electronics

A hobbyist describes how to create a homemade FET transistor using a cadmium sulfide photocell, tape, and water as an insulated gate, demonstrating transistor action in a dark environment.

The author is physically building the classic pinball game 'Space Cadet Pinball', with key improvements such as addressing flipper overheating, insufficient pop bumper power, and creating an upper playfield and a unique ball return mechanism.

A beginner electronics roadmap from a maker who went from not knowing how to light an LED to building rovers and winning hackathons. It covers understanding circuits, using an Arduino, and building real projects.

A detailed guide on building and understanding the TD4 4-bit DIY CPU kit from Aliexpress, covering soldering, schematics, and operation principles.

This research explores using hydrogels to increase the dimensionality of transistors, potentially enabling new flexible or bioelectronic devices.

This article describes techniques for creating glass-to-metal seals for homemade vacuum tubes, explaining the challenges of thermal expansion mismatch and how to electroplate copper onto steel wire to improve bonding.

The article details the process of cloning a Sennheiser BA2015 battery pack using inexpensive NiMH cells and an NTC thermistor, criticizing the high cost of the original and providing a DIY alternative.

A detailed guide to building a low-cost, versatile direct digital synthesis (DDS) signal generator with features like sine, square, triangle, sawtooth waveforms, adjustable frequency, amplitude, duty cycle, and modulation.

A hobbyist project demonstrates hosting a simple website on an 8-bit AVR microcontroller using SLIP over a serial connection to a Linux PC, avoiding the need for Ethernet hardware.

Step-by-step guide to building a simple radio wave detector using aluminum foil and a piezoelectric lighter, explaining the physics of electromagnetic waves.

The article explores the surprisingly enduring legacy of vacuum tube technology, detailing its historical origins and continued use in applications like high-power radio transmitters, microwave ovens, and CRT displays, despite the dominance of semiconductors.

The MNT Reform is an open-source hardware laptop designed and assembled in Berlin, featuring modular aluminum and acrylic construction. The article documents personal ownership experiences, case modifications, compatible accessories, and community hardware tweaks.

A detailed examination of the clock generation hardware in the Super Nintendo, explaining the two oscillators and the adjustable capacitor used to produce the required frequencies.