So you can solve Schrödinger's cat riddle. Dewey -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Inge Hernefjord Sent: Wednesday, August 28, 2013 1:10 PM To: [log in to unmask] Subject: Re: [TN] Blowing Smoke When our cat farts, a very smal amount of gas is spread all over the room and remains constant pretty long.. Inge On 28 August 2013 11:21, Stadem, Richard D. <[log in to unmask]>wrote: > Find out how particle counters are calibrated. There must be a > procedure somewhere. Then figure out a way to make it cheaper and easier to use. > > -----Original Message----- > From: TechNet [mailto:[log in to unmask]] On Behalf Of Wayne Thayer > Sent: Wednesday, August 28, 2013 12:09 PM > To: [log in to unmask] > Subject: Re: [TN] Blowing Smoke > > Hi Phil- > > No problem with organics. > > This is a good direction to consider: An electronic cigarette. They > contain the micro-heater to vaporize the propylene glycol. I can > probably make that controlled by the Arduino I'm using, and pulse > width modulate it to adjust how much comes out. I may need an > additional blower of some kind in the system, but that sounds pretty easy. > > I'll let you know what I find out. > > Thanks, > > Wayne > > > -----Original Message----- > From: [log in to unmask] [mailto:[log in to unmask]] > Sent: Wednesday, August 28, 2013 11:25 AM > To: TechNet E-Mail Forum; Wayne Thayer > Subject: RE: [TN] Blowing Smoke > > Heat up propylene glycol, oh wait, you need inorganic particulates, right? > > -----Original Message----- > From: TechNet [mailto:[log in to unmask]] On Behalf Of Wayne Thayer > Sent: Wednesday, August 28, 2013 8:07 AM > To: [log in to unmask] > Subject: [TN] Blowing Smoke > > OK, here's another problem I've been playing with (although it has > little to do with IPC mission, it might be related). > > I am trying to build a system for measuring airborne particulates for > humanitarian organizations looking for inexpensive ways to > measure/monitor indoor air quality. There are cheap sensors available > which might do the job, but they would need periodic re-calibration. > > So I need a controlled, extremely small amount of smoke. At first, I > thought this would be trivial: Find a cheap part at DigiKey and put > too many watts through it. Way too much smoke and too little control. > Then I tried burning thin wires. Too irregular because sometimes they > incinerate completely and other times they find a tiny defect and just > burn that until the wire stops conducting. Then I tried just heating > the wire enough to burn off the insulation. Still too irregular! I > did just a few experiments and got 30% variation. > > Now I'm starting to think maybe a tiny piece of paper on an automotive > cigarette lighter. That's a lot of power to get that glowing, and it > is not convenient to attach to. Any other ideas? > > Wayne > > ______________________________________________________________________ > This email has been scanned by the Symantec Email Security.cloud service. > For more information please contact helpdesk at x2960 or > [log in to unmask] > ________________ > ________________________________ > This message and any attachments are solely for the use of the > addressee and may contain L-3 proprietary information that may also be > defined as USG export controlled technical data. If you are not the > intended recipient, any disclosure, use or distribution of its content > is prohibited. Please notify the sender by reply e-mail and > immediately delete this message and any attachments. > > ______________________________________________________________________ > This email has been scanned by the Symantec Email Security.cloud service. > For more information please contact helpdesk at x2960 or > [log in to unmask] > ________________ > > ______________________________________________________________________ > This email has been scanned by the Symantec Email Security.cloud service. > For more information please contact helpdesk at x2960 or > [log in to unmask] > ______________________________________________________________________ > ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________