PCA9685簡介

PCA9685簡介

The PCA9685 is an I2C-bus controlled 16-channel LED controller optimized for LCD Red/Green/Blue/Amber (RGBA) color backlighting applications. Each LED output has its own 12-bit resolution (4096 steps) fixed frequency individual PWM controller that operates at a programmable frequency from a typical of 40 Hz to 1000 Hz with a duty cycle that is adjustable from 0 % to 100 % to allow the LED to be set to a specific brightness value. All outputs are set to the same PWM frequency.

PCA9685 also has a built-in oscillator for the PWM control. However, the frequency used for PWM control in the PCA9685 is adjustable from about 40 Hz to 1000 Hz as compared to the typical 97.6 kHz frequency of the PCA9635. This allows the use of PCA9685 with external power supply controllers. All bits are set at the same frequency. The PCA9685 has 4096 steps (12-bit PWM)

如何調整樹莓派官方版7吋觸控螢幕亮度

如何調整樹莓派官方版7吋觸控螢幕亮度

是否覺得樹莓派的觸控螢幕太亮了呢?
想要調整亮度卻找不到按鈕呢?
其實驅動程式就有提供 /sys/ 界面,讓使用者可以透由指令啟動或關閉螢幕,也可以調整螢幕亮度喔,詳細內容如下:
  1. 啟動螢幕:

    echo 0 > /sys/class/backlight/rpi_backlight/bl_power

  2. 關閉螢幕:

    echo 1 > /sys/class/backlight/rpi_backlight/bl_power

  3. 調整亮度:

    echo n > /sys/class/backlight/rpi_backlight/brightness
    這裡的n是 0 到 255的任一值

  4. 若出現 “Permission denied” 錯誤訊息,請在最前面加上 sudo bash -c 及” “,如:

    sudo bash -c "echo 0 > /sys/class/backlight/rpi_backlight/bl_power"

  5. 備註:’brightness’ 設定只對 v1.1版硬體有效,v1.0版 < 128 是關,>= 128 是開

樹莓派 Raspberry Pi GPIO 排針輸出腳位互動式教學

樹莓派 Raspberry Pi GPIO 排針輸出腳位互動式教學

The comprehensive GPIO Pinout guide for the Raspberry Pi.

This GPIO Pinout is designed to be both a quick and interactive reference to the Raspberry Pi GPIO pins, plus a comprehensive guide to your Raspberry Pi’s GPIO interfaces. It also includes dozens of pinouts for Raspberry Pi add-on boards, HATs and pHATs.

Support Pinout.xyz On Patreon

If you love Pinout, please help me fund new features and improvements. Head on over to Patreon.com/gadgetoid. A $1 pledge will make all the difference! Thank you.

pHAT Stack

Pinout has teamed up with Pimoroni to create a prototype board compatibility tool, check it out here!

Explore HATs & pHATs

We’ve added a board explorer! Use it to find the pinout for a Raspberry Pi add-on board, or discover new ones. If you manufacture boards, we’d love to add yours too. You can contribute over on GitHub.

What do these numbers mean?

  • BCM – Broadcom pin number, commonly called “GPIO”, these are the ones you probably want to use with RPi.GPIO and GPIO Zero
  • WiringPi – Wiring Pi pin number (shown as a tooltip), for Gordon Henderson’s Wiring Pi library
  • Physical – Number corresponding to the pin’s physical location on the header
  • Rev 1 Pi – Alternate BCM numbers for the original, 26-pin model “A” and “B” Pi

Source comes from https://pinout.xyz/#

Pridopia Learning Board Pi_Scratch software example demo

Click here to Read More

樹莓派及Arduino最常見各式感測器簡介與軟硬體相關教學資源免費下載

樹莓派及Arduino最常見各式感測器簡介與軟硬體相關教學資源免費下載

樹莓派各型主機板詳細規格比較表

樹莓派各型主機板詳細規格比較表

Model A

The Raspberry Pi Model A is a cut down version of the Model B, featuring a smaller form factor and only one USB port. The Model A’s do not include ethernet, and are designed to be lower cost, lower power consumption alternative to the Model B.

Model B

The Raspberry Pi Model B is the flagship Raspberry Pi Model, with the fastest CPU and most connectivity features. The latest revision (Raspberry Pi 3 – Model B) features a 1.2GHz Quad Core processor, and on board WiFi & Bluetooth. The Model B is the largest Pi available with the approximate size of a credit card.

Compute

The Compute Module features a 200 Pin DDR2-SODIMM layout, and is designed for engineers who need Raspberry Pi functionality but need a smaller form factor for embedded designs.

Zero

The Raspberry Pi Zero is an ultra low cost and ultra small variant of the Raspberry Pi. It comes with an unpopulated GPIO header, and only a single micro USB port for connectivity. The Raspberry Pi Zero W (Wireless) includes on board WiFi and Bluetooth.

