An Arduino Nano or a Micro might be the best ... They both have two GND pins, two reset pins, one AREF pin, and three power pins (3.3V, 5V ... D8 to D10, and D12. The PWM output pins on the ...

It has 20 digital input/output pins (of which 7 can be used as PWM outputs and 12 as analog inputs), a 16 MHz crystal oscillator, a micro USB connection, an ICSP header, and a reset button.

Electronics enthusiasts, makers and developers searching for a super small 32-bit Arduino ... by either the Micro USB port, 3.3v to 20v input pin (regulated to 3.3v with a 3.3v output pin ...

PD Micro is the first Arduino-compatible board with USB Type-C Power Delivery, which allows your project to make use of voltages from 5-20 V. It’s ...

The idea was to make a 5V 50Ω buffer, but this easily converted into a 3.3V 50Ω output despite the 5V rail by switching in three resistors (see diagram). Update : for a 10:1 attenuator for a 50Ω ...