From afbc34d018bff2cfa0fe47103e78430360d42dfe Mon Sep 17 00:00:00 2001 From: Ricardo Lima Caratti Date: Tue, 23 Jul 2024 12:20:25 -0300 Subject: [PATCH] Doc --- examples/03_LCD_16x2_AND_20x4/README.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/examples/03_LCD_16x2_AND_20x4/README.md b/examples/03_LCD_16x2_AND_20x4/README.md index 91cde9a..2901f0c 100644 --- a/examples/03_LCD_16x2_AND_20x4/README.md +++ b/examples/03_LCD_16x2_AND_20x4/README.md @@ -46,7 +46,7 @@ The following schematic illustrates the connections between the Arduino Nano, th ### IMPORTANT -**There are some important considerations when using a microcontroller like the Arduino Nano with the "DIY 5~7W FM Transmitter Kit". This kit is designed to work with a 3.3V controller, meaning the I2C bus is configured with pull-up resistors connected to the board's power supply. However, the Arduino Nano operates at 5V, producing a 5V signal on the I2C bus, which can cause instability in I2C communication. Additionally, the Arduino Nano will not operate stably when powered by a 3.7V supply (provided by the kit)**. +**There are some important considerations when using a microcontroller like the Arduino Nano with the "DIY 5~7W FM Transmitter Kit". This kit is designed to work with a 3.3V controller, meaning the I2C bus is configured with pull-up resistors connected to the board's power supply. However, the Arduino Nano operates at 5V, producing a 5V signal on the I2C bus, which can cause instability in I2C communication. Additionally, the Arduino Nano will not operate stably when powered by a 3.3V supply (provided by the kit)**. **The most straightforward and suitable solution, though not very practical, would be to modify the Arduino Nano to operate at 3.3V (by changing the crystal to 8MHz, among other modifications, including changing the bootloader). The most viable solution would be to use an "Arduino Pro Mini 3.3V". This way, no changes or adaptations would be necessary to connect the kit to the microcontroller**.