圖片來源：MxL7704 PMIC Powers the Raspberry Pi 4 樹莓派目前使用中的供電系統是在 3B+ 開始改用的。供電系統的好壞對樹莓派來說是非常重要，一個運作良好的供電系統可以確保整塊板子的各功能運作正常，一旦供電出問題時，可能對板子所有功能造成各種問題，例如 USB、WiFi 功能失效或不正常，最嚴重的慘況就是讓整塊板子完全停擺變成一塊磚頭。 《供電系統之演進》 樹莓派供電系統的演進可以分成三個階段： 《第一階段是 Pi2 以前的供電》 重點提示：這代整體的供電源頭是來自於 Micro USB 5V，再轉換成 3.3V、2.5V、1.8V等部份供給系統上元件使用。 圖片來源：Introducing the Raspberry Pi Model B+ 接著來看看電路圖了解電源是怎開始的。電源從左側MICRO USB TYPE B這接頭端開始，經過 F3 保險絲再來到 D17 TVS（Transient voltage suppressor）及後端的濾波電容。 這樣的電路設計有什麼優點： 電路設計簡單，價錢便宜。 … Continue reading →
The Raspberry Pi PoE HAT powers a Raspberry Pi 3 Model B+ via an Ethernet cable. Power-sourcing equipment is required on the Ethernet network.
《特色》
The Raspberry Pi Power over Ethernet HAT is a small accessory for the Raspberry Pi computer. It can only be used with the Raspberry Pi 3 Model B+ (launched March 2018). The PoE HAT allows you to power your Raspberry Pi using Power over Ethernet–enabled networks; for this product to be used, the network it is connected to needs to have power-sourcing equipment installed.
Power-sourcing equipment for a 802.3af Power over Ethernet network
Connecting your PoE HAT to the Raspberry Pi
Before installing the PoE HAT, you must attach the supplied spacers in the four corners of the board
Then connect the Raspberry Pi PoE HAT to the two 0.1” headers (40 + 4) that are fitted on the Raspberry Pi
Once the PoE HAT board is connected, you can power the Raspberry Pi through its RJ45 network connector
Disconnecting your PoE HAT
Take care when separating the HAT from the Pi
Pull evenly so that it detaches from all the pins at the same rate; do not pull one end of the connector off before the other
Additional information
No modification to the main Raspberry Pi board is needed for this product to work. Please ensure that your Raspberry Pi’s software is up to date for all functionality to be available. The PoE HAT is fitted with a small fan that is controlled by the Raspberry Pi via I2C. The fan will turn on and off automatically depending on the temperature of the main processor on the Raspberry Pi.
《規格》
The Raspberry Pi PoE HAT is an add-on board for the Raspberry Pi 3 Model B+. It allows the Raspberry Pi to be powered via a power-enabled Ethernet network.
Shall only be powered using 802.3af-compliant power sourcing equipment; any external power supply used with the Raspberry Pi shall comply with relevant regulations and standards applicable in the country of intended use
Should be operated in a well-ventilated environment, and should not be covered
Should be placed on a stable, flat, non-conductive surface while in use, and should not be contacted by conductive items
Instructions for safe use
To avoid malfunction or damage to your Raspberry Pi product, please observe the following advice:
Do not block or obstruct the fan
Do not insert anything into the fan at any time
Do not expose the product to water or moisture, and do not place it on a conductive surface whilst it is in operation
Do not expose it to heat from any source; the product is designed for reliable operation at normal room temperatures
Take care whilst handling to avoid mechanical or electrical damage to the printed circuit board and connectors
Avoid handling the Raspberry Pi while it is connected to a power outlet; only handle by the edges to minimize the risk of electrostatic discharge damage
All other peripherals used with the Raspberry Pi should comply with relevant standards for the country of use and be marked accordingly to ensure that safety and performance requirements are met; these peripherals include, but are not limited to, keyboards, monitors, and mice used in conjunction with the Raspberry Pi
* 注意：本商品不包含 Raspberry Pi 3 Model B+。 $ 840 (單買 PoE HAT)
As one of the smallest systems around there are so many amazing things you could do with the Raspberry Pi if it was self-powered and portable. Introducing PiJuice! A fully uninterruptible power supply that will always keep your Raspberry Pi powered.
Our revolutionary PiAnywhere technology contained in every PiJuice HAT – is the best way to take your Pi off the grid! The real time clock (RTC) on board will let your Pi know what time it is even with no power input or internet connection. Alongside this is an integrated microcontroller (MCU) chip which will manage soft shut down functionality and a true low power deep sleep state and intelligent startup.
You will be able to always keep track of the charge levels and other info with the two built-in tri-coloured RGB LEDs, trigger events and scripts with the three programmable buttons and since the PiJuice will use up to just five of your GPIO pins (just power and I2C), the rest are free to diversify your project. The stacking header allows you to continue to use your existing HATs and add-ons with PiJuice.
《特色》
Onboard 1820 mAh off the shelf Lipo / LiIon battery for ~4 to 6 hours in constant use! (with support for larger Lipo Battery of 5000 or 10,000 mAH+ to last up to 24 hrs +)
A Full Uninterrupted / Uninterruptable Power Supply solution.
Designed for the Raspberry Pi A+, B+, 2B, 3B and 3B+ but also compatible with Raspberry Pi Zero v1.3 and Raspberry Pi Zero Wireless.
