# Using Raspberry Pi to Control a PWM Fan and Monitor its Speed

A lot of people uses fan to cool down their Raspberry Pi 4, but the fan’s noise is quiet problem (in a quiet room). In most case pi didn’t need that amount of cooling performance, so we can use PWM (Pulse Width Modulation) to control fan speed and reduce the noise.

# A Better Server Status Monitoring Tool - Glances (htop/top Alternative)

Recently, I’m looking for a temperture and cpu status monitor for my Pi nas server. vcgencmd command and htop get the jobs done, but it’s always better to have them in the same window (htop can’t show temperture which bothers me alot). So I found an cross-platform, python-based htop alternative - Glances, it’s easy to install and super handy. The only downside is that it uses a bit more cpu resources than I expected (on Pi4 4GB version).

# 安裝 Aria2 在 RaspberryPi 上搭建低耗下載機

Aria2 是一個超輕量但功能的強大開源下載器，支援多點下載、多種協定、檔案分割下載、可透過 JSON-PRC 或 XML-PRC 遠端控制等功能。

# Use Raspberry Pi to build a FAKE TimeCapsule (and NAS) - Hardware

There are plenty of Mac mini case modification projects on the internet. Though the unibody aluminum housing design had been there for almost a decade, it’s still the best looking mini computer case on the market imo.

In mid 2019, Raspberry Pi receive a huge update - the Pi 4. We finally got true gigabit ethernet, USB3.0 support, and a lot more. This makes Pi 4 suitable for simple NAS project (also for TimeMachine backup). So I decide to build a fake(?) TimeCapsule with Pi (at least the case is real, or should I just call it “Fake Mac mini” ? lol)

# 利用 Raspberry Pi 搭建 NAS

BTW 目前還是使用 Pi3B ，升級後會在補上 Pi4B 速度的差異心得。未來打算再裝上 Aria2 讓 Pi 具有下載機的功能。

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