Electronic health care night light circuit

Psychological medicine research shows that if you are in darkness for a long time, people will become depressed and the regulation of human endocrine will be affected. Therefore, appropriately adding a little light in the sleeping environment is beneficial to human health. For this reason, here is an electronic health care night light. The internal wiring of this lamp is shown below. Capacitor C steps down the 220V mains power and supplies it to light-emitting diodes D5-D9 to emit light after being rectified by diodes D1-D4. Light-emitting diodes should be green because green can make people quiet and relaxed. The electronic health care night light has soft light, can produce a lighting effect similar to moonlight, and creates a hazy and warm lighting environment, which helps people to calm down and fall asleep peacefully. On hot summer nights, this night light can also give people a quiet and cool visual experience. Due to the use of semiconductor light-emitting elements, the lamp has a power of only 0.3 watts, which is very energy-saving and durable.