Building a (also known as an Oscilloscope Clock ) is a complex but rewarding project that repurposes vintage Cathode Ray Tubes to display time. Unlike standard digital clocks, these use vector graphics to "draw" clock faces directly on a phosphor screen. Core Circuit Modules
: Components like EF80 vacuum tubes or high-voltage transistors (e.g., ZTX458 ) that amplify signal voltages to the levels needed by the CRT deflection plates. CRT Tube : Popular 2-inch and 3-inch models include the , , and . Crt Clock Schematic
The CRT clock schematic is an exercise in hybrid analog-digital design. While modern TFT displays are simpler, the CRT's glowing green phosphor and analog vector movement provide a unique aesthetic. The critical challenges are designing a high-voltage, high-speed deflection amplifier and correctly timing the Z-axis blanking. The resulting device acts as a fully functional clock and an oscilloscope-like display for vector graphics. Building a (also known as an Oscilloscope Clock