 | | 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 (...) (28 years ago, 29-Mar-97, to lugnet.robotics.handyboard)
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| | Re: IR concept
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(...) [Digitize the output from an IR LED with and without a signal present to achieve some common mode noise rejection.] This type of system is susceptible to being 'blinded' by high intensity IR sources (try it outside :-) I used a similar (...) (28 years ago, 29-Mar-97, to lugnet.robotics.handyboard)
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| | u14
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I had trouble finding u14(LM 2931Z-5.0). I thought I might be able to use the 78LO5A that was suggested as a replacement on the mini board. When I try to test the voltage on pin 28 of U2 as described in part 2 of the assembly manual I get 6.3 volts. (...) (28 years ago, 28-Mar-97, to lugnet.robotics.handyboard)
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| | 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.) (...) (28 years ago, 28-Mar-97, to lugnet.robotics.handyboard)
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| | IR concept
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An alternate IR system.... I've been scanning through some of the IR stuff to see if I can't pick out a good solid system for collision avoidance on a short range (approx. 6-10cm) scale, but everything seems like alot of trouble. Some guys at Humber (...) (28 years ago, 28-Mar-97, to lugnet.robotics.handyboard)
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