The circuit requires only two resistors, and the software to make everything run – a simple Python script – toggles the pin between input and output, checking if the button is held down for ...

The y-axis represents the output current at that pin. In Figure 2 , the output pin traverses from 3.3 V below ground up to 3.3 volts above the power supply voltage. With this excursion, you can see ...

A novel full-wave rectifier turns an audio power amplifier into a simple modulator, that is then used to modulate an ...