Please tell me if you know what this thing is called

悠游自如

Please tell me if you know what this thing is called [Copy link]

 

It is a very thin piece, and its function is similar to that of a solar panel, but it receives infrared light and outputs voltage. Once the infrared light is blocked, the output voltage will become lower. Although the change is very slight, it can still be detected after amplification. I just don't know what it is called and I can't find it.

悠游自如

The picture doesn't seem to be uploaded

qwqwqw2088

According to the function description of the original poster, it should be a kind of infrared sensor.

I've rarely seen packaging like this.

maychang

Youyouziru published on 2022-8-30 14:08 The picture doesn’t seem to have been uploaded

"It functions similarly to a solar panel, but it receives infrared light and outputs voltage. Once the infrared light is blocked, the output voltage will become lower."

From the picture, it looks like a silicon photovoltaic cell.

maychang

Youyouziru published on 2022-8-30 14:08 The picture doesn’t seem to have been uploaded

Some "solar" calculators are powered by silicon photovoltaic cells like this one, and also by a small button battery. The photovoltaic cells are used when there is light, and the internal chemical battery is used when there is no light.

961623540

Silicon Photovoltaic Cell

悠游自如

maychang posted on 2022-8-30 15:15 Some "solar" calculators are powered by such silicon photovoltaic cells and a small button battery. When there is light, the light is used...

Thanks to the big guy, you are knowledgeable. I know it's this thing. This thing can detect infrared light.

maychang

Youyouziru published on 2022-8-30 15:32 Thanks to the big guy, you are knowledgeable. After understanding it, I feel that this is the thing. This thing can detect infrared light by wavelength.

"This thing can detect wavelengths up to infrared light."

This thing is actually not as sensitive as infrared in the visible light range. You can tell if you try it with incandescent and fluorescent lamps.

悠游自如

maychang posted on 2022-8-30 15:42 "This thing can detect wavelengths that can measure infrared light." This thing is not as sensitive as infrared in the visible light range. Try it with incandescent lamps and fluorescent lamps respectively...

OK

bigbat

If it only receives infrared light, it is usually coated with a layer of black to block visible light.

eew_1PrAA0

According to the original poster's description, is it an infrared receiver, the same as the ones used in automatic toilets and mobile phones?

wangerxian

maychang posted on 2022-8-30 15:15 Some "solar" calculators are powered by such silicon photovoltaic cells and a small button battery. When there is light, the light is used...

Is this a product from a long time ago? I have never seen such a battery.

maychang

wangerxian posted on 2022-8-30 17:50 Is it a product from a long time ago? I have never used this kind of battery.

"Is it a product from a long time ago? I have never seen such a battery before."

How long is "a long time ago"? This thing has a history of at least fifty years, and in China it has been forty years. Is this considered "a long time"? It is shorter than the history of transistors and shorter than the history of integrated circuits.

wangerxian

maychang posted on 2022-8-30 18:31 "Is it a product from a long time ago? I have never used this kind of battery before." How long is "a long time ago"? This thing is at least fifty...

I think a history of forty or fifty years is quite a long time.

maychang

wangerxian posted on 2022-8-31 09:12 Forty or fifty years of history, I think it’s a long time.

The transistor has been around for 74 years, and the integrated circuit has been around for 64 years. It's been a long time, but aren't they still in use today?

maychang

wangerxian posted on 2022-8-31 09:12 Forty or fifty years of history, I think it’s a long time.

The arrow points to a silicon photovoltaic cell, which can power this calculator. Such calculators are very common in the market, right?

wangerxian

maychang posted on 2022-8-31 09:24 The arrow points to a silicon photovoltaic cell, which can power this calculator. Such calculators are very common in the market, right?

This is actually a silicon photovoltaic cell, which is very common. I'll take apart a calculator and take a look one day.

chunyang

The photo shows a silicon photocell. As maychang said above, it is used in many cheap calculators and is very cheap. As early as the mid-1980s, I bought photocells packaged as LEDs and infrared phototubes. They were black and more sensitive to infrared. They were like regular photocells with an infrared filter added to them, and they output voltage signals.

乐在其中1100

Similar to the infrared receiving sensors used in televisions, air conditioners, etc.

吾妻思萌

For silicon photonic panels, just add an IFPF coating.