The Wireless Doorbell application uses sub-GHz wireless communication to notify a remote receiver when the doorbell is pressed. The transmitter and receiver both have a built-in RL78/G1H sub-GHz wireless communication module, RL78/G11 for control. When the transmitter button is pressed, its LED lights up and wireless communication starts. When the receiver receives a signal from the transmitter, its LED starts blinking and the speaker emits sounds. The wireless doorbell is suitable for use in the home or office.
The ISL80505 single-output low-dropout regulator (LDO) is used for receiver power management. The ISL80505 can supply up to 500mA output current at input from 1. 8V to 6V, providing extremely stable voltage.
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Renesas demonstrates the Wireless Doorbell quick solution featuring the RL78/G11 and RL78/G1H microcontrollers. Using home wireless technology, the transmitter can send signals to the receiver without any connecting wires and is suitable for use in the home or office.