資料來源:https://www.seeedstudio.com/Arduino-Shield-for-Photon-p-2640.html
Sometimes life can be a little difficult in the land of electronics when two systems talk a different voltage language. How do you make them talk to each other without making one of them burn out?
The Shield Shield is the answer. This shield performs all the necessary voltage translation and provides an Arduino-compatible footprint to make it easier for you to plug in your existing Arduino shields or talk to other 5V hardware.
The shield converts the pin mapping of the Photon to Arduino pin layout and provides a voltage translation of 3.3V to/from 5V.
It use Texas Instruments TXB0108PWR to do the voltage translation in between the Particle's device's 3.3V to a 5V logic. Unlike other IO pins, the analog pins are rated at only a max of 3.3V and NOT 5.0V.
Please remember NOT to exceed this voltage at anytime. The shield has an on-board voltage regulator and can be powered from 7V to 15V DC source. You could also power it via the USB plug on the Particle device alone but the current would be limited to 500mA.
Specification
Operating voltage: 7 to 15V DC
Current consumption: standalone 7mA at 9V DC
Voltage translator with auto direction detect: TXB0108PWR
Dedicated MOSFET based voltage translator on I2C lines
Separate unidirectional quad buffer for driving heavy loads: 74ACT125
Diode protection on ADC pins
Dimensions: 3.4” x 2.1”
Part List
1 x Arduino shield for Photon
Documents
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Dimensions | 140mm x 70mm x 12mm |
Weight | G.W 37g |
Battery | Exclude |
Arduino Shield for Photon | 1 |
有時,當兩個系統談話的不同電壓的語言生活可以在電子地有點困難。你如何讓沒有使他們的一個燒出他們互相交談?
盾盾就是答案。這盾牌完成所有必要的電壓轉換,並提供一個Arduino兼容的足跡,使您更容易在現有Arduino的盾牌插頭或跟其他5V的硬件。
屏蔽轉換光子Arduino的引腳佈局引腳映射,並提供3.3V的電壓平移/從5V。
它採用德州儀器TXB0108PWR做電壓轉換中的粒子的設備之間3.3V至5V邏輯。不像其他的IO引腳,模擬引腳僅3.3V和5.0V不是一個最大額定。
請記住,不要在任何時候超過這個電壓。屏蔽有一個板上穩壓器,可從7V供電至15V的直流電源。您也可以通過USB插頭電源它的粒子設備上單獨但是目前將被限制為500mA。
規範
零件清單
DOCUMENTS