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LED Refrigerator Light

Electronics / LEDs / Homemade homemade

Added 9 comments

We got an old Biryusa-17 refrigerator. He was many years old ...

The bimetallic thermal switch worked poorly for him (almost did not work). He disconnected and threw it away, and in return set the thermostat according to the hardloca scheme. And there was a light switch (~ 220 V) open type on an incandescent bulb (oh, horror!) 220V.

All this was removed (and the place inside was freed). Instead, a 12V LED strip (15 LEDs) was installed (glued). And the contactless switch on the reed switch. The magnet is glued on the door from above, and the reed switch with the control circuit in the visor of the refrigerator.

Power supply (12 V) is taken from the thermostat circuit source. If there is no thermostat, you can put a separate source at the bottom of the refrigerator next to a ~ 220 V junction box. The electrical circuit diagram of the device is shown below.

Materials and tools:
Details for the manufacture are shown in the photo (3)
Magnet D = 10mm (used in boxes from cellular and TP)
3 resistors 0.125 W (ratings are shown in the diagram)
Transistor 2SC1627A
Transistor 2SC945
LED strip (15 LEDs soldered in 5 groups of 3 LEDs) for a voltage of 12 V
330 pF capacitor
Reed switch (20mm)
Insulated wire (~ 2m if two-core)
Universal scarf
Reed soldering scarf (textolite 38x12 mm)
Power Supply 12 V (300 mA)

Soldering iron
Rosin, solder (POS61)
Side cutters
Tweezers
Drill with a drill (optional)
Clay Moment (a bit at all)

Top mounting view

The control scarf is recessed into the cardboard insulation

Type of mounting a reed switch on a textolite scarf. The scarf is glued to the refrigerator case (duralumin corner in this case). On the glue moment.

View with an open door during the day ...

And the view with the door open at night

Added 9 comments

9 comments

April 21, 2016 17:26 Author 0

Reply To quote A complaint

Why do you immediately look at expensive models?

Duck is not in the matter of purchase ... but in the matter of technical solutions.

About the color temperature at the backlight of the refrigerator as if not really needed. Do not read in the fridge !! : winked:
But in the table lamp, I agree. I like tokma luminescent. For small, precise work. And all sorts of incandescent, halogen, LEDs are all wrong, Imho.

April 21, 2016 17:07 0

Reply To quote A complaint

But I wouldn’t want to use diode light ... It’s kind of cold, not pleasant.

I bought the first batch of diode bulbs seven years ago. Then they just appeared and were expensive. And I didn’t figure out what to take “warm white” ... I bought 20 pcs, screwed 10 into the corridor, 10 into the kitchen. Well, such already scary light - like from luminescent in shops and hospitals)))) ..... I suffered three days, .. and then I unscrewed it and use them in the basement, in garages, etc. ... Because, rarely burn out, there is still a lot to eat ... But I scored “warm” only home.
I understand that you are for security reasons. And here the point is not that, as the respected Delausyus used to say, "whoever made this refrigerator is not a tooth-nude in TU and PTB," but that the refrigerator needs to be changed a long time ago! I’ve made a compressor from a newer, two-chamber with a large freezer below a couple of years ago.)))). And such, I thought, does not happen already ...

Why do you immediately look at expensive models? I recently helped to buy a simple "Indesit" kumu ... Large, two-chamber, quiet and ... cheap - about $ 400. So, is it worth it to wind up junk?
Our Minsk “Atlanta” is also not bad enough. (I used it for 21 years. I dismantled it. And only because I broke the handle on the door .... I looked .. Old, the plastic turned yellow. The design is again ... I waved my hand and took it apart. And the case I took to my brother village - in it, laying "on the back", it is convenient to store grain. Mice can not get there. And then there are two compartments.))))))

April 21, 2016 17:01 0

Reply To quote A complaint

: wink: What is the matter with you, are you healthy? What are you stupidly repeating the same thing
"You do not know PTB." where did you draw such conclusions?

April 21, 2016 16:52 Author -1

Reply To quote A complaint

... Where have I violated PTB?

You do not know PTB. I had to give a technical opinion on an industrial accident. We used in the new device a power supply (simplified) from the radio la ...
And according to the reed switch, for example, MKA10110 current <20mA, voltage <30V The load is only active

And .. so who did this refrigerator, not a tooth-naked in TU and PTB?

And yes. But inexpensively and what they managed. There was even a shortage. And it was believed that you would use a HOUSEHOLD refrigerator on an insulated floor (wood, linoleum), without any water there: winked: not near a sink with running water, etc.

April 21, 2016 16:05 +1

Reply To quote A complaint

: winked: They wrote a lot and not in a topic. Especially roofing felts - roofing felts, potatoli. Do you even understand what you are discussing? The same reed switches (.) Again abstract conclusions (and they are different). And so again the question: - Where did I violate the PTB?
And .. so who did this refrigerator, not a tooth-naked in TU and PTB?

April 21, 2016 15:38 Author 0

Reply To quote A complaint

With the same success, the reed switch could be installed instead of the standard switch.

I found in the internet a photo of the opened Biryusa-17. There is this healthy halabuda-light switch 220V with a bulb
and with a motor thermal switch ~ 220V and a protruding bent tube, the thermal switch circled in red!
There, drops flow down the wet wall, the Zhinka wipes with a (wet already) rag ...
And in the hole where the wires ~ 220V go outside, ice forms, it also cleans it with a knife (iron, conductive)
Previously, I turned off ~ 220V from the mains for defrosting and cleaning. But it didn’t always work out ....
In the bourgeois off on the Hall sensor, there is light on all shelves (protected) and automation.
But, and the price is from 60 thousand rubles, maybe the level is different.
And the incandescent bulb in Biryus-17 stood either 15, or 25 watts !! with a bare base!
There was no light at night and the refrigerator started to flow ... In the morning they gave light. Here is a violation of the PTB. I’m telling Zhinka - don’t approach the old stuff ...
I climb, disconnect from the outlet and then wipe and wipe ...
And after modernization inside the refrigerator, now there are no bare sockets and TP switches and wires ~ 220V
And the lighting is nice :)

April 21, 2016 15:01 0

Reply To quote A complaint

In which one am I not in the subject and where is PTB violated by me? Explain, please. : winked:

April 21, 2016 10:17 Author -1

Reply To quote A complaint

when you can turn on the reed switch directly

You just are not in the subject. Reed switch (2cm) is designed for low current and low voltage ... Everything must be done according to the technical specifications (albeit home-made or something else in the electrics ...) And in this case also know PTB

April 21, 2016 08:30 +2

Reply To quote A complaint

: winked: It seems like an interesting idea (AH!), but it’s done (SWAW ?!)
With the same success, the reed switch could be installed instead of the standard switch.
A LED strip on all the shelves. And so nothing special has changed, either with a 220v bulb (why did it scare you so much) or with a tape. More economical? I don’t think so. For the reason that light bulbs for such "things" are no more than 7 watts. And so you make (assemble) the circuit, it is not clear why, when you can turn on the reed switch directly, and even the adapter unit for 12 volts. Sheepskin dressing is not worth it.

LED Refrigerator Light

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