| | pcode
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Is the pcode_hb.asm available for veiwing? I don't seem to have it in my Unix files and whenever I try to view it on the Macintosh it crashes. Thanks, -Dirk (28 years ago, 14-Jun-96, to lugnet.robotics.handyboard)
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| | expansion board
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Hi all, I want to but the handyboard to control a walking robot. The walking robot needs 6 motors and these cannot be servos. I think about using stepper motors. But the handyboard is only capable of driving four. So do I need the expansion board as (...) (28 years ago, 14-Jun-96, to lugnet.robotics.handyboard)
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| | sound files to tone(freq,time); sequences?
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I'd love to use the Handyboard buzzer to repeat a short warning on my mobile robot. Has anyone developed a program which can convert a WIN95 sound file (e.g., .WAV), or ANY sound file, into the proper IC tone commands? I'm so lazy I haven't even (...) (28 years ago, 13-Jun-96, to lugnet.robotics.handyboard)
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| | Re: hall effect
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There is a wiring diagram for a typical Hall Effect sensor included in the sensors/motors notes on the web site. -F (28 years ago, 11-Jun-96, to lugnet.robotics.handyboard)
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| | hall effect
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I'm trying to stick a shaft encoder on one of the wheels of my robot. In a search for the best way to do this, my current idea is to use a hall effect sensor, as has been recommended to me in the past. I've got a couple questions... First, where (...) (28 years ago, 11-Jun-96, to lugnet.robotics.handyboard)
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| | Encoder direction ?
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I am just wondering how I can hook up my encoder, which has two outputs (one for pulses and the other one for direction), with the handy board so I can read the number of pulses and also the direction of rotation. Thanx in advance. Hachemi (28 years ago, 9-Jun-96, to lugnet.robotics.handyboard)
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| | (no subject)
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I have finished the H-Bridge, and to my great suprise, IT WORKS!! (party, dude!). I have drawn a schematic diagram for others who may wish to use this circuit. It is posted to cherupakha.media.mit...ze/hbridge with pics in both IFF and GIF format, (...) (28 years ago, 9-Jun-96, to lugnet.robotics.handyboard)
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| | Polaroid info
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FYI: This info is copied out of the HB e-mail archive. There's lots of good stuff in there, it's pretty easy to search as plaintext. -Fred Polaroid 119 Windsor St, Cambridge, MA 02139 tel: 617.577.4681 fax: 617.577.3213 tel: 800.225.1000 ordering (...) (28 years ago, 8-Jun-96, to lugnet.robotics.handyboard)
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| | polaroid range finders
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Where can I purchase the polaroid range finders that are occasionally discussed on this list? Mark mbolding@vision.vsrc.uab.edu (28 years ago, 7-Jun-96, to lugnet.robotics.handyboard)
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| | are you a graduating student?
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If so, please me know if your e-mail address is about to be blown away. I've noted a surge in bad addresses on the list from the .edu sites. also, this is a reminder to all that the way to unsubscribe is to find your e-mail address by clicking the (...) (28 years ago, 7-Jun-96, to lugnet.robotics.handyboard)
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| | (no subject)
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(...) all sensor inputs have a 47K pull-up resistor. If you remove this (by cutting the trace between the sensor input pin and the 47K resistor pack), then the analog inputs are pretty high impedence, like a meg or so. You should get the "M68HC11 (...) (28 years ago, 7-Jun-96, to lugnet.robotics.handyboard)
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| | (no subject)
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Hi! Would you please let me know the input impedance of the AD circuit ? Thanks in advance. hajime (28 years ago, 7-Jun-96, to lugnet.robotics.handyboard)
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| | Re: your mail
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Yes, the h-bridge circuit is very, very, very confusing. Hmm. Well it's in my robot right now, so lemme see if I can remember how it works. Ok, let's see. First, you connect both of the emitters of the PNP power transistors to +6V or whatever. (...) (28 years ago, 6-Jun-96, to lugnet.robotics.handyboard)
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| | (no subject)
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I'm having a little truoble with the H-Bridge described in this mailgroup. I have MOST of the circuit OK.. The power bridge itself, Diodes, etc.. I am also OK with the optocouplers to 2n2907s.. I am just a bit confused with the description if the (...) (28 years ago, 6-Jun-96, to lugnet.robotics.handyboard)
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| | Serial IO
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Yesterday I experimented with the Serial IO code in the FAQ. I have a couple of questions though. Here is the basic program that I wrote to try to understand this stuff: I wrote this into hb_lib.c: void disable_pcode_serial() /* necessary to receive (...) (28 years ago, 5-Jun-96, to lugnet.robotics.handyboard)
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| | Re: Question on analog()....
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(...) Right; a voltage divider probably biases the microphone amp ckt at 2.5v. schematics are provided, no? -F (28 years ago, 5-Jun-96, to lugnet.robotics.handyboard)
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| | Re:Re: Question on analog()....
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(...) Are you sure about this? On page 49 of my copy, it states pretty clearly that the input range is 0 to 5 v. ---...--- Just returned home. I checked the IC Manual of "The Mobile robot Assembly Guide" for the Rug Warrior. On p.66, it reads "When (...) (28 years ago, 5-Jun-96, to lugnet.robotics.handyboard)
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| | Re: Question on analog(). Negative voltage
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(...) DO NOT SEND NEGATIVE VOLTAGES INTO THE 6811, you will destroy the analog input circuit. Any voltage outside of the 0 to 5 v range is hazardous, unless it is current-limited to a few milliamps. (...) Are you sure about this? On page 49 of my (...) (28 years ago, 5-Jun-96, to lugnet.robotics.handyboard)
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| | Question on analog(). Negative voltage
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Last time, I learned that the values of analog() corresponds to the voltage between 0 and 5. What if the signal to the analog port is a negative voltage. For example, -2 volt ? In that case, does that mean I have to use another formula or make some (...) (28 years ago, 5-Jun-96, to lugnet.robotics.handyboard)
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| | encoders??
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Let's see. First, I'd like to put a pair, if possible, of shaft encoders on my robot. (It's annoying not being able to tell how far I've gone!) Anyways, digital inputs 7 and 9 are being used by a 6500 Polaroid sensor and an RC servo. Is it still (...) (28 years ago, 5-Jun-96, to lugnet.robotics.handyboard)
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