 | | 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 (...) (28 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: (...) (28 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 (...) (28 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 (...) (28 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 (...) (28 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 (...) (28 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 - (...) (28 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 (28 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. (...) (28 years ago, 10-Jun-98, to lugnet.robotics.handyboard)
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| | (no subject)
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--- Paul E. Rybski --- (URL) (28 years ago, 10-Jun-98, to lugnet.robotics.handyboard)
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