Direct Current Photoelectric Switch 12v 24v 36v 48v Photocell Switch Dc 8v to 50v Dusk to Dawn Photocell Light Sensor for Outdoor Lighting with Automatic Illumination Detection Circuit (2)

I am a person who worked in electronics and electricity for over 40 years. And I was confused by the explanations for the connections of this product. The hookup is simple, once understood. Just forget their main schematic about main power to a DC Power Supply, DC+ to Black and DC- to white - that's plain wrong.CIRCUIT DESCRIPTION:o DC+ power (White wire) is supplied to the photoelectric cell.o DC- (or Ground) (Black wire) is supplied to the relay "Coil" and to the center tap of the SPST(Single-Pole Single-Throw) switch .o Output (Red wire) is an open circuit during the day and supplies DC- at nighto Load is connected between the DC+ power and the Red wire (switched DC-)NOTE: The Load MUST share the same DC+ power as the DC power supply. The Red wire supplies theshared DC- or Ground connection at night.After testing (and ruining the first switch), I am REALLY impressed the operation of this device. During daylight, no measurable power (measured to .00 amps) was used for my solar, timed light and relay circuits. At night, my relay became energized and supplied power to the relay through the relay contacts to the timer board (.09 amps and .13 amps, when triggered by motion detectors). At night, when testing in my garage, the fluorescent lights did not turn the switch off! Wow! I have a very bright garage and the Photoelectric switch ignored the lights completely.I am tempted to give a 4 star rating because of the confusing explanation and wrong wiring diagram. Maybe there is some logic to the international color coding. In my experience, this is a mismatch of US color standards:o AC circuits use "black" as power; "white" as common, center-tap on a transformer; and "Green" forearth ground.NOTE: White is usually tied to earth ground, when using 110AC circuits and is referred to as the"Common"o DC circuits use "Red" as DC+ power, Black as DC- power, and "Green" for earth ground. I believe a DCswitch, such as this, would be better understood in the US by the following color code:1. Red = DC+2. Black = DC-3. Dark Blue or Purple = Switched Ground.Because I probably don't understand coloring international standards for power, I am rating this as a "5 Stars", with the hope that they change the one wiring diagram that is so confusing!P.S. would appreciate a new switch for the one I ruined!

The diagram is wrong - even the one on the switch. The one posted in the comments worked for me - not sure if it was a snip of some original art on the Amazon listing, or the commenter fixed it and posted in their comment. The photocell switches GND, not +12V. White is +, Black is - to the photocell (common) and red goes to the ground side of the load. Positive of the load is connected to +12V. In this configuration, it works. The fact that I was testing with a motion sensor light was making troubleshooting really fun, so I came here :)

this light sensor has 3 wires.. Black, Red and white..I hooked up as follows to a 12 volt battery to a 12 volt light bulb..Black - to + POS on battery.Red - to one of the two wires going to bulb.White - to - NEG on battery and to other wire to bulb..it cooked the switch... what am i doing wrong ???

Switch works great and wired as printed on unit but. It is a NPN sensor as stated on the Switch so it's wired with negative being switched on and off.Keep in mind you have to wait for it to switch on and off give 10 or 15 seconds. They fire at different times some 8 seconds some 12 etc but they do switch

This dusk/dawn photo switch is the most confusing device I have encountered in a long while. Do not make any assumptions based on the color of the wires.The key thing to realize is that the middle (white) wire is a common POSITIVE. Connect this to the battery POSITIVE and also the light bulb POSITIVE.Next, connect the black wire to the battery NEGATIVE. The switch is now supplied with power, via the white (+) and black (-) battery connections.Finally connect the red line to the light bulb NEGATIVE.Yeah, the weird choice of wire colors makes this extremely confusing, but the above wiring works.BTW, it takes about 10 seconds for the switch to change state. Bright light will turn the lamp OFF, and darkness will turn the lamp ON.

I got this item to make some low voltage lights into dusk-dawn lighting. The description says 8-50V, but it worked find for my 3.5V lighting.The connection is a little confusing. Essentially, this item switches the return (or ground) for you power circuit. You'll hook power to your device as usual, and the ground/return is connected to the red lead of this photoswitch.

I've wired quite a bit of photocells before and these absolutely don't do it to work. The schematic is incorrect. But also try the schematics of the comments below and any other way you could think. Absolutely do not work..

Pay attention to what you're doing and thede wil.do the job. I like these switches and will use again