https://easyelectronicsproject.com/mini-projects/battery-level-indicator-circuit/
Battery Level Indicator circuit with LM3915

Upcoming Home Automation project with Alexa & ESP32

https://iotcircuithub.com/blynk-esp32-home-automation/
This ESP32 control smart relay has the following features:
1. Control home appliances with WiFi (Blynk App)
2. Control home appliances with manual switches.
3. Monitor real-time feedback in the Blynk App.
4. Control home appliances manually without internet.

You need just an 8-channel relay module & ESP32 board to make this smart home project.

https://iotcircuithub.com/esp8266-arduino-home-automation/
This Smart Home System has the following features:
1. Home appliances control from WiFi (Blynk App)
2. Home appliances controlled with manual switches.
3. Home appliances controlled by TV Remote (Infrared)
4. Relays controlled by temperature & Humidity sensor (DHT11) automatically.
5. Home appliances controlled by Dark Sensor (LDR).
6. Monitor LIVE temperature & humidity reading on the smartphone.
7. Monitor real-time status on the Blynk App
8. Inbuilt Arduino so Arduino code can be uploaded to the relay module.