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Wireless Doorbell Reference Design
Renesas' RL78/G11 and ISL80505 application uses built-in sub-GHz wireless communication to notify a remote receiver
Renesas' quick solutions feature a reference design for a wireless doorbell solution that will notify a remote receiver when a doorbell is pressed. The transmitter and the receiver utilize a built-in RL78/G1H sub-GHz wireless communication module, which is controlled by the RL78/G11 microcontroller (MCU). The ISL80505 single-output low-dropout regulator (LDO) assists in receiver power management by offering 500 mA output current at an input from 1.8 V to 6 V, providing extremely stable voltage.
When pressing the transmitter button, an LED will light up and wireless communication commences. When the signal is received by the receiver, its LED will also blink, and a speaker will emit sounds. This design is suitable for use in homes and offices.
- Schematic: Renesas Wireless Doorbell Schematic
- Schematic (Receiver): Renesas Wireless Doorbell Schematic Receiver
- Schematic (Transmitter): Renesas Wireless Doorbell Schematic Transmitter
- User Manual: Renesas Wireless Doorbell User Manual
- BOM (Receiver): Wireless Doorbell Receiver BOM
- BOM (Transmitter): Wireless Doorbell Transmitter BOM
RL78/G11 MCU
| Image | Manufacturer Part Number | Description | Core Size | Speed | Connectivity | Available Quantity | Price | View Details | |
|---|---|---|---|---|---|---|---|---|---|
 |  | R5F1056AASP#30 | IC MCU 16BIT 16KB FLASH 20LSSOP | 16-Bit | 24MHz | CSI, I2C, UART/USART | 310 - Immediate | $2.69 | View Details |
Embedded Evaluation Board
| Image | Manufacturer Part Number | Description | Core Processor | Platform | Utilized IC / Part | Available Quantity | Price | View Details | |
|---|---|---|---|---|---|---|---|---|---|
|  | YQB-R5F1057A-TB | RL78/G11 EVAL BRD | RL78 | - | RL78/G11 | 1 - Immediate | $16.20 | View Details |
