1. Arduino UNO 2. Push Button 3. LED 4. 220 ohm resistor ( for the LED ) 5. Breadboard Usually we need a resistor for the push button. However, since the Arduino UNO has a pull-up resistor built into ...

Using an Arduino Uno R3 or R4 with a LED, and push button we will make a on and off switch. Resources. Readme License. GPL-3.0 license Activity. Stars. 0 stars Watchers. 1 watching Forks. 0 forks ...

Additionally, the REV2.1 has the Push-To-Talk button moved to the left side and a more visible status light. LILYGO T-TWR REV2.1 ESP32 walkie-talkie specification Wireless module – Espressif ...