Programmable 12V Relay With LCD Timer

Compact 12V DC programmable relay module with integrated LED display and optocoupler-isolated input. Physical size: 52 × 38 × 18 mm; mass: ~45 g. Requires stable DC 12V supply. Supports loads up to DC 30V / 10A or AC 250V / 5A. Draws only 20 mA in standby and 60 mA under operation. Certified for continuous use between -25°C and +85°C ambient. All configuration data is preserved when power is removed. User interface consists of four mechanical push buttons (K1–K4) and a numeric LED display. Press-and-hold K1 enters parameter setup: select mode (P-11 to P-36), then set A-time (e.g., ‘A123’), B-time (‘b45’), and optional C-cycle count (‘C05’) where supported. K2/K3 increment/decrement values; short press = ±1, long press = ±10. K4 shifts decimal point position to switch between seconds (0.01–999 s) or minutes (1–999 min). Display can be turned off/on anytime with K4 to reduce ambient light in dark environments. Used widely in DIY automation, smart home retrofits (e.g., timed boiler control), test benches, agricultural timers, and educational electronics projects — especially where deterministic, repeatable, and electrically isolated relay actuation is needed without relying on software or external timing components.