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| you can't power 2 servos from the hb's own +5v supply. get a separate 5v supply (linear regulated, *noT* a switching supply, OR batteries) and run your servo power from that. connect this external supply ground to the HB motor ground (on J13). -Fred (...) (28 years ago, 2-Mar-97, to lugnet.robotics.handyboard)
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fred
(score: 0.064)
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| | Re: Reducing Battery Pack Voltage
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| as has been discussed on this list, the Handy Board wasn't really designed for three volt toy motors. Reducing the voltage and doubling the motor chips is a reasonable approach, however. The Handy Board requires 7.2 volts to operate, because of the (...) (28 years ago, 1-Mar-97, to lugnet.robotics.handyboard)
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fred
(score: 0.063)
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| | Re: handy board analog inputs
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| yes, they do. In case you didn't know, schematic diagrams for the Handy Board are available from the web site. They show this wiring, including the fact that the user knob is wired to PE7. -Fred -- This message was composed using Articulate Systems' (...) (28 years ago, 26-Feb-97, to lugnet.robotics.handyboard)
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fred
(score: 0.063)
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| | Re: Handy Board serial routines
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| (...) /* ---...--- SENDING AND RECEIVING THROUGH THE SERIAL LINE ---...--- the IC program must be stopped in order for this to work ! the code is from the handybaord FAQ by Fred Martin or ?? Randy Sargent ?? added by Xavier Chabot, 3-3-97: (...) (28 years ago, 14-Mar-97, to lugnet.robotics.handyboard)
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fred
(score: 0.063)
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| | Re: More Motor Speeds
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| it's harder than you might expect, b/c the PWM routine is 'hard-wired" into the pcode file. basically, you have to make the changes in pcode.asm, and reassemble the pcode_hb.s19 file. -fred In your message you said: (...) (28 years ago, 23-Feb-97, to lugnet.robotics.handyboard)
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fred
(score: 0.063)
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| | Re: non-linear motor speed problem
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| (...) The (small) load presented by the gears makes it behave quite well with pure DC (...) Sadly, the servo motors have oodles of oomph (the correct technical term for torque etc). My little bot is really a micromouse in training and very light so (...) (28 years ago, 11-Mar-97, to lugnet.robotics.handyboard)
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fred
(score: 0.063)
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| | Re[6]: IR Collision avoidance
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| Adam, I have it working, but I want to tidy it up a bit. At the moment it uses 2 op-amp stages, I think it can work with one. After all, it's just a precision diode! I will put something on in a few days. Fred, I do not have schematic capture (...) (28 years ago, 10-Mar-97, to lugnet.robotics.handyboard)
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fred
(score: 0.062)
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| | Re: running .s19
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| does your program to anything else other than attempt to leave special mode? You could have it write a value to the motor address ($7000); that would be a more visible indication that it is running. BTW, why is your first instinct to take it out of (...) (28 years ago, 19-Feb-97, to lugnet.robotics.handyboard)
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fred
(score: 0.062)
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| | Re: Re[2]: phone cord length
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| Sorry Fred, but I must respectfully disagree..... Fred G. Martin wrote: (snip) (...) Actually it is phone cords which are the crossover type. Use of a patch- cord tester confirms this. I am not familiar with any RJ11 network cables, but I know that (...) (28 years ago, 7-Mar-97, to lugnet.robotics.handyboard)
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fred
(score: 0.062)
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| | Re: HELP!
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| when using DLM, does the downloader make it to the second stage of the download, indicating "synchronized"? also, when attempting to download "config0c.s19," do you give DLM the command line flag indicating to burn EEPROM and not RAM? you must tell (...) (28 years ago, 18-Feb-97, to lugnet.robotics.handyboard)
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fred
(score: 0.062)
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| | Re: MEMORY FAULT
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| This problem is answered in the Handy Board FAQ. You are loading the wrong s19 file. -Fred -- This message was composed using Articulate Systems' PowerSecretary, a Macintosh-based speech-to-text dictation system. Please forgive any sloppiness in the (...) (28 years ago, 16-Feb-97, to lugnet.robotics.handyboard)
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fred
(score: 0.062)
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| | Help! - Strange Bug.
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| Hi All, I have recently completed construction of a Handyboard which passed all it's initial tests with the downloader, pcode and hbtest.c program, thanks to some help from Fred Martin, and I am now enjoying writting some programs for it. However I (...) (28 years ago, 5-Mar-97, to lugnet.robotics.handyboard)
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fred
(score: 0.062)
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| | Re: Motors & handyboard
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| (...) 3v toy motors are noisy little buggers and were never designed to be anywhere near a microprocessor. if you reduced the hb motor battery supply to 3v, you might have a chance. at 9v, i really doubt it. -f (...) (28 years ago, 15-Feb-97, to lugnet.robotics.handyboard)
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fred
(score: 0.062)
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| | Vector2x SPI interrupt driven code
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| Well it works. A couple people have asked for it. Turns out the stupid V2X docs are wrong again! Like the product, but bad docs will kill it! Even if you don't have a V2X, I have seen enough traffic asking about using the SPI for things on the HB, (...) (28 years ago, 5-Mar-97, to lugnet.robotics.handyboard)
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fred
(score: 0.062)
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| | Re: Motors & handyboard
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| (...) how did you take this measurement exactly? I think 75 mA might be kind of low, most motors will draw this much when they are just spinning but doing no useful work, but then draw much more when they are driving a geartrain. (...) actually, (...) (28 years ago, 14-Feb-97, to lugnet.robotics.handyboard)
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fred
(score: 0.062)
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| | Re: Port E inputs
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| the 6.270 has a diff anlg ckt. remember, the app b is generally applicable, but some details are different. -f In your message you said: (...) (28 years ago, 14-Feb-97, to lugnet.robotics.handyboard)
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fred
(score: 0.062)
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| | Reducing Battery Pack Voltage
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| Hi Fred I am attemping to run two low voltage DC motors (as motors 0 and 1), around 3V each(I don't have specs). I have piggybacked two of the motor driver chips (and maybe adding a third) to handle the higher current but they are still getting (...) (28 years ago, 1-Mar-97, to lugnet.robotics.handyboard)
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fred
(score: 0.062)
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| | Re: as11_ic
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| There are two fundamentally different ways to go about writing assembly language programs for the Handy Board: 1. Write them as callable functions for the Interactive C environment, using the as11_ic program. 2. Scrap Interactive C entirely, and (...) (28 years ago, 12-Feb-97, to lugnet.robotics.handyboard)
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fred
(score: 0.062)
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fred
(score: 0.062)
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fred
(score: 0.062)
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