+12V DC Input ---> [ Inductor 220µH ] ---> [ Fast Recovery Diode (UF4007) ] ---> +400V DC Out | | [ IRF740 MOSFET ] [ Filter Cap ] | 4.7µF 450V [ PWM Driver IC ] | (NE555 / MAX1771) GND
| Section | Critical Parts | Value/Rating | | :--- | :--- | :--- | | | Ferrite core (EE25), IRF740 MOSFET, UF4007 diodes | 1.2kV out, 30kHz | | Focus/Bias | High voltage resistor chain (10MΩ + 5MΩ trimpot) | 1W, 3kV rating | | Deflection | APEX PA94 or discrete (BF869/BF870) | +/- 100V @ 50mA | | DAC | MCP4922 (12-bit, dual) | SPI interface | | MCU | Teensy 4.0 or STM32F103 | 72MHz+ for vector speed | | Power | 6.3V AC transformer (for heater) + 24V DC supply | Galvanic isolation |
Designing a CRT clock requires a deep understanding of analog waveforms, high-voltage safety, and digital logic. This technical guide breaks down the core sections of a CRT clock schematic, explaining how to manipulate an electron beam to display time. Understanding the Architecture of a CRT Clock
Outputs voltage corresponding to the horizontal position of the beam.
yeah I think we're think we're down some voltage there or something pretty blurry definitely better so we'll stick with this. too. YouTube·CREEKVIEW ACRES
+12V DC Input ---> [ Inductor 220µH ] ---> [ Fast Recovery Diode (UF4007) ] ---> +400V DC Out | | [ IRF740 MOSFET ] [ Filter Cap ] | 4.7µF 450V [ PWM Driver IC ] | (NE555 / MAX1771) GND
| Section | Critical Parts | Value/Rating | | :--- | :--- | :--- | | | Ferrite core (EE25), IRF740 MOSFET, UF4007 diodes | 1.2kV out, 30kHz | | Focus/Bias | High voltage resistor chain (10MΩ + 5MΩ trimpot) | 1W, 3kV rating | | Deflection | APEX PA94 or discrete (BF869/BF870) | +/- 100V @ 50mA | | DAC | MCP4922 (12-bit, dual) | SPI interface | | MCU | Teensy 4.0 or STM32F103 | 72MHz+ for vector speed | | Power | 6.3V AC transformer (for heater) + 24V DC supply | Galvanic isolation | Crt Clock Schematic
Designing a CRT clock requires a deep understanding of analog waveforms, high-voltage safety, and digital logic. This technical guide breaks down the core sections of a CRT clock schematic, explaining how to manipulate an electron beam to display time. Understanding the Architecture of a CRT Clock +12V DC Input ---> [ Inductor 220µH ]
Outputs voltage corresponding to the horizontal position of the beam. yeah I think we're think we're down some
yeah I think we're think we're down some voltage there or something pretty blurry definitely better so we'll stick with this. too. YouTube·CREEKVIEW ACRES