Practical Electronics  |  February 2023
Tesla Coil:
This simple device generates extremely high voltages, enough to form a 'flame discharge' resembling a flame. It can also demonstrate wireless power transmission.
Cooling Fan Controller & Loudspeaker Protector:
This board controls up to three cooling fans, switching them on at a pre-set temperature and ramping their speed. It also protects speakers from damage.
Driveway Gate Remote Control:
Sliding/swinging gate controllers inevitably fail after some years of service. The solution is to replace the controller with this much more robust design.
Geekcreit's LTDZ V5.0 Spectrum Analyser:
This compact unit is low in cost but can perform spectral analysis from 35MHz to 4.4GHz, controlled from a PC using a very impressive free application.
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Series, Features and Columns:
Make it with Micromite;
Park 44: A PicoMite Fingerprint Reader
Circuit Surgery;
Part 6: Electronically controlled resistance
Max's Cool Beans;
Part 2: Arduino Bootcamp
KickStart
Part 11: Sensing the environment - introducing the BMWE280 sensor
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Articles in this issue
Below is a selection of articles in Practical Electronics February 2023.