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bill.french's Content
There have been 260 items by bill.french (Search limited from 06-June 23)
#6328 Eastern U.S Lunar Eclipse
Posted by bill.french on 21 December 2010 - 05:05 PM in General Discussion
#6322 Eastern U.S Lunar Eclipse
Posted by bill.french on 21 December 2010 - 01:02 PM in General Discussion
#7274 Introduction
Posted by bill.french on 08 January 2011 - 02:46 PM in General Discussion
Can anyone recommend a vendor for sensors?
Welcome!! What kind of sensors???
http://www.sparkfun.com/categories/23 is my favorite place to start.
#8170 LEDs for netduino
Posted by bill.french on 23 January 2011 - 02:39 PM in General Discussion
#7022 Newbie on Serialport
Posted by bill.french on 04 January 2011 - 11:39 PM in Netduino 2 (and Netduino 1)
#8692 Switching AC
Posted by bill.french on 30 January 2011 - 02:33 PM in General Discussion
http://powerswitchta...om/default.aspx
I had a 16hr steak and eggs for breakfast! What are you working on?
#8750 2 Potentiometers = Freeze-ups
Posted by bill.french on 31 January 2011 - 01:37 PM in General Discussion
#5165 Disposability
Posted by bill.french on 22 November 2010 - 03:43 AM in Netduino 2 (and Netduino 1)
#7636 Question about COM2
Posted by bill.french on 14 January 2011 - 06:05 AM in Netduino 2 (and Netduino 1)
If you are using COM2, are D7 and D8 (rts/cts) unusable for anything else? Or can the still be assigned as input/output ports?
#5786 Serial Communication via D0 and D1
Posted by bill.french on 05 December 2010 - 10:58 PM in Netduino 2 (and Netduino 1)
For serial, using D0 for RX (hooked to TX on my device) and D1 as TX (hooked to RX on my device), do I need anything other than:
var s1 = new SerialPort(SerialPorts.COM1, 9600); s1.Open()
... and then I can read and write using s1.Read and s1.Write?
What does .Read do if there's no data there? Does it just wait? Return garbage?
I'm getting data via s1.Read with nothing even hooked up to the netduino.
#5794 Serial Communication via D0 and D1
Posted by bill.french on 06 December 2010 - 02:50 AM in Netduino 2 (and Netduino 1)
#7932 About the forum (hard to read this theme)
Posted by bill.french on 19 January 2011 - 08:26 PM in General Discussion
#4111 Questions about time
Posted by bill.french on 22 October 2010 - 05:11 PM in Netduino 2 (and Netduino 1)
#4107 Questions about time
Posted by bill.french on 22 October 2010 - 04:27 PM in Netduino 2 (and Netduino 1)
#4748 want little help
Posted by bill.french on 09 November 2010 - 06:08 PM in General Discussion
http://www.parallax....83/Default.aspx
to sense the motion, which could then alert something to start recording, or raises some other sort of alert.
#5982 AnalogInput hardware error
Posted by bill.french on 11 December 2010 - 01:58 AM in General Discussion
#5984 AnalogInput hardware error
Posted by bill.french on 11 December 2010 - 02:11 AM in General Discussion
Maybe try something like this:
instead of:
AnalogInput analogPin = new AnalogInput(inputPin);try:
using(AnalogIntput analogPin = new AnalogInput(inputPin)) { ...your other code... }
... but then again analog input might not be idisposable, so this might not help.
I'm about to jump onto my other computer and can try it out myself.
#5986 AnalogInput hardware error
Posted by bill.french on 11 December 2010 - 03:52 AM in General Discussion
public static double ReadLM34(Cpu.Pin inputPin) { // Reads an LM34 analog temperature sensor several times and converts the // Code example for potentiometer at: // http://forums.netduino.com/index.php?/topic/638-basic-analog-input-circuit-and-program/ int vRef = 3300; // 3300 mV, or 3.3V int readingTot = 0; // Summed total of the iterations int numReads = 10; // Number of times to take a reading double tempF = 0.0; // AnalogInput analogPin = new AnalogInput(inputPin); // Take a number of readings and average them together to get the final // temperature calculation for (int i = 0; i < numReads; i++) { readingTot += analogPin.Read(); } tempF = (readingTot / numReads) / 1024 * vRef / 10; analogPin.Dispose(); return tempF; }
#4788 Netduino power
Posted by bill.french on 10 November 2010 - 03:49 AM in General Discussion
#4925 Measuring Analog Value and output it on console?
Posted by bill.french on 15 November 2010 - 12:04 AM in General Discussion
#11580 Trenton Computer Festival this weekend!!!
Posted by bill.french on 02 April 2011 - 01:47 AM in General Discussion
Anyway, this weekend is the Trenton Computer Festival! (in Trenton, NJ) There's going to be an all-day "Arduino Workshop", which could be of particular interest, including an open hack time, which I'm hoping to bring my Netduino+ to.
Also, the flea market has traditionally had a wider variety of computer stuff, some older stuff, junk, etc. -- as compared to most computer flea markets.
Either way, everyone enjoy your weekend!
#7877 "Open Collector"
Posted by bill.french on 19 January 2011 - 12:30 AM in Netduino 2 (and Netduino 1)
Master Reset signal. Internally pulled up to 3.3V via a 4.7K resistor. An
active Low pulse greater than 2 micro-seconds will reset the module. If
the module needs to be reset externally, only use open collector type
circuits. This pin is not driven low by any internal conditions. The host
should control this pin via one of its port pins using an open
collector/drain arrangement.
From wikipedia, I feel like I have a good handle on what "open collector" means -- but how do I do that with a netduino?
#7905 "Open Collector"
Posted by bill.french on 19 January 2011 - 12:49 PM in Netduino 2 (and Netduino 1)
#5659 Pre-Assembled Kits
Posted by bill.french on 02 December 2010 - 07:26 PM in General Discussion
#6382 So, what's on everyone's Christmas List??
Posted by bill.french on 22 December 2010 - 06:25 PM in General Discussion
If you had a list of stuff that a magical creature would pick from and deliver to you via your chimney Saturday morning, what would be on it??
Here's mine:
- www.stepgenie.com - stepper motor controller
- a stepper motor to experiment with
- an LCD display
- netduino mini
- Make magazine subscription
- and since i've been really good this year: http://www.saleae.com/logic/ logic probe system everyone keeps talking about
Please note: no socks on this list!!
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