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31  Topics / Product Design / Re: Strange resistor names in Eagle on: July 29, 2013, 08:29:31 am
Starting to learn KiCad.
The clearest (step by step tutorial) I`ve found is here
http://store.curiousinventor.com/guides/kicad/

If you are thinking of selling your circuit boards in the future and don`t want to spend money on software, use Kicad.
Warning long video! Part1 45m, part 2 over an hour!


I also watched this

and was quite impressed.

Diptrace also has a free version (not for profit) version, no size limit but 300 pin limit.

32  Community / Exhibition / Gallery / Re: Amiga MOD Player on Arduino Uno on: July 22, 2013, 04:57:16 am
Portable Amiga Mod Player! smiley-grin

I still have a collection of my fav amiga mods stored away in the depths of this hard drive somewhere. smiley
33  Topics / Product Design / Re: Arduino Dial Up Modem shield on: July 14, 2013, 04:54:20 am
Arduino Answering Machine/Caller ID - Cold caller blocker, take my money already. smiley-grin
34  General Category / General Discussion / Re: Large 7 Segment LCD Display? on: July 07, 2013, 05:21:47 pm
Yes, that's the total width of the display, each number is about 20mm high.
35  General Category / General Discussion / Large 7 Segment LCD Display? on: July 07, 2013, 02:44:10 pm
Like this? (6" Display)
http://www.ainslie.org.uk/callerid/pics/boxes/bt_cd-2k.gif
The photo does not do it justice, it's a nice large display.

I guess its possible using custom characters on a "normal" 4 line display?
36  Using Arduino / General Electronics / Re: Most common (single rail) Op-Amp used with Arduino? on: July 02, 2013, 05:10:45 pm
Thanks for the replies.

I'm looking at this circuit (my application has nothing to do with doors though) smiley
http://www.npeducations.com/2013/01/laser-light-based-door-opener.html
The op amp in this case is used as comparator, I could probably do away with this and feed the output of the transistor to the arduino and do the same in software?
37  Using Arduino / General Electronics / Most common (single rail) Op-Amp used with Arduino? on: July 02, 2013, 03:26:12 am
LM324, LM358, other?

It will be for a photodiode amp circuit.

Thanks.

38  Community / Gigs and Collaborations / Re: Looking for work! on: June 15, 2013, 02:07:24 pm
Is not the MakerBot platform arduino based?, I think they made quite a bit of money out of that.
39  Development / Other Hardware Development / Re: mowayduino on: June 15, 2013, 02:04:41 pm
Very nice clean design.
40  Using Arduino / Sensors / Re: MSI Barcode Wand Connections? on: June 15, 2013, 03:55:13 am
I did some measurements on the connections using the meter Diode function.

Diode Test on Meter
Red +  White -   1316
Red -   White +   574
-------------------------
Red +    Black - 1326
Red -    Black + 1360
-------------------------
Red +    Shield - 1315
Red -    Shield +  575
-------------------------
Black - White + 1579
Black + White - 1938
-------------------------
Black - Shield + 1579
Black + Shield + 1938
-------------------------
White + Shield -  001
White - Shield +  001

Blue wire has no connection and is OC.

I would have expected Red and Black to be power, with the white wire to be (TTL) output.
But it appears from the above connections that white is connected to shield, which makes no sense to me.

Comments please.
41  Community / Gigs and Collaborations / Re: Ideas/examples for school project on: June 06, 2013, 02:18:34 pm
Yup, a big cardboard pointer stuck to a (decent size) servo, and you could make a big analogue style meter showing the wattage.
42  Using Arduino / Storage / Re: Compact Flash Interface? on: June 03, 2013, 02:44:26 am
Thanks!
43  Using Arduino / Project Guidance / Re: LED Control based on Windows System Values on: May 28, 2013, 03:27:33 am
http://www.autoitscript.com/forum/topic/131052-sysinfolog-v209/?hl=%2Btemperature#entry915106

http://www.autoitscript.com/forum/topic/90736-performance-counters-in-windows-measure-process-cpu-network-disk-usage/?hl=%20cpu%20%20id

http://www.autoitscript.com/forum/topic/130371-automate-qt-and-qwidgets/?hl=%2Bqt#entry1059968

http://www.autoitscript.com/forum/topic/89542-tesseract-screen-ocr-udf/

Or try another utility like the first one here
http://www.mydigitallife.info/check-and-monitor-computer-cpu-and-gpu-temperature-voltage-or-fan-speed/
see if Autoit will read the text from that.



44  Using Arduino / Storage / Compact Flash Interface? on: May 27, 2013, 02:43:14 pm
I have quite a few Compact Flash devices here, memory wi-fi cards etc

The breakout board sold by Sparkfun
https://www.sparkfun.com/products/195
has been retired, is there an alternative to this, and are there libraries to work with compact flash style devices like these?

Thanks.
45  Using Arduino / Project Guidance / Re: LED Control based on Windows System Values on: May 27, 2013, 10:59:48 am
I would use Autoit
http://www.autoitscript.com/forum/
as it can "read" the text values from most windows programs such as SpeedFan for temps, cpu load and voltages.

Autoit can also monitor the running processes or if a particular program (window/taskbar icon) is running.
There is a comms library for autoit that can send this data to the arduino for processing.

Detecting a computer crash - write a loop in your autoit program/script to send a serial byte in addition to the other values, when this stops being sent you know something is wrong (I would have a sounder here instead of an LED.

This all do-able, but take it step by step.

Get used to using autoit and reading values from a program (Speedfan or other) window first.
Then write an Autoit program/scipt sending data using the Autoit Comms lib to test sending serial data to the arduino, something simple like a control byte to turn an LED on/OFF.

Once you have those working, you can work on the complete program sending monitored data to be processed by the arduino.

Search the Autoit forum for Arduino projects by others and if you get stuck ask, someone will help you out!. smiley
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