 | | Lithium ion rechatgeable battery & handyboard?
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Dear, Hi, i am currently works on a wheeled mobile robot project. I need a 12v external power supply to power my 3 minimotors (12V & 4.2watt) since handyboard only can support up to 9v and 1 amp. I want something light and provide high amp. I found (...) (22 years ago, 15-Oct-02, to lugnet.robotics.handyboard)
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| | Re: More Battery Questions
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Replacement battery options are listed on the HB FAQ, at: (URL) don't you get the 1000 mAh packs from Radio Shack? That would give you 2x the run time of the 500 mAh packs. Take longer to charge, but would require no other board mods. Fred (...) (22 years ago, 12-Oct-02, to lugnet.robotics.handyboard)
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| | More Battery Questions
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Hi, First I wanted to thank the handful of people that responded to my previous question about HB batteries. We seem to be getting by using Fred's suggestions, basically being more careful about charging, using ZAP mode to pull up really dead packs, (...) (22 years ago, 11-Oct-02, to lugnet.robotics.handyboard)
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| | I just did a quick scout around and....
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(...) A few minutes ago, my curiosity got the better of me about this, so I did a quick scout about on the web and found this: (URL) I'm not trying to endorse this company in particular, I'm mentioning it here as an example of what I was referring (...) (22 years ago, 10-Oct-02, to lugnet.robotics.handyboard)
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| | Re: Handyboards for Dummies, etc.
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(...) Well, first of all, injection moulding may not have to be the only option. Thermoforming may be another alternative that to my understanding does not carry anywhere near the initial expense as injection moulding. Secondly, what might make it (...) (22 years ago, 10-Oct-02, to lugnet.robotics.handyboard)
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| | Re: Handyboards for Dummies, etc.
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A case as you describe it would be nice. To me it's largely a cost issue. Custom plastic is expensive to set up -- thousands of dollars for an injection mold. Anyone care to open-source a design? That would be a start :-). Fred (...) (22 years ago, 9-Oct-02, to lugnet.robotics.handyboard)
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| | Handyboards for Dummies, etc.
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Can someone please enlighten me as to why the handyboard is only available as a bare motherboard? Although that may be fine for experiments in controlled environments, it doesn't work at all well for less than ideal circumstances such as out of (...) (22 years ago, 9-Oct-02, to lugnet.robotics.handyboard)
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| | Re: Handyboard and 1400 mAh NiMH battery
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Hey -- I like your device. That's a nice addition to the HB. I would like if you would modify your assertion "However these days NiCd battery are hard to find and not very effecient" (sic). This is not true. Despite the technical superiority of (...) (22 years ago, 8-Oct-02, to lugnet.robotics.handyboard)
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| | Handyboard and 1400 mAh NiMH battery
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Hi I have developed Handyboard battery charger addon ckt which replaces the 47 ohm resistor on handy board battery charger. this battery charger ckt let you put NiMH battery up to 1600 mAh without woring overcharging and other problem. if you are (...) (22 years ago, 8-Oct-02, to lugnet.robotics.handyboard)
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| | HB and Pocket PC
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Hi, I’d like to get my Handy Board communicating with my Pocket PC(HP Jornada) via the Pocket PC’s IrDA and the Handy Board’s IR port. Has anyone of you ever tried that? Your help would be really appreciated! Best regards, Jan (22 years ago, 7-Oct-02, to lugnet.robotics.handyboard)
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| | Re: HB Sun tracking system
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Hi You need 4 photo-resistor and two small plattes like "walls" (e.g. built with lego). On your device you mount one platte horizontal and the other vertical. The two small walls have to be mounted rectangular to your device in the direction to the (...) (22 years ago, 2-Oct-02, to lugnet.robotics.handyboard)
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| | Re: Interactive C Version 4
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Fred, Can you tell me if Randy upgraded InteractiveC in version 4 to handle the 64k hack for the Handyboard? You wrote about the hack in the Handyboard FAQ in '98, and that was two IC versions ago. Is it possible that Randy took into acount the 64k (...) (22 years ago, 1-Oct-02, to lugnet.robotics.handyboard)
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| | HB Sun tracking system
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I am just about finished assembling with HB. I want to build a system to track the sun. I have some ideas on how, but I am little rusty both in hardware and software. I asking any of you have something to help me in my project. I really appreciated. (...) (22 years ago, 30-Sep-02, to lugnet.robotics.handyboard)
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| | Re: Upgading HB to 64K
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My bad, the link I gave yesterday is to IC4, Randy Sargent's wonderful freeware version of InteractiveC for the Handyboard. The links to the 64k hack to the Handyboard are at the simpleRTJ site, which are ... www.rtjcom.com/6811/hb.html (...) (22 years ago, 27-Sep-02, to lugnet.robotics.handyboard)
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| | Re: Upgading HB to 64K
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Peter and all on lugnet.robotics.handyboard, The link Peter gave on Oct 14, 1999 is now dead! The new link is ... www.kipr.org/ic/download Randy Sargent now works for the KISS Institute for Practical Robotics, and has his work on IC3 and IC4 there. (...) (22 years ago, 26-Sep-02, to lugnet.robotics.handyboard)
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| | Handy Board for sale
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Hi, forgive me if you already saw this note on the Handy Board Yahoo group. I have a Handy Board that is over two years old I'd like to sell. It has been stored in a project box so it is still in great condition. I just recharged it and downloaded (...) (22 years ago, 18-Sep-02, to lugnet.robotics.handyboard)
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| | Re: Over Charging
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Fred, We had the same problem and traced it to the resistor. We can try the ZAP mode, but for future reference we would like to know the value you used to replace the 47 Ohm 1/2 watt resistor. Any chance we could get that information? Thanks, Dan (...) (22 years ago, 11-Sep-02, to lugnet.robotics.handyboard)
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| | Re: Over Charging
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When the batteries are really run down, they can draw too much current through the on-board charging circuit. (I'm assuming you are plugging adapters directly to the HBs, rather than going through the serial interface/phone line charge ckt.) About 6 (...) (22 years ago, 3-Sep-02, to lugnet.robotics.handyboard)
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| | Over Charging
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I have a collection of HandyBoards I'm trying to prepare for class this fall. They're a few years old now and have seem some fairly heavy use. I'm having trouble charging them and am hoping there's a component to replace or something I can fix to (...) (22 years ago, 3-Sep-02, to lugnet.robotics.handyboard)
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| | Re: assembler time delay?
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Tomas, NOP is the easiest way while staying within a single program. If you want to measure long periods of time, you could attach some code to the 2khz interrupt timer (documented in the handyboard manual). Just setup a memory space to use as a (...) (22 years ago, 24-Aug-02, to lugnet.robotics.handyboard)
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