1. Introduction
The IVL2-7/5 is a desktop clock built around an original Soviet-era vacuum fluorescent tube, housed in a full CNC-machined aluminum enclosure. Four physical buttons give direct control over time, alarms, brightness, and lighting effects.
- High-precision RX8025T clock chip
- 4 programmable alarms
- Countdown timer and continuous timer
- Adjustable VFD brightness and backlight
- 12/24-hour format with AM/PM indicator
- USB-C powered
2. Specifications
- Time Format: 12/24-hour — AM/PM shown in 12-hour mode only
- Alarms: 4 programmable alarms
- Countdown Timer: 59:59 → 0:00
- Power: USB-C 5V
3. Button Functions
Long-press any button to enter its setting mode. Button 1 selects, buttons 2 and 3 adjust, button 4 saves.
- Button 1 — Long press: Time setting. Button 1 cycles through fields, buttons 2/3 adjust, button 4 saves.
- Button 2 — Long press: Alarm setting mode.
- Button 3 — Long press: Countdown timer. Button 1 switches minutes/seconds, buttons 2/3 adjust, button 4 saves. Button 1 pauses, any button exits.
- Button 4 — Long press: Keyboard lighting effects. Buttons 2/3 select, button 4 saves, button 1 cancels.
4. Normal Mode
- Button 1: Toggle between time and date display.
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Button 2: Set alarm/timer alert mode:
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Mode 1— Sound only -
Mode 2— Sound + flashing -
Mode 3— Flashing light only -
Off— Disable all alerts
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- Button 3: VFD brightness — 10 / 25 / 50 / 75 / 100%
- Button 4: Night light speed — 6 levels, 10–100%
5. Notes
Do not connect two USB-C power sources simultaneously.
Factory Reset: Hold Button 1 while connecting USB power, then release to restore factory settings.