新產品發表囉! 樹莓派13.3吋 1920×1080 HDMI LCD (H)電容式觸控螢幕

樹莓派13.3吋 1920×1080 HDMI LCD (H)電容式觸控螢幕

  1. 13.3吋IPS高階面板,1920×1080超清解析度
  2. 鋼化玻璃電容觸控面板,硬度達6H
  3. 支援Raspberry Pi、BB Black等主流mini PC
  4. 配合Raspberry Pi使用時,支援Raspbian、Ubuntu、WIN10 IOT 等作業系統,單點觸控,免安裝驅動程式
  5. 當作電腦螢幕使用時,支援Windows 10 / 8.1 / 8 / 7,10觸控,免安裝驅動程式
  6. 雙HDMI埠(單鍵切換無需插拔)
  7. 支援多國語言OSD目錄
  8. 可透過紅外線遙控器操作
  9. 附3.5mm連接埠,支援HDMI音響輸出
  10. 内置黑磁高傳真喇叭(無需外接音箱)
  11. 支援VGA輸入(需另購VGA轉接線)
  12. 支援壁掛,背面有75×75mm的壁掛固定孔(M4螺絲孔)
  13. 附75°傾斜角度支架

新產品發表囉! 樹莓派 10.1吋 1280×800 HDMI LCD (D)電容式觸控螢幕

樹莓派 10.1吋 1280×800 HDMI LCD (D)電容式觸控螢幕

  1. 10.1吋IPS高階面板,1280×800超清解析度
  2. 鋼化玻璃電容觸控面板,硬度達6H
  3. 支援Raspberry Pi、BB Black等主流mini PC
  4. 配合Raspberry Pi使用時,支援Raspbian、Ubuntu、WIN10 IOT 等作業系統,單點觸控,免安裝驅動程式
  5. 當作電腦螢幕使用時,支援Windows 10 / 8.1 / 8 / 7,10觸控,免安裝驅動程式
  6. 雙HDMI埠(單鍵切換無需插拔)
  7. 支援多國語言OSD目錄
  8. 可透過紅外線遙控器操作
  9. 附3.5mm連接埠,支援HDMI音響輸出
  10. 内置黑磁高傳真喇叭(無需外接音箱)
  11. 支援VGA輸入(需另購VGA轉接線)
  12. 支援壁掛,背面有100×100mm的壁掛固定孔(M4螺絲孔)
  13. 附45°傾斜角度支架

新產品發表囉! 樹莓派乙太埠擴充板(含Pi ZeroW, 遊戲盒套件)

1. 3D print Zero-W top cover
2. 3D print Zero-W base
3. 0.96″128×64 white OLED screen
4. Keypad double x2
5. Button Shaft
6. Keypad single
7. Pi-Zero-W-Net HAT board
8. 11mm spacer x2
9. M2.5 x6mm screw x6
10. M2.5 x10mm screw x2
11. Pi Zero W
12. 16Gb Micro SD card
13. Mini HDMI to HDMi adapter
14. micro USB OTG cable

最新版樹莓派筆電Pi-Top V2-Green上市囉~

最新版樹莓派筆電Pi-Top V2–Green

  • User assembly Screw in Raspberry Pi
  • Slide hub
  • Clip on GPIO Bridge
  • Screw in GPIO Bridge Lock Screw
  • Chassis Product Dimensions: 345x220x40mm
  • Product Weight: 1.5kg tbc
  • Colour: Green with grey bezel
  • External ports:2x USB 2.0
  • 1x 10/100 Fast Ethernet
  • 1x Audio Jack (stereo)
  • Keyboard and trackpad105mm Sliding keyboard for internal access (US layout)
  • Keyboard:296x105mm (Full Size)
  • 16x16mm keys
  • 3.2mm Spacing
  • Trackpad:104x75mm
  • Gesture Control
  • Left and Right click
  • Modular Rail Magnetic Rails for pi-top Accessories
  • Internal USB 2.0 Port (for USB stick, internal hard drive etc)
  • Integrated CPU passive custom Cooling Bridge
  • No SPI used internally (meaning it is free for use with other HATs)
  • Includes SD Card Removal Tool
  • Display14” 1920×1080 FHD LCD screen
  • 180° Lid Opening
  • Battery6-8 hours battery life
  • 38.85 Watt-hour
  • 11.1V
  • Peripherals
    Charger:18V, 2.5A
    1.7x4mm Plug (This is not the same as pi-top)
    AU, EU, UK or US AC cable as standard
  • Raspberry Pi 3 Model B (only 40P type) and Tinker Board compatible

新產品*樹莓派RS485擴充板(4埠, UART)*

新產品*樹莓派 RS485 擴充板(4埠)*發表囉~ 歡迎來信選購或洽詢~

商品規格

1. Provide extra 4 UART TTL output

4x UART TTL output TX, RX, GND, 3V3, CTS, RTS

2. 2 sets I2C signal output GND, 5V, SDA, SCL for extend extra UART HAT

3. TTL UART1 support ESP8266 WiFi module socket

4. Provide an individual 3.3V power for UART & output port

5. Provide HAT EEPROM for future driver program update.

Provide other Linux OS support (without HAT EEPROM )(option)

6. Extension port for RS232/RS485 module board

7. Raspberry Pi 3B & Pi Zero W still can use on board Bluetooth & WiFi

8. Provide Serial GUI Control Panel– Control up to 4 Serial Ports

9. Provide command line mode to activate serial ports through terminal/ssh.

相關文件

Software Pack

商品內容

1x Rs-Pi 4xUART-Ext Main Board

1x RS485x4 extension board

1x Manual