LEGO style sensors. Does this mean the sensors they use on their RCX/Mindstorms stuff? What's the (...) (25 years ago, 9-Jan-00, to lugnet.robotics.handyboard)
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| | Higher voltage for HB battery
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I would like to know whether the HB can be used with a 12 V (ten AA cell) NiCd battery instead of the standard 9.6 V (eight AA cell) NiCd battery. Specifically, (1) Would the HB be damaged by the higher voltage, (2) Would the HB function properly (...) (25 years ago, 9-Jan-00, to lugnet.robotics.handyboard)
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| | Re: Problem with my board
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In lugnet.robotics.handyboard, Gary Livick <glivick@pacbell.net> writes: The motor doesn't work in my program, which has multiple processes running, but it still doesn't work when i just send the command through IC's interactive window: motor(1,50). (...) (25 years ago, 9-Jan-00, to lugnet.robotics.handyboard)
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