: 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 .
// Draw Minute Hand points[62] = 0, 0, Z_OFF; points[63] = sin(angle_m)*0.6, cos(angle_m)*0.6, Z_ON; Crt Clock Schematic
The core architecture of the schematic is divided into three distinct voltage domains: the low-voltage logic section (5V DC), the medium-voltage analog driver section (±12V to ±50V), and the high-voltage section (approx. 1,000V to 1,600V for the anode and focus grids). Successfully reading a CRT clock schematic requires understanding how these three worlds interact. : Components like EF80 vacuum tubes or high-voltage
, sometimes up to 1000V+) required to accelerate electrons and produce a sharp beam. 1,000V to 1,600V for the anode and focus grids)
, build the deflection and Z-axis first and test using an oscilloscope in XY mode. Then add the HV supply. And always – one hand in pocket when probing live circuits.