| This fully analog, adjustable, medium-power symmetrical power supply contains no switching or digital components. It provides an output volt...
More about Circuits & Circuit Design (367)
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| This No-Silicon digital clock is a true nixie tube clock built with vacuum tubes and dekatrons — no microcontrollers, no chips, no transisto...
| Schaub-Lorenz Stereo 6000 is a reminder that “DIY audio” once meant serious mechanics, alignment, and proper bench work — not just wiring up...
| A blast from the Elektor archives: this clever 1998 battery tester uses a simple LED display to reveal a battery’s true condition under load...
| DIY Ram-Tester checks vintage 16- and 20-pin DRAMs used in TI-99/4A, C64, Amiga, Atari and others. Fast tests, OLED display, upgradable firm...
| Build the Elektor Wordy Christmas Tree: a 3D PCB Christmas decoration with a Raspberry Pi Pico, 27 RGB LEDs, and multilingual glowing messag...
| Unlock smarter workouts with a programmable fitness timer that guides your reps, rest periods, and routines with intuitive tones and an OLED...
| Need a Hall sensor? A strip of copper, a strong magnet, and an LM358 are all you need to explore the Hall effect hands-on. This experimental...
| Before trusting that bargain-bin power adapter, make sure it’s not packing surprises. This DIY AC power adapter tester quickly identifies vo...
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| The low-cost ESP32-C3 SuperMini modules feature a compact SMD antenna. However, the small antenna design greatly restricts the effective Wi-...