[Alt-photo] Exposure Unit

David Swinnard davesfora at gmail.com
Wed Sep 6 01:39:02 UTC 2017


Interesting.  I wonder how well it’s spectral sensitivity correlates to alt. process sensitivity… will have to check.

Dave


> On Sep 5, 2017, at 5:09 PM, Gordon Holtslander via Alt-photo-process-list <alt-photo-process-list at lists.altphotolist.org> wrote:
> 
> Look at this UV sensor 
> 
> https://www.adafruit.com/product/1918 
> 
> Gord 
> 
> Gordon J. Holtslander 
> gjh at shaw.ca 
> Learn about HSP http://sp-foundation.org 
> 
> 
> From: "alt-photo-process-list at lists.altphotolist.org alt-photo-process-list at lists.altphotolist.org" <alt-photo-process-list at lists.altphotolist.org> 
> To: "Larry Ogrodnek" <ogrodnek at gmail.com>, "alt-photo-process-list at lists.altphotolist.org alt-photo-process-list at lists.altphotolist.org" <alt-photo-process-list at lists.altphotolist.org> 
> Sent: Tuesday, September 5, 2017 8:04:34 AM 
> Subject: Re: [Alt-photo] Exposure Unit 
> 
> Hi Don and Larry. Thanks for the interest. I am using Arduino with the ML8511 sensor and I need to figure out how to code for dose. 
> 
> “Radiant exposure (H), is dose, and is described in joules (unit of energy) per square meter (J m2) or joules per square centimeter (J cm2). Note that a watt is a joule per second thus the dose rate (W cm2) multiplied by the exposure duration (seconds) equals dose (J cm2).” 
> 
> So basically I need to create a timer, then multiply that with the W cm2. 
> 
> I just found out the sensor I am using is no longer available and will have to find a new one. 
> 
> I am using the basic code that was provided with the sensor. 
> 
> Thanks, 
> 
> Greg 
> 
>> On Sep 4, 2017, at 6:18 PM, Larry Ogrodnek <ogrodnek at gmail.com> wrote: 
>> 
>> Hey Greg, that sounds really great! Would love to hear about it when you are ready to share. 
>> 
>> I have some C firmware experience and may be able to help depending on what you need. 
>> 
>> I used to make/sell some LED nametag kits (http://analogmachines.com/p/nametag/) and have some experience in basic/amateur hardware/software work... 
>> 
>> 
>> thanks, 
>> larry 
>> 
>> 
>> 
>>> On Mon, Sep 4, 2017 at 9:49 AM, Greg Brophy via Alt-photo-process-list <alt-photo-process-list at lists.altphotolist.org> wrote: 
>>> I also wanted to order one of the light measure UV meters and was disappointed that it was discontinued. I went on Facebook and some people pointed me in the right direction for creating my own which I am now in the process of doing. I have a prototype I am working on and am just trying to fix a few kinks in the code, but when done I will share how to do it or if people don't want to make it, I can make it as well. I also plan on making a few improvements like touch screens. The best part is that most of the parts are open source and what isn't can easily be printed with a 3-D printer. I will send out updates as I get closer. If anybody know how to program in C++ and wants to help, let me know. 
>>> 
>>> Greg 
>>> _______________________________________________ 
>>> Alt-photo-process-list | altphotolist.org 
>> 
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