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Frank's Content
There have been 62 items by Frank (Search limited from 06-June 23)
#4766 Basic Analog Input Circuit and Program
Posted by Frank on 09 November 2010 - 08:53 PM in General Discussion
#4735 Basic Analog Input Circuit and Program
Posted by Frank on 09 November 2010 - 02:58 PM in General Discussion
#5561 Netduino Plus home automation
Posted by Frank on 01 December 2010 - 01:38 AM in Project Showcase
#4861 FPGA shield alpha
Posted by Frank on 12 November 2010 - 03:12 PM in Project Showcase
#6973 Pinout Cards
Posted by Frank on 04 January 2011 - 11:49 AM in General Discussion
#5709 Netduino Book - Getting Started with the Internet of Things
Posted by Frank on 03 December 2010 - 09:20 PM in General Discussion
#4989 Netduino RS232
Posted by Frank on 16 November 2010 - 10:45 PM in Netduino 2 (and Netduino 1)
Awesome; thanks for posting about this. That's a great option as well.
And yes, you'll want to get a 3.3V version if you can. The Netduino's microcontroller can accept 5V signals--but it sends 3.3V signals. Many "5V TTL" converters can understand 3.3V signals, but some need higher voltage signals.
Chris
Thanks to AlfredBr and Chris for good answers. My order for the cable is on the way from Adafruit!.
Nothing against Sparkfun, but I've used them twice and I thought I'd pass the wealth around to more of the
firms.
#4980 Netduino RS232
Posted by Frank on 16 November 2010 - 08:00 PM in Netduino 2 (and Netduino 1)
#4983 Netduino RS232
Posted by Frank on 16 November 2010 - 08:15 PM in Netduino 2 (and Netduino 1)
From what I've read, the Mini can handle RS-232 levels (+12/-12) on one set of serial pins and TTL levels on the other. The Classic and the Plus take TTL only on all serial pins.
Yep, believe that is correct !
It's the Netduino and the Plus that I am not certain about.
Nicest Fall in Maine in years, and I'm sitting down cellar banging a keyboard. Ah, retired life !
#5082 Netduino RS232
Posted by Frank on 20 November 2010 - 01:25 AM in Netduino 2 (and Netduino 1)
#8001 Wild idea for a group project
Posted by Frank on 20 January 2011 - 04:00 PM in General Discussion
Although it is nice that we think of all these complex things to do (send certain data), we still need to figure out how to actually get them to talk to each other, so if this is something that we are seriously doing (i want to!) we first need to decide on a method for the actual communication. Then we can all have a vote on what to send or whatnot.
I'd love to get it simpler than that. I'd dearly love my Netduino, after reading temp from a DS18B20 to simply send my website http://www.xxxxx.xxx/?A1234.
This may seem simple to a lot, but it's stumped me for days. I finally got my website to acccept, and parse and refresh the temp box on the mainpage with that line, but I can't get it sent.
I don't want complexity, and great options. I want just that line. Isn't it possible to have a method for ANY Netduino Plus, that when fed a URL , will send it?
Probably just whining, but after chasing one of my own stupid errors for two days, I'm beat !
#8039 Wild idea for a group project
Posted by Frank on 21 January 2011 - 02:39 AM in General Discussion
Frank,
Have you looked at the SocketSample sample app which comes with the .NET MF 4.1 SDK? If you pass it that line as a URL, it should "request" that page--and you can just throw away the response. Make sure that you disable the proxy server in that sample.
Chris
Never knew they were there ! Thanks, that should help, AND the new update to the Getting Started with the Internet of Things was just released at Safari and it looks like another great source of stuff I never knew !
Thanks Chris.
#2629 Stay close to your computer (or come to MakerFaire)...
Posted by Frank on 22 September 2010 - 09:57 PM in General Discussion
#9171 Help required with Update firmware to 4.1.1
Posted by Frank on 08 February 2011 - 05:37 PM in Netduino Plus 2 (and Netduino Plus 1)
#3436 Arduino and Netduino pros and cons
Posted by Frank on 04 October 2010 - 02:54 AM in General Discussion
just get the raw MCU and program it like a "real man" hehe.
Oh, that made me laugh ! I've done my duty, 8080, 6502, 6800, 6809, and it took me ages
to 'trust' 'C' code and libraries written by someone else. My Visicalc floppy is hanging on the
wall next to the battery powered paper tape rewinder, and right underneath the Windows 1.0
floppies.
If you need a sweet deal on a stockpile of Tandy Color Computer ICs I can help you there. That was
enough to make a 'real man' out of many people. LOL I keep looking for my ASM disks, and assembly
books, but I just can't seem to find them.
