 | | Re: IR concept
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In addition.... Perhaps I could use the on board IR header to turn on the 4 IR diode array with each diode in series with a current limit resistor and in parallel with the IR output header..?? (I think this has been suggested before.) (...) (27 years ago, 28-Mar-97, to lugnet.robotics.handyboard)
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| | Sonar Transducer Multiplexor
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In your BMP circuit diagram that you posted recently, why did you use an open collector to feed the base of the transistor? Would it work if you connected the digital signal directly to the base? ---...--- ericson mar Master of Engineering Candidate (...) (27 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 (...) (27 years ago, 29-Mar-97, to lugnet.robotics.handyboard)
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