 | | Multi-tasking under IC (Freeware version)
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I am somewhat new to handyboards and IC, so bear with me if this issue has been dealt with before. (I did check the FAQ and "some" of this list's archives prior to posting.) Under IC (the freeware version) cooperating processes communicate using (...) (26 years ago, 11-Jun-98, to lugnet.robotics.handyboard)
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| | Re: motor selection
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(...) From the archive: Date: Tue, 3 Mar 1998 17:12:30 -0500 (EST) (...) I have a sonar mounted on a panning servo, and I just bought an el-cheapo Cirrus CS-50. (It is functionally equivalent to a JR/Hitec JR-507 or HS-300). It works fine, although (...) (26 years ago, 11-Jun-98, to lugnet.robotics.handyboard)
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| | RE: input impedance
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Never mind, I have managed to solve the problem by cutting the trace between the 47k pull-up resistor and the sensor input. -----Original Message----- From: Joe Martin [SMTP:joema@mpx.com.au] Sent: Wednesday, 10 June 1998 18:29 To: (...) (26 years ago, 11-Jun-98, to lugnet.robotics.handyboard)
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| | D/A converter
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"Hi", from Hector Noriega, I am trying to send a data byte from port C out to a D/A converter faster than 1KHZ (target about 10KHZ) . I wrote a test subroutine in assembly code but I can not enable the address decoder using port B for the msb and (...) (26 years ago, 11-Jun-98, to lugnet.robotics.handyboard)
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| | onboard IR receiver
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the problem that i was having with the onboard IR receiver is that the codes that i retrieved from the ir_data() function were inconsistant from the same remote control button. the error was usually manifested in multiples of two, which lead me to (...) (26 years ago, 11-Jun-98, to lugnet.robotics.handyboard)
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| | Re: motor selection
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Where is your source and how do the Cirrus compare to Futuba in price? At a local hobby store in Houston I bought 2 Futuba 3003 (I think) that are the replacements for the 148 which I believe are no longer being made. They cost me about $13 but list (...) (26 years ago, 11-Jun-98, to lugnet.robotics.handyboard)
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| | Re: input impedance
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(...) Hmmmmmm.. as I recall, there are 47k pullups on those inputs. These are used to condition the signals when used as a digital input. The 'HC11 pink book suggests that any input resistance of greater then 10K will "...degrade A/D accuracy." The (...) (26 years ago, 11-Jun-98, to lugnet.robotics.handyboard)
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| | Re: Question about Sharp IR demodulators
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I had a similar experience, except that all my IR demodulators were from Radio Shack; two were some I'd gotten in a "grab bag" quite a few years ago, and the others were brand new. The original one reacted to 40KHz the way you describe yours doing - (...) (26 years ago, 11-Jun-98, to lugnet.robotics.handyboard)
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| | motor selection
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Can anyone tell me what is a good servo motor? I haven't had any experience and would like some input on names of servos to choose from. I am looking for a model number and company. Chris Rhodes (26 years ago, 10-Jun-98, to lugnet.robotics.handyboard)
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| | Question about Sharp IR demodulators
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Hi everyone, First, sorry for the blank message just now -- hit the send button instead of the cancel. I'm working on a project where I've got robots hunting targets equipped with a 40 kHz oscillator circuit which is continuously pulsing an IR LED. (...) (26 years ago, 10-Jun-98, to lugnet.robotics.handyboard)
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