My main goal is to use connect the HC-SR04 ultrasonic sensor with ESP8266.
Problem is, HC-SR04 works with 5V while the ESP8266 works with 3.3V In order to solve this, idea would be to use a logical level converter.
I bought some of this 3.3V 5V TTL Bi-directional Logic Level Converter(s) a good while ago, and thought they would fit best for this project.
Here's my setup
- 5V from arduino
- 3.3V from digital power supply
- GND connected together
- Nothing connected to TX0 (HV side)
- Voltmeter connected to TX1 (LV side), still getting a 3.3V
Am I doing something wrong ? Any suggestions would be appreciated !