For a hobbyist on a budget, this was the most valuable section. It included designs for: Signal generators (sine, square, and triangle waves). Transistor testers. Capacitance meters. Logic probes. 3. Power Supplies
The book includes several designs for simple receivers (AM/FM), signal boosters, and even low-power transmitters (for educational purposes), providing a hands-on introduction to the world of RF engineering. Why Is It Still Relevant Today? elektor 305 circuits
Long before "Smart Homes" were a thing, Elektor was teaching readers how to build ultrasonic parking sensors, light-sensitive switches, and electronic combination locks using CMOS logic gates. 5. Radio and HF (High Frequency) For a hobbyist on a budget, this was