Crt Clock Schematic Jun 2026

There’s something mesmerizing about a displaying the time. Unlike a simple LCD or LED clock, a CRT clock is a hybrid of retro hardware and modern microcontroller control. Whether you salvage a small 3-inch green-phosphor tube from an old viewfinder or use a 5-inch oscilloscope tube, the heart of the project lies in the schematic .

The system consists of five major stages: Crt Clock Schematic

: These circuits control the horizontal (X) and vertical (Y) plates of the CRT. Schematics often use dedicated tubes like the EF80 or high-voltage transistors (like the STP2NK90Z ) to amplify low-voltage signals into the hundreds of volts needed to move the electron beam. There’s something mesmerizing about a displaying the time

void drawVector(int x, int y, bool draw) digitalWrite(Z_AXIS, draw); // Turn beam on/off delayMicroseconds(2); // Settling time analogWrite(X_DAC, x); analogWrite(Y_DAC, y); delayMicroseconds(20); // Deflection speed The system consists of five major stages: :

Finally, the signal reaches the output stage. The voltages from the DACs are precise but weak; they cannot drive the magnetic yoke or electrostatic plates of a CRT directly.

Designing or building one requires a mix of low-voltage digital logic and high-voltage vacuum tube circuitry. 1. Fundamental Block Diagram