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Photocontrol Insides Here's a pic of the insides of two commonly used types of PCs here, the one on the left is a traditional instant response one that's switches the light using a electromagnetic relay that is held open when it detects light. The one on the right is a newer style electronic control that has a built in time delay and I think uses less energy when the contact is open. I was going to include a pic of a thermal PC too but I kinda misplaced my Caster PC... Keywords: Gear

Photocontrol Insides

Here's a pic of the insides of two commonly used types of PCs here, the one on the left is a traditional instant response one that's switches the light using a electromagnetic relay that is held open when it detects light. The one on the right is a newer style electronic control that has a built in time delay and I think uses less energy when the contact is open. I was going to include a pic of a thermal PC too but I kinda misplaced my Caster PC...

COL_PB146300.JPG PA033348.JPG P1250769.JPG 100_1906.JPG DSCN7346.JPG
File information
Filename:P1250769.JPG
Album name:joe_347V / My Photocontrol Collection
Keywords:Gear
Company and Date Manufactured:Fisher Pierce for Designer's Edge July '98 | Lumatrol / Precision Multiple Controls June '02
Model Number:871E-LR10174 | EC120-AC-TD
Filesize:186 KiB
Date added:Jan 26, 2011
Dimensions:1600 x 1200 pixels
Displayed:204 times
Color Space:sRGB
Contrast:0
DateTime Original:2011:01:25 22:44:17
Exposure Bias:0 EV
Exposure Mode:0
Exposure Program:Program
Exposure Time:1/60 sec
FNumber:f/3.5
Flash:No Flash
Focal length:5 mm
ISO:100
Light Source:Unknown: 0
Make:Olympus Imaging Corp.
Max Aperture:f/3.5
Model:SP600UZ
URL:http://www.galleryoflights.org/mb/gallery/displayimage.php?pid=4845
Favorites:Add to Favorites

Comment 1 to 10 of 10
Page: 1

gailgrove   [Jan 27, 2011 at 06:22 PM]
Interesting, I have opened a few DTL's that I have, they actually have screws on the bottom. I see Jace left his mark on the Lumatrol Rolling Eyes
Laughing
GullWhiz   [Jan 27, 2011 at 07:59 PM]
yes some PCs has screws while others are snap on depending on the brand and model and age

Interesting...The Designer Edge....never seen a PC of that brand and it has cool cursive design too!

I have opened lots of PCs....I have noticed Fisher Pierce PCs from 1993 are slightly different from 1995 ones....
joe_347V   [Jan 27, 2011 at 08:09 PM]
@Niall I think this particular Lumatrol came off the B2255 and is my first electronic PC.

@ Jace I also have a Regent one that looks quite similar to the Designer's edge one.
streetlight98   [Mar 08, 2012 at 11:56 PM]
you said these had an adjustment knob for foot candles. Where is it? Neutral
joe_347V   [Mar 09, 2012 at 12:00 AM]
Well, I guess that it was an adjustment knob for light level and it's the thing on the top left corner of the circuit board that's labeled POT1.
streetlight98   [Mar 09, 2012 at 01:05 AM]
That blue and white plastic thing? Have you adjusted the footcandle setting?
joe_347V   [Mar 09, 2012 at 04:48 PM]
TBH, no but I can try it out tonight. Razz
gmercury2000   [Sep 26, 2016 at 04:35 AM]
Nice, I have a couple Fisher Pierce's that are electromagnetic relay but the eye is actually on a circuit board that uses a 3 second time delay. Pretty cool looking set up.
joe_347V   [Sep 27, 2016 at 08:34 PM]
Interesting, I didn't know FP made a relay PC with a time delay.
gmercury2000   [Sep 27, 2016 at 09:03 PM]
I'll post a pic of the inside.

Comment 1 to 10 of 10
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