Projects and Circuits
14 Brainwave Monitor. This Arduino-Nano-based project can detect your brainwaves, display them on a computer screen or save them for later analysis.
22 Super Digital Sound Effects Module - Part 1. This powerful module can be loaded with dozens of sound effects or audio tracks, short or long, and boasts virtually unlimited playback time and advanced controls.
30 Control your PC with an infrared remote. Operating a keyboard/mouse from the couch with a home theatre PC (HTPC) is clumsy. Use this IR remote for important functions like play, pause or next track.
35 Watchdog Alarm. Are your kids very territorial? Do they want extra security against invasion of their rooms by pesky siblings? Here’s a door alarm they’ll love!

Series, Features and Columns
8 The Fox Report. 5G primer
10 Techno Talk. Cosmic radio cracked
12 Net Work. The conflicting requirements of security, cooperation and trade that lie at the heart of the Huawei debate; plus, the latest broadband-from-space news.
40 Electronics for a car dynamometer. Electronics ingenuity gets a second-hand ‘rolling road’ up and running for a fraction of the cost of a new one.
44 Circuit Surger. Understanding bipolar junction transistors - Part 2
50 Audio Out. The PE Theremin - Part 3
58 Max’s Cool Beans. Nixie party, 4-bit computers and a stability question
62 Make it with Micromite. Part 7: Adding sound to a project; Micromite and Apple Mac
76 Electronic Building Blocks. World’s best DIY car immobiliser

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