 | | QRD1114/QRB1114 Questions
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Hi all, I am looking at the small description of these part in Digikey cat., it indicates that they have optimum sensing distance at .15". Does this mean that these parts are not suitable for avoidance detection ? Does any one use the parts for such (...) (28 years ago, 30-Mar-97, to lugnet.robotics.handyboard)
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| | Re: IR concept
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Chuck, If you have the scematics for the IR sensor that uses the 555 and opamp, Iw oudl be interested in looking them over. I understand your theory, but the scematics would save me some time in ironing out the nitty gritty stuff. Thanks. (...) (28 years ago, 30-Mar-97, to lugnet.robotics.handyboard)
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| | Q1 on HB PCB
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HI, The Q1 (ztx614) is the last part i need to complete the board, i don't plan on using an IR Tx so do I really need Q1 the complete the board? also we have been using the 6811 EVM/EVB and UDLP in our lab classes and would like to know if i can (...) (28 years ago, 30-Mar-97, to lugnet.robotics.handyboard)
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| | Frequency counting
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I am having trouble getting my frequency counting code to work.The version I am posting is a sort of test and should print out a frequency integer in Hz after approximately one second of processing.Instead what it does is print out all the values of (...) (28 years ago, 30-Mar-97, to lugnet.robotics.handyboard)
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| | re: IR frequency (fwd)
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Connect the ground from the oscilloscope to the HB ground (anyone). Connect the V from the oscilloscope to the + end of the LED driver (or the annode of the LED if it's connected). Adjust the oscilloscope until you get a visible square wave (...) (28 years ago, 30-Mar-97, to lugnet.robotics.handyboard)
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| | (no subject)
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Hello! I would like to know something: Does anyone know how the LCD screen on the Handyboard opreates? More specifically: 1) does it have 8 in ports (kinda like the opposite of a P.C.'s parallel port?) 2) does it have a strobe (or respond pin ) that (...) (28 years ago, 30-Mar-97, to lugnet.robotics.handyboard)
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| | Q1 : ztx614
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hi, I have been working on the handy board for a couple of weeks now and I'm having problems finding the ZTX614 NPN darlington transistor, Digikey has them on back order until mid april. I was wondering if there is reason that it should be placed on (...) (28 years ago, 29-Mar-97, to lugnet.robotics.handyboard)
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| | my HB project
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Well, I just finished putting together my handyboard project. I thought maybe people would be interested in checking it out. It is a robotic camera moving thingy that is mounted on the front of my fish tank. It can move the camera horizontally so (...) (28 years ago, 29-Mar-97, to lugnet.robotics.handyboard)
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| | re: IR frequency (fwd)
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(...) signals at exactly 38KHz? somebody had suggested using an oscilloscope..but how do i go about it? (28 years ago, 29-Mar-97, to lugnet.robotics.handyboard)
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| | Re: Sonar Transducer Multiplexor
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(...) The OC is simply a protective buffer to the SPI pins. When the SPI feeds a low with a pullup resistor it must be able to sink the current drawn by the resistor. I read some of the docs on the SPI pinouts and ("M68HC11 Reference Manual" Serial (...) (28 years ago, 29-Mar-97, to lugnet.robotics.handyboard)
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