樹莓派3 Raspberry Pi 3 - 使用 74HC595 Shift Registor 及 3 個 GPIO 控制 8 顆 LED

74HC595 接腳位的圖片說明:

Source: pimoroni.com

腳位編號	名稱	說明
1-7, 15	Q0 ~ Q7	輸出腳位
8	GND	接地
9	Q7’	序列輸出 (Serial Out)
10	MR	Master Reset, 清除所有資料, 低電位有效
11	SH_CP	SHift register clock pin (Clock Pin)
12	ST_CP	STorage register clock pin (Latch Pin)
13	OE	Output Enable, 允許輸出，低電位有效 (Active low)
14	DS	序列資料輸入 (Serial data input)
16	Vcc	供應電壓

樹莓派3 LCD 資訊看板 Raspberry Pi 3 LCD Info Board

利用 16x2 LCD顯示屏偱環顯示：

1. 當前日期和時間
2. 樹莓派 IP 地址
3. 室內溫度和濕度
4. CPU溫度和使用
5. RAM使用情況
6. SD卡使用情況


電子零件：

1. 麵包皮 x 1
2. LCD 16x2 字元顯示屏 x 1
3. 10K可變電阻 x 1
4. DHT11 溫度、濕度感應器 x 1
5. 開關按鈕 x 1
6. 陶瓷電容 x 1
7. 330Ω 電阻 x 1
8. 10KΩ電阻 x 2
9. 母對公、公對公杜邦線數條 

使用樹莓派3 (Raspberry Pi 3) 作為 Wifi 熱點

Source:
https://frillip.com/using-your-raspberry-pi-3-as-a-wifi-access-point-with-hostapd/

Packages

The first step is to install the required packages: sudo apt-get install dnsmasq hostapd
I'll go into a little detail about the two:

• hostapd - This is the package that allows you to use the built in WiFi as an access point
• dnsmasq - This is a combined DHCP and DNS server that's very easy to configure

Configure your interfaces

The first thing you'll need to do is to configure your wlan0 interface with a static IP.
If you're connected to the Pi via WiFi, connect via ethernet/serial/keyboard first.