 | | Re: Sensor questions
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(...) The Electronic Surplus Dealer Goldmine, (URL) been selling some weather balloon electronics innards for a few years. On this board there are some relevant sensors: a thermistor, some sort of barometric chip and a humidity "device". The (...) (25 years ago, 13-Jan-00, to lugnet.robotics.handyboard)
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| | IR Question
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Greetings, I've heard mention of the various Sharp IR sensors which can give different distance readings for different zones. Part of my final year project is to design and investigate various sensors, but I really have to generate the stuff myself (...) (25 years ago, 13-Jan-00, to lugnet.robotics.handyboard)
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| | Re: SPI Port
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I interfaced my Vector2X to the handyboard without using the SPI port and without any machine language. I set the compass to be in slave mode and used three digital outputs on the expansion board to control the RESET, SCLK, and SS lines. I used (...) (25 years ago, 13-Jan-00, to lugnet.robotics.handyboard)
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| | Re: Sensor questions
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You wrote: I then tried the LM34. There is no calibration pin and it uses farenheit. 1F=10Mv. For some reason, the output from this device varies very little with changes in the room temperature. Now the present room temperature is 58F, during the (...) (25 years ago, 12-Jan-00, to lugnet.robotics.handyboard)
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| | Re: Sensor questions
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(...) Sounds like fun! Go check out the EFI332 (hope I got that right) project. That's a project to build a 68332 board to control a larger engine. They'll probably have pointers to the different types of sensors that can be used with it, some of (...) (25 years ago, 12-Jan-00, to lugnet.robotics.handyboard)
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| | Re: Sensor questions
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(...) SNIP (...) Newark electronics used to sell a humidity sensor based on this principle for about $ 12. It should still be available. I believe it was made by Phillips. Basically the variations in capacitor value is used to vary the frequency of (...) (25 years ago, 12-Jan-00, to lugnet.robotics.handyboard)
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| | Sensor questions
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I have several sensor questions. I would like to use my miniboard as an engine management system. At the present time, I have a small 2 cycle engine from a weed wacker that I would like to control. I would like to have the miniboard gather some (...) (25 years ago, 12-Jan-00, to lugnet.robotics.handyboard)
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| | SPI Port
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Hello - I have two sensors that require the SPI port: the Sharp GP2D02 IR sensor, and the Precision Navigation Vector Compass. I'm hoping that someone can tell me how to use both of these sensors at the same time, on the same port or by using some (...) (25 years ago, 12-Jan-00, to lugnet.robotics.handyboard)
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| | Re: "Traces"?
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(...) That's exactly what I meant! I took a look in my dictionary ... "conductor path" may be the technical term. (25 years ago, 12-Jan-00, to lugnet.robotics.handyboard)
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| | PCB Designs
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HI Any of you guys out there in robo land have any good PCB designs for high powered motor driver, IRPD's or a nice Handy Boardish thing that you dont know what to call. Thanx -roboman PS Got a PCB etcher system for XMAS and want some PCB designs (...) (25 years ago, 12-Jan-00, to lugnet.robotics.handyboard)
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| | Re: "Traces"?
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(...) 'Trace', and 'track', are common parlance, for the wiring built onto the printed circuit board inside a unit. So the post is saying that you have to actually cut the copper 'tracks' inside the unit itself. Best Wishes (25 years ago, 11-Jan-00, to lugnet.robotics.handyboard)
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| | "Traces"?
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(...) I've seen "trace" used a couple times as regards the Handyboard, concerning the leads from/to the inputs, I think??? What does it mean, what are they? Thx :) - Scarius (URL) (25 years ago, 11-Jan-00, to lugnet.robotics.handyboard)
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| | Re: GP2D12 Pinouts
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(...) Just visit: (URL) are some modifications to the handyboard required, because the sensor does not work with the pull-up resistors on the handyboard. You have to cut some traces on the handyboard. A detailed description and a picture of the (...) (25 years ago, 11-Jan-00, to lugnet.robotics.handyboard)
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| | GP2D12
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I just managed to connect a Sharp GP2D12 to my Handyboard. The advantage compared to the GP2D02-device is the analog output which does not consume processing power for clocking the sensor. Further information can be found at: (URL) (25 years ago, 11-Jan-00, to lugnet.robotics.handyboard)
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| | RE: More servo stuff
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I had the same problem. The servo would run fine if the program was not doing anything else. But if I was updating the pwm to the motor ports then the servo would jitter. I figured it was because the extra overhead was screwing up the timing on the (...) (25 years ago, 11-Jan-00, to lugnet.robotics.handyboard)
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| | Re: More servo stuff
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(...) I did this but it didn't help. *sigh* Thanks for the tip! (25 years ago, 10-Jan-00, to lugnet.robotics.handyboard)
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| | Re: GP2D12 & Expansion Board
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You can cut the trace going to the pullup resistor corresponding to analog(0) on the main board and then all of the expansion board analog inputs will be floating. Analog(0) is multiplexed to provide all of the analog inputs on the expansion board. (...) (25 years ago, 10-Jan-00, to lugnet.robotics.handyboard)
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| | Re: More servo stuff
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Try placing a capacitor across +5V and ground. Get something in the range of 0.1 - 0.47 microfarads and just plug it into the headers on the HB. This solved my problems. -Scott Harris (...) (25 years ago, 10-Jan-00, to lugnet.robotics.handyboard)
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| | GP2D12 & Expansion Board
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Can I use the Lego ports on the Expansion board for the GP2D12? Do these ports have pull resistors and if so can they be disconnected so the pin float as required by the Sharp sensors? -Drew (25 years ago, 10-Jan-00, to lugnet.robotics.handyboard)
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| | [Fwd: pneumatic info]
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-- MIME ATTACHMENTS DISCARDED: 1. Content-type: MESSAGE/RFC822 Content-Length: 1160 (25 years ago, 10-Jan-00, to lugnet.robotics.handyboard)
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