What is the difference between SD and SDHC/SDXC cards?

The SD card, SDHC card, and SDXC card differ in the specifications. The SD card supports a maximum of 2GB, the SDHC supports a maximum of 32GB, and the SDXC supports a maximum capacity of 2TB (2048GB). The digital device supporting the SDXC card is compatible with the SD card and SDHC card. If the device only supports SDHC cards, this device cannot use SDXC cards, but is compatible with SD cards. If the device only supports SD card, it is not compatible with SDXC, SDHC card.

SD is an earlier version and is said to have evolved from MMC. Supports up to 2GB SD Memory Cards are small storage media jointly developed by Panasonic, Toshiba, and SanDisk in 1999. At the same time as SD memory cards were introduced, Secure Digital Card Association (SDA) was established at the same time. Formulate relevant regulations and be responsible for the promotion of SD memory cards. After years of development, the SD card has become the world's highest memory card format for electronic products. It is suitable for mobile phones, digital still cameras (DSCs), MP3 music players, personal computers and other electronic products.

SDHC is a large-capacity SD card, that is, SD High Capacity, which supports SDHC, Secure Digital High Capacity, and large-capacity SD at a maximum size of 32GB. That is, an SD of more than 2G is called SDHC because the early SD used a FAT16 file. The system does not support large capacity, and SDHC is upgraded to FAT32 to support large capacity of 2G or more.

SDXC (SD eXtended Capacity) is a new standard released in 2009 last year. It supports the largest 2TB capacity SDXC is an abbreviation for SD eXtended Capacity. It is the newly proposed standard. In addition to the capacity can be upgraded to a maximum of 2T, it can mainly support 300M. The transmission speed of /s, which is to say "High Speed ​​SD" card. However, there are not many digital cameras supporting SDXC cards. Most of them are new products introduced this year, and SDXC is not backward compatible. It does not support ordinary SD and SDHC card slots and card readers.

For most digital cameras and SLRs, the speed of high-speed SDHC memory cards is sufficient for high-speed continuous shooting and high-definition video capture.

1020 nm LED is kind of special IR LED . Because of this is far infrared LED, so that people can't see the color of it, which means people can't see it work or not through naked eyes.

We supply variety of 1020nm IR LED(Infrared LED) products. Including Through-hole 1020nm LED, SMD 1020nm LED and high-power 1020nm LED. We can also produce 1020nm LED according to your requirement.

For the Through-hole Light Emitting Diode 1020nm LED,

We can customize the shape, the lighting angle, the number of emitting source, the flat pin LED and braided LED. Such as: infrared 5mm 1020nm LED with 5 degree, infrared 5mm 1020nm LED with 20 degree, infrared 5mm 1020nm LED with 30 degree, infrared 5mm 1020nm LED with 45 degree, infrared 5mm 1020nm LED with 60 degree, infrared 5mm 1020nm with 90 degree, infrared 5mm 1020nm LED with 120 degree. Infrared 3mm 1020nm LED with 3 degree, infrared 3mm 1020nm LED with 20 degree, infrared 3mm 1020nm LED with 30 degree, infrared 3mm 1020nm LED with 45 degree, infrared 3mm 1020nm LED with 60 degree, infrared 3mm 1020nm with 90 degree, infrared 3mm 1020nm LED with 120 degree ect.

There are many other shapes or color of lens for your choose. Customized infrared LED are available

For the SMD LED 1020nm LED,

We can supply dual-chip infrared LED, three-chip infrared LED, multi-chip infrared LED, high voltage LED, flashing infrared LED and variety of size SMD LED. For instance: 3528 SMD infrared 1020nm LED, 2835 SMD infrared 1020nm LED, 3014 SMD infrared 1020nm LED, 1206 SMD infrared 1020nm LED, 3020 SMD infrared 1020nm LED.
There are also have many other shapes to choose, like the 5050 SMD infrared LED, the 5730 SMD infrared LED ect. You can choose any one of them for your requirement.

1020nm led is a infrared LED(IR LED). Common infrared LEDs are like: 1020nm IR LED, 1000nm IR LED, 1050nm IR LED and so on.

1020nm LED

1020nm LED, 1020nm IR LED, 1020nm Infrared LED, 3W 1020nm LED, 1020nm SMD LED

Shenzhen Best LED Opto-electronic Co.,Ltd , https://www.bestsmd.com