Hardware

Repair mechanical keyboard PCB faults in 15 to 30 minutes with a basic soldering iron. Covers diagnosis, tools, soldering, and continuity tests.

Build a portable pen testing lab on Raspberry Pi 5 with Kali Linux for $200-250. A pocket-sized kit with Nmap, Burp, Metasploit, and Aircrack-ng.

Silent mechanical switches with dual silicone pads and TPE damping eliminate noise while preserving tactile feel. Best for office, coding, and gaming.

USB camera LED indicators are hardware privacy signals. Some Linux systems allow disabling them through kernel modules or firmware, with trade-offs.