Thanks though for the reply. I'm pretty new to both the Arduino and the Netduino, but that was the
way I was looking at them also. Aduinos around the house and garage, feeding data back to the Netduino, and then
local storage, or net. After 8 years of retirement it's feeling good to beat a keyboard again, and I always
loved the smell of solder.
I am using original 7400 A series a lot. They're probably collector items now, eh ?
#3420 Arduino and Netduino pros and cons
Posted by Frank on 03 October 2010 - 06:10 PM in General Discussion
#2683 Netduino Speedometer?
Posted by Frank on 23 September 2010 - 04:12 PM in General Discussion
My idea is to make a digital speedometer for a vehicle by tapping into the vehicle speed sensor (VSS) feed from the powertrain control module (PCM) to the instrument cluster. The VSS on the transmission sends a digital signal to the PCM. Most applications vary, but the vehicle I'll be working with has a VSS that sends out 4000 pulses per mile.
Everything since 1993 ? has an ODBII connector, usually under the dash above the driver's right knee. Monitors general Obd-2 data: Fuel system (open/closed loop status), Engine load, Coolant temperature, Manifold Pressure, Engine Rpm, Vehicle speed, Timing advance, Intake air temperature, Intake air flow rate, Throttle position, Secondary air status.
Google OBDII , and you'll find a gaggle of articles and projects about interfacing.
#2927 Anyone interested in an eagle version of the Netduino files?
Posted by Frank on 26 September 2010 - 04:00 PM in General Discussion
Great idea, thanks to work on it ... Very interested for Netduino Plus ...
Pascal
Put my name on the list !
#8102 1-WIRE
Posted by Frank on 22 January 2011 - 03:01 PM in Netduino Plus 2 (and Netduino Plus 1)
I have had very good luck with this unit: http://www.phanderso...mp/onewire.html
I agree ! Mine works well, and the price is hard to beat.
#9298 1-WIRE
Posted by Frank on 11 February 2011 - 02:20 AM in Netduino Plus 2 (and Netduino Plus 1)
Having received my NP+ today, I've now got the IP connectivity working for starters. Tomorrow's job will be to get 1 wire working. I've had lots of success in the past with the HA7S adapter ( http://www.embeddedd...r-SIP_p_23.html ) so that's what I'll be working with. I'm only going to be working with DS18B20 temperature sensors so that's all my code's going to support but I'll post it as soon as I've got it working.
Phil
How'd this work out for you ?
#6486 A project suggestion - for Netduino, Plus, or mini.
Posted by Frank on 24 December 2010 - 05:54 PM in General Discussion
From what I've been reading, OneWire is actually really hard. The timings are very precise. Even the Adruino playground references Dr. Anderson's chip as an alternative that "reduces the workload inside the Arduino". Some sort of interrupt or other delay in the middle of it and you're sunk.
Although I might just be trying to justify my purchases to myself.
I've been bouncing around on my thoughts on this one. Part of me started to be a purist, and stay with the Netduino. Then I ordered the package from PhAnderson, for a couple reasons: one, it's under $10 bucks, and two, I was curious. Go read his site, and you can't help but be intrigued!
A week later, I received a small envelope with a sheet of paper, and a plastic envelop inside. I'm at that stage now. You can service 6 DS18B20s with it. As soon as I get my focus back on the hardware end, I'll give it a spin. Upside says it's cheaper than buying an Arduino, and doesn't seem that it will use more I/O pins on the Netduino.
When you say the OneWire is actually really hard, I chuckled. All the more reason to get it running! But, it made me think , is it really hard, or is it a matter of reliablity and stability ? I'd love for some input from others. I tend to build stuff and forget about it. Is OneWire going to be more, or less. stable with different methods?
It does require soldering. And that apparently stops some folks. It shouldn't but I understand the apprehension.
#6404 A project suggestion - for Netduino, Plus, or mini.
Posted by Frank on 22 December 2010 - 09:52 PM in General Discussion
#6413 A project suggestion - for Netduino, Plus, or mini.
Posted by Frank on 23 December 2010 - 01:24 AM in General Discussion
#6750 A project suggestion - for Netduino, Plus, or mini.
Posted by Frank on 31 December 2010 - 02:14 PM in General Discussion
#2630 $10 GPS receiver?!
Posted by Frank on 22 September 2010 - 10:00 PM in General Discussion
If it has an internal cable going from serial to a USB-TTL chip, you can simply attach there.
Since it's a high volume product, they may have integrated the USB/serial very tightly (which would be significantly tougher)...not sure.
Either way, sounds like a fun experiment.
Chris
Dsrn, I've got one of those tucked away somewhere I got for free on Freecycle. Now I've got to go find it, and I'll probably miss the upcoming exciting news! LOL
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