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As I mentioned in the previous mail message my IR transmitter on the handy board oscillates @57kHz. I ordered the exact parts# form digikey as specified in the HB documentation and also did the math. The result should be a freg between 39 -40kHz. (...) (27 years ago, 3-Sep-97, to lugnet.robotics.handyboard)
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| | Re: HB IR transmit circuitry problem
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what value are you using for the R4 resistor? There was an incorrect value in some of the Handy Board documentation and it might not be fully expunged. Also, are you using a polypropylene capacitor for C6. -Fred -- This message was composed using (...) (27 years ago, 3-Sep-97, to lugnet.robotics.handyboard)
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I have a question to ask I want to use two 16V (maybe a bit more) motors and one 9V the question is To use either an Opto Darlington Isolator that my supervisor knows about, which uses the digital outputs or to cut the trace close to the J13 and (...) (27 years ago, 31-Aug-97, to lugnet.robotics.handyboard)
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It worked so thanks everybody It was the voltage it needed 12V Thanks again (27 years ago, 31-Aug-97, to lugnet.robotics.handyboard)
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| | Re: L293 Questions
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warm is normal, burn your fingers hot is not. jm (...) (27 years ago, 31-Aug-97, to lugnet.robotics.handyboard)
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| | Re: HB problem
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You need a 12V adapter and if both PWR and Batt are not OFF you are not in download mode. jm (...) should I > increase or decrease the voltage (...) (27 years ago, 31-Aug-97, to lugnet.robotics.handyboard)
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| | L293 Questions
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Hi all! Just for being sure: Is it normal that the L293Ds become warm when drawing ~0.5A for an extended period? Thanks, Jan (27 years ago, 31-Aug-97, to lugnet.robotics.handyboard)
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| | HB problems
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I have a problem: When I am trying to download the pcode_hb.s19 file a (...) I am using an adaptor providing 9V is that enough or should I increase or decrease the voltage When I provide the voltage on the HB pressing the STOP button the yellow (...) (27 years ago, 31-Aug-97, to lugnet.robotics.handyboard)
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| | Re: Download problems
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Usually, PC has two external serial ports (DB9 and DB25). The DB9 usually used by your mouse, and DB25 is connected to the external modem. The HB should be connected to DB25 in place of external modem, and it is usually configured as COM2. Another (...) (27 years ago, 31-Aug-97, to lugnet.robotics.handyboard)
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| | Re: Download problems
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Did you put the HB in download mode: power up while holding down the stop button? What box do you have? A Dell? I know of an issue with older Dell com ports. just guessin', jm (...) (27 years ago, 30-Aug-97, to lugnet.robotics.handyboard)
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