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1  Topics / Device Hacking / Hacking a String Pot / Smart String on: April 30, 2013, 04:03:23 am
Hi Everyone,

I was looking for advice on hacking the following.

http://www.ebay.com.au/itm/290647014507?nma=true&si=FJPbdHKPQgZifHuHZFLeESH4Xvk%3D&rt=nc&_trksid=p4340.l2557&orig_cvip=true#ht_1387wt_1163

It's basically a string pot and calculator display.  Is there a way to hack the output to the screen to grab the numbers?  i.e. Processed and not directly from the encoder/potentiometer? If so do you know of anyone that's done this before with other devices? 

I've not got it yet to try but I've had a look and not found anything.

Thanks in advance.
2  Using Arduino / Project Guidance / Making a servo idle on: March 23, 2012, 09:12:12 am
Hi,

This is a general question about servo's - I hope no one minds me asking it here!

Is there a way to make the servo idle in a particular position?

If I move it to a position and then set the pulse to 0 or off it is slow to respond when I then send it a pwm position.  It's really to stop it drawing current and making a noise while holding it's position.

Do servo's have a specific PWM for idle?  If so I can't find any info on data sheets.

Thanks in advance for any info.
3  Using Arduino / Project Guidance / Re: Locating People in 360 on: January 24, 2012, 08:21:11 am
Thanks for the suggestions - I love this forum!

It doesn't have to be people or mammal's only, anything that moves in the vicinity of a particular direction.  I'll look into the linear photo diode array. 

It's a little lazy but I'm willing to compromise on accuracy for a quick and relatively easy solution - it's for a quick camera prototype to go in a public space - I want to create the effect of a camera looking at people - so precision is not so necessary.

I'd be keen to know how you detect moving edges with the IR - if your willing to share?  I'd rather not have a PC but again, I'm willing to compromise.

 smiley
4  Using Arduino / Project Guidance / Locating People in 360 on: January 23, 2012, 08:31:44 am
Hi Everyone,

I was trying to detect motion but also locate it's direction around 360.  So for example, know if there is movement at 260 degrees or 100 degrees, however, it does not have to be super accurate.

My initial attempts were to use an ultrasonic ranger that turns on a servo, with an initialisation stage that works out values for the distance of objects in the room. 

This never worked so well and so I'm thinking about a series of fixed PIR sensors that have a narrow range.

Firstly I wondered wither there is a sensor off the shelf that serves this purpose?  And secondly, has anyone attempted to do anything similar.

Thanks and I do hope this makes sense.
5  Forum 2005-2010 (read only) / Syntax & Programs / Help - a challenge for a newbie on: July 16, 2009, 10:47:34 am
Hi,

I am trying to record the sequence in which a switch is pressed over a second or so, then play this back in a loop.

So from when the switched is first pressed it will store variables like this, "1001111000011111000011111" depending on how it is pressed.

Then I can replay these stored variables to an LED afterwards and it will blink in the sequence in which the switch was pressed.

Does this make sense and is it possible.  I have been trying with an array of variables, to store the state of the switch but am having no luck because I am used to basic and still getting used to Arduino.

Does anyone have any suggestions of a simple solution?  Or has anyone done something similar.

Thanks.
6  Forum 2005-2010 (read only) / Troubleshooting / Trying to get piezo knock to work on: November 29, 2010, 10:33:53 am
Hi,

I have set up the piezo knock sensor using a small un-housed piezo.  I have used two 520k resitors in series as a 1M resistor.  This is connected in parallel to the piezo that is connected to the analogue pin 3 of an arduino mini and earth.  I suspect it is just not sensitive enough but picks up no knock what so ever.  It acts as a pretty good touch sensor though.

Any ideas on how I could get this to work?  I can upload a photo if needed.

Thanks for listening.
7  Forum 2005-2010 (read only) / Troubleshooting / Re: Arduino Mini 04 not uploading on: November 02, 2010, 06:06:56 am
Thank you very much, it is now working.  I was convinced it was something more complicated. smiley smiley
8  Forum 2005-2010 (read only) / Troubleshooting / Arduino Mini 04 not uploading on: November 01, 2010, 04:48:03 pm
Hi,

I hope someone can help a newby.  I have a mini 04 and am not able to get it to upload sketches.  I am using a USB to serial TLL Cable (OEM FTDI) and both drivers were automatically installed.  I have checked the serial port and selected the correct one.  I have selected arduino mini.  I have added a reset switch and tried pressing it at different intervals.  I have attached an LED and it flashes twice when reset, it also flashes again after about 10-15 seconds (not sure why).  This is a new chip I have never uploaded to it though have succesfully used a diecimilia recently with no bother.  I have taken a photo of my circuit, I hope this helps.

If I have missed anything please let me know.

I have put a photo here:

http://picasaweb.google.com/Tommydykes/ArduinoTrouble#5534700456229972658

Thanks everyone for your help.
9  Forum 2005-2010 (read only) / Frequently-Asked Questions / DIP Socket or Holder for Mini 04 on: November 02, 2010, 08:00:10 am
Hi,

I was looking for a DIP socket or something that will hold my arduino mini 04 so I can move it around different boards.  I have had a look but can't see anything suitable.  What does everyone else use?

Thanks.
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