Startup code for the Arduino UNO R4 boards (RA4M1 processor) to change from the internal HOCO clock to an external XTAL for the main processor functions. The USB interface remains on the HOCO clock.

The maximum PWM frequency depends on the CPU. On an Arduino UNO, for example, the maximum usable PWM frequency is 7812.5 Hz. For LEDs, however, a PWM frequency of about 250 Hz is usually enough. Less ...

The UNO R4 is powered by a 32-bit microcontroller, the RA4M1 processor from Renesas, which provides up to 16 times the clock speed, memory, and flash storage compared to the previous 8-bit technology.

I needed a low-cost test board I could use to demonstrate the issue of both radiated and conducted emissions and chose the Arduino Uno, as it's recently become very popular. The Arduino is an ...

Arduino has announced two new boards to the Arduino family UNO R4 Minima and UNO R4 WIFI. The board maintains the same form factor and shield compatibility as its predecessor but offers a significant ...

Arduino has introduced a Nano shaped board with a Wi-Fi and Bluetooth LE capable Espressif’s ESP32-S3 microcontroller, supporting it with the Arduino IDE and MicroPython. “Beginners can explore in an ...