Integrated Real Time Clock
Onboard intelligent on/off switch
Low power deep-sleep state with wake on interrupt/calendar event
Programmable multi-colored RGB led (x2) and buttons (x3) with super simple user-configurable options
Hardware watchdog timer to keep your Raspberry Pi on and working in mission-critical remote applications
Our revolutionary PiAnywhere technology ? the best way to take your Pi off the grid!
Full power management API available to Raspberry Pi OS with auto shutdown capability when running low on batteries
Raspberry Pi HAT compatible layout, with onboard EEPROM for easy plug and play operation
Low profile design to fit inside lots of existing Raspberry Pi cases!
Enhanced graphical user interface (GUI) available for easy install (via APT)
Customisable scripts for enhanced flexibility and full report of battery status
All GPIOs available via stackable header for ease of expandability and connectivity
Charge via on-board micro USB or via the Raspberry Pi micro USB (or from onboard pin headers)
Batteries can be charged from different type of sources and voltages
Replace the battery without downtime. Compatible with any single cell LiPo or LiIon battery
Fully CE and FCC tested design. Battery safety tested also.
《規格》
The EEPROM can be disabled and its I2C address changed for increased compatibility with other boards
BP7X battery – original battery from Motorola Droid 2 (A955) – 1820mAh battery
Microcontroller is an ST Micro STM32F030CCT6 ARM Cortex-M0, 48MHz, F64KB, R8KB, I2C, SPI, USART, 2.4-3.6V
Charge IC – BQ24160RGET Charger IC Lithium-Ion/Polymer, 2.5A, 4.2-10V
Optional spring pin – Mil-Max 0929-7-15-20-77-14-11-0
Compatible with any 4 pin battery on board that can be used with 00-9155-004-742-006 battery contacts from AVX including the BP7X, BP6X, and any compatible batteries including the 1600mAh and 2300mAh
ones from CameronSino (CS-MOA853SL and CS-MOA855XL)
There is an on board 4 pin screw terminal block for larger off board batteries. Any single cell LiPo / LiIon is compatible. However, you use your own sourced battery at your own risk. We HIGHLY RECOMMEND using
a battery with an internal protection circuit and a NTC (temp sensor)
Optional header for offboard button – connected to same output as SW1
6 pin breakout header – with two GPIO from the ARM Cortex-M0, Vsys, 5v0, 3v3, GND connections
Header for optional off board solar panel / wind turbine etc.
Optional RF Shield attachment – Harwin S02-20150300 (can also double as an inexpensive heatsink)
Input voltage range – 4.2V 10V
Output voltage – 3.3V and 5V
Output amperage – maximum current at 5V gpio is 2.5A and at VSYS output 2.1A, but also this depends heavily on battery capacity. For BP7X have measured around 1.1A at 5V GPIO and around 1.6A at VSYS
output. Obviously, this also depends heavily on the current draw demanded by the Raspberry Pi/device itself. To achieve a maximum of 2.5A it will need battery over 3500mAh.
Boxed weight – 96g
Boxed dimensions – 12.2 x 10.8 x 3.5 cm
Unboxed weight – 57g
Unboxed dimensions – 6.5 x 5.6 x 2 cm
PiJuice HAT box contains
1 x PiJuice HAT
1 x Battery and battery surround
1 x PiJuice guide
4 x Mounting posts attached to PiJuice
8 x Mounting screws (4 are already assembled to the board)
The Raspberry Pi is a wonderful little computer, but one thing it isn’t very good at is controlling DC Servo Motors – these motors need very specific and repetitive timing pulses to set the position. Instead of asking the Pi Linux kernel to send these signals, pop on this handy HAT! It adds the capability to control 16 Servos with perfect timing. It can also do PWM up to 1.6 KHz with 12 bit precision, all completely free-running.
《規格》
– Raspberry Pi Model A+, B+, or Pi 2 適用
– Servo HAT x1
– 2-pin terminal block x1
– 3×4 headers x4
– 2×20 socket header x1
Let your robotic dreams come true with the new DC+Stepper Motor HAT from Adafruit. This Raspberry Pi add-on is perfect for any motion project as it can drive up to 4 DC or 2 Stepper motors with full PWM speed control.
《規格》
– 65mm x 56mm x 13mm / 2.6″ x 2.2″ x 0.5″
– Raspberry Pi Model A+, B+, Pi 2, Pi 3, Pi 3 Model B+皆適用
– Servo HAT x1
– 2-pin terminal block x3
– 3-pin terminal block x2
– 2×20 socket header x1
《特色》
* 具有2.8″ 顯示屏、320×240 解析度＠16-bit per pixel
* 電容式觸控螢幕，使用更靈敏
* 適用於 Raspberry Pi 3 / Pi 2 / B+ / Model A+ / Zero / Zero W 等，含 2×20 腳位的任何 Pi
* 另有拉出所有40Pin GPIO 腳位，可供使用
* 使用I2C pins(SDA & SCL)、SPI pins(SCK, MOSI, MISO, CE0) 和 GPIO #25、#24，其餘 GPIO 未使用
《規格》
* 本套件的腳位連接埠已經焊接好，不需再自行焊接
* 本套件包含觸控螢幕面板與底板，不包含其他組件
* 螢幕尺寸：50mm x 69mm x 4mm / 2″ x 2.7″ x 0.16″
* PCB尺寸：56mm x 85mm x 11mm / 2.2″ x 3.3″ x 0.4″
* 重量：47g
