Help about Arduino [Remote control for buzzer]

Projects General Guidance
1

hello, I'd like to create a bracelet that has a button that when pressed transmits signal to an object then the object makes a sound via buzzer.

Me and my friends have come up with this hut we're not sure if this is correct,

Bracelet (Transmitter)

Microcontroller: Arduino Nano
HC-05 Bluetooth Module
Button
Power Supply: Battery
Enclosure: Bracelet case
Object (Receiver)

Microcontroller: Arduino Nano
HC-05 Bluetooth Module
Buzzer: Produces sound
Power Supply: Battery

2

Just get a remote control and mount it on a bracelet.
Connect the receiver to your buzzer.
No Arduino, no programming needed.

3

how far should it send?

4

just for household

5

you can build a sending prototype on breadboard, connect with smartphone and go thru household watching how it receives.

6

They are sold as "key finder". Batery operated 433mhz transmitter fob and battery operated receiver with buzzer.

7

there are many remote door bell for sale

9

ESP32's have BLE built in.

Nano33 IoT and Nano33 Sense do as well

10

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