截至 2020 年底,Raspberry Pi 已經銷售了三千七百萬台,並且被廣泛應用在個人創客、學校教學或是量產品上。但如果是想做單純 I/O 功能的應用,就需要考慮使用樹莓派的限制了。因為 Raspberry Pi 的功耗至少是 100 毫瓦(milliwatts)起跳,而且 Raspberry Pi(包括 Zero 系列)都沒有支援類比輸入,而使用 Linux 作業系統更不適合低延遲的場景。
3. 主動散熱,可將熱氣從 USB 和 Ethernet 空隙中帶走。
Raspberry Pi 4 Case Fan 採用下吹式的主動散熱方式,配合紅白外殼的機構,可有效的將熱氣從 USB 和 Ethernet 處抽走,達到絕佳的冷卻效果。
圖片來源:Designing the Raspberry Pi Case Fan
2019-06-20:
* Based on Debian Buster
* Support for Raspberry Pi 4 hardware
* FKMS OpenGL desktop graphics driver and xcompmgr compositing window manager used when running on Raspberry Pi 4
* Screen Configuration application added for use with FKMS driver
* Raspberry Pi 4 video output options added to Raspberry Pi Configuration
* Uses new PiXflat UI theme for GTK and Openbox
* CPU activity gauge plugin no longer shown on taskbar by default
* CPU temperature gauge plugin added (not shown by default)
* USB ejecter and Bluetooth taskbar icons hidden when not appropriate
* Version 74.0.3729.157 of Chromium web browser included
* Version 32.0.0.207 of Flash player included
* IDLE Python IDE removed
* Wolfram Mathematica removed temporarily due to incompatibility with Buster
* Display of package sizes removed from Recommended Software
* Appearance Settings modified to support independent settings for two monitors
* Oracle Java 7 and 8 replaced with OpenJDK 11
* Miscellaneous small bug fixes
* On-board 5GHz WiFi blocked by rfkill by default
The block is removed when taking one of the following actions:
- Selecting a locale in the first run wizard
- Setting the WiFi country in the Raspberry Pi Configuration tool or the Network Settings applet
- Setting the WiFi country in raspi-config
- Providing a wpa_supplicant.conf file through the boot partition
- Running 'rfkill unblock wifi'
* Boot partition size set to 256M
* Linux kernel 4.19.50
* Raspberry Pi firmware 88ca9081f5e51cdedd16d5dbc85ed12a25123201
技術規格如下:
• 700MHz Broadcom BCM2835 CPU with 512MB RAM
• 40pin extended GPIO
• 4 x USB 2 ports
• 4 pole Stereo output and Composite video port
• Full size HDMI
• CSI camera port for connecting the Raspberry Pi camera
• DSI display port for connecting the Raspberry Pi touch screen display
• Micro SD port for loading your operating system and storing data
• Micro USB power source