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 | | Strange question
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| Has anyone here used Electronic Workbench ? I've got a copy but it doesn't have schematics/models for the darlingtons (TIP120, 125, etc) I'm looking for spice models and ideally an symbol library. (yes it is for simulating various power control (...) (28 years ago, 5-Jun-96, to lugnet.robotics.handyboard)
| | | | | Re: voltage/current monitors
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| (...) Use a voltage divider (two resistors) to map the battery voltage to a 0 - 5v signal for the A/D converter. Depending on how much current your motors draw, you can put a .1 ohm precision resistor in series with the motor and measure the voltage (...) (28 years ago, 4-Jun-96, to lugnet.robotics.handyboard)
| | | | | voltage/current monitors
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| I'm interested in building a voltage monitor circuit for my robot's 6V battery, and a current monitor circuit for the motors. Is there an easy way to do this, with reasonable accuracy? I'd like to interface both of them to the analog sensors on the (...) (28 years ago, 4-Jun-96, to lugnet.robotics.handyboard)
| | | | | Re: Yup, it works.
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| The PWR light isn't really an indicator of power. It's actually hooked up to the 6811's serial transmit line, so it's supposed to flash when the 6811 is talking serial. the BATT light should always blink when the board is first switched on. It also (...) (28 years ago, 4-Jun-96, to lugnet.robotics.handyboard)
| | | | | (no subject)
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| Cris, I just built my HB last week, I can offer these comments.. The green power LED should flash while you are loading the board through the serial port. Actually, it's more of a flicker, it's just an indicator of serial activity. As far as the (...) (28 years ago, 4-Jun-96, to lugnet.robotics.handyboard)
| | | | | Re: Yup, it works.
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| I didn't have any problems with the LED's - mine came with a short lead and that always went into the square pad. I imagine I missed the C15 and C16 errors (tantalum vs electrolytic) because I bought a kit and just took the parts out of the packages (...) (28 years ago, 4-Jun-96, to lugnet.robotics.handyboard)
| | | | | Success, sorta!
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| My long-sought goal of bringing in 2 RC signals to the IC3 and IC2 counters, and sending them out via OC3 and OC2 was not achieved. I was never able to get OC2 to work, and I suspect I need new Pcode like what Randy Sargent wrote to use the buzzer (...) (28 years ago, 3-Jun-96, to lugnet.robotics.handyboard)
| | | | | Adapting the LMD18200
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| Over the weekend I decided to use the LMD18200 H-Bridge devices for a larger robot I am building. What I did was simply remove the L293 chip and replace it with a 16pin header and some rainbow ribbon cable. Before you decide this is for you, here (...) (28 years ago, 3-Jun-96, to lugnet.robotics.handyboard)
| | | | | Re: Yup, it works.
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| (...) I really tried hard to make this clear -- can you explain the difficulty you had? (...) Yup, you are right. You are either the first person to notice this, or the first to report it! (...) Quiescent RS-232 levels are -10v, so the minus voltage (...) (28 years ago, 3-Jun-96, to lugnet.robotics.handyboard)
| | | | | Yup, it works.
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| Well after much delay, I've finally got my first HandyBoard up and running. (I've got another one in parts, but that is a different story) I can confirm that HBDL.exe does *NOT* work on my 133Mhz Pentium under Windows '95. It does work on my 486/33 (...) (28 years ago, 3-Jun-96, to lugnet.robotics.handyboard)
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