Multifunctional safety indicator light circuit

A multifunctional safety indicator light circuit, comprising:

• an emergency indicator unit;
• a power supply circuit comprising an AC power input terminal, a battery circuit, a switching circuit for switching power supply between the AC power input terminal and the battery circuit, and a discharging circuit for discharging the battery circuit;
• a mode selector switch comprising a continuous test mode terminal, a manual test mode terminal, an AC indication mode terminal, and a common terminal;
• a test unit comprising a detection circuit connected to the emergency indicator unit and a manual test switch for manually triggering a test;
• and
• a control unit comprising a timer and a plurality of terminals, the detection circuit and the manual test switch being connected to a first terminal and a second terminal of the control unit, respectively;
• the common terminal of the mode selector switch being connected to a third terminal of the control unit;
• and the continuous test mode terminal, the manual test mode terminal, and the AC indication mode terminal being connected to different input pins or specific levels of the control unit, respectively;
• wherein,
• when the mode selector switch is set to the continuous test mode terminal, the control unit periodically activates the detection circuit through the timer to monitor a status of the emergency indicator light unit;
• when the mode selector switch is set to the manual test mode terminal, the control unit, upon detecting a signal from the manual test switch, triggers the switching circuit to shift to battery power and activates the detection circuit to monitor the status of the emergency indicator light unit;
• and
• when the mode selector switch is set to the AC indication mode terminal, the control unit controls the switching circuit to turn off the battery circuit.