 | | 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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| | Download problems
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Hello I just wanted to say that I have got the HB from Hong Kong two weeks ago but I didn't reply due to the fact that I had problems with my monitor Now that my computer works I am trying to see if the HB is working I have a problem: When I am (...) (27 years ago, 30-Aug-97, to lugnet.robotics.handyboard)
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| | HB IR transmit circuitry problem
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I just finished building my Handy Board and I was testing the IR transmit circuitry. I found that the oscillator was actually oscillating @ 57kHz instead of 39-41kHz. That makes it useless for now! I made sure to get the exact capacitor and resistor (...) (27 years ago, 30-Aug-97, to lugnet.robotics.handyboard)
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| | Re: IC version 3.1
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(...) Yes, the freeware MS-DOS/Windows tools have been known to have problems on some new/fast PCs. It all has to do with old serial drivers. Newton Labs stands behind the commercial product. I recommend that you try it. -Fred -- This message was (...) (27 years ago, 29-Aug-97, to lugnet.robotics.handyboard)
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| | IC version 3.1
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It has recently come to my attention that IC version 3.1 has been released. I have been using (actually struggling with) the earlier version that came with my purchase of an assembled Handyboard from Gleason Research. Does the new version work (...) (27 years ago, 29-Aug-97, to lugnet.robotics.handyboard)
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| | Re: Manipulate the LCD in assembler
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Folks, I gave it a little more thought, and had some coffee to wake me up. I remember now! Somehow I blew out the D0 line on my LCD and I had to use 4 bit mode from then on since the upper 4 addresses were still fine. I had forgotten that a long (...) (27 years ago, 28-Aug-97, to lugnet.robotics.handyboard)
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| | Re: Manipulate the LCD in assembler
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At 11:28 PM -0400 on 8/26/97, German Gentile wrote: Folks, Ok, I took a look at the code last night. I found simple errors like not initializing the stack, addressing variables in RAM chip when in single chip mode and forgetting to use # for (...) (27 years ago, 28-Aug-97, to lugnet.robotics.handyboard)
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| | RE: Size Conversions
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These sizes refer to the Unified Thread Standard. A 6-32 thread has 32 threads per inch and a nominal outer diameter of 0.138 inches. There are coarse (UNC) and fine (UNF) series (and some others that are less common), as follows: nom size major dia (...) (27 years ago, 27-Aug-97, to lugnet.robotics.handyboard)
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| | IC under NT
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(...) IC 3.1 for Windows 95/NT is written from the ground up as a 32-bit windows application, so the serial works fine under NT, regardless of the speed of your machine. If you want to try it out to see if it fixes your problem, here's a 7-day (...) (27 years ago, 27-Aug-97, to lugnet.robotics.handyboard)
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| | digital ins
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Hello again, I realized a solution to the amplified input problem that is simple and at least worth mentioning. A diode clamp (0-5V) does the job quite nicely, and is easy to build. I got the idea from Horowitz and Hill, "The Art of Electronics", (...) (27 years ago, 27-Aug-97, to lugnet.robotics.handyboard)
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| | Re: Help!!!! Handy Board Problem
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I am going to guess this is a software problem on the PC side. If you can boot your computer in DOS mode, try running IC then. Or find an older box :-(. Freeware DOS IC is known to have serial line comms bugs with some fast machines. NT can't be (...) (27 years ago, 27-Aug-97, to lugnet.robotics.handyboard)
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| | Size Conversions
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I apologize in advance as this question is completely of the list topics but I hope that somebody will have the answer. I am currently building a six legged walker using the Handyboard as the main CPU and using a modified Miniboard using the Servo16 (...) (27 years ago, 27-Aug-97, to lugnet.robotics.handyboard)
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| | Re: Microphone on a Handyboard
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If you need more than a +200 gain, try an LM358 in single supply mode and use +5v. These are fantastic op-amps and widely available (Digikey). jm (...) (27 years ago, 27-Aug-97, to lugnet.robotics.handyboard)
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| | Re: digital ins
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If you want to exaggerate the response, perhaps a LM339 +5v single supply comparator will do. Set up your circuit to go high(+5v) above your 2-3v range of operation. This solves all your input problems. Loads of manufactures make this thing. Data (...) (27 years ago, 27-Aug-97, to lugnet.robotics.handyboard)
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| | Microphone on a Handyboard
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(...) Assuming you've hooked the LM386's ground to ground and the + voltage to 5v, you should be set hooking the output of the LM386 to the analog input. Do not insert a capacitor in series, as might be shown for hooking up the LM386 to a speaker. (...) (27 years ago, 27-Aug-97, to lugnet.robotics.handyboard)
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