Current Formula of MOS As shown in the figure, for an NMOS, we first make a one-dimensional assumption, equivalently treating it as an NPN semiconductor junction, considering only the variation of current along the channel in the x-direction. For this model, the current through can be calculated as: After applying voltage, the voltage difference at … Read more
Experimental Environment Recently, the microcontroller enthusiast used ESP32 and Phyphox to plot the I-V characteristics of a solar panel. The experimental circuit is simple to set up, with automatic data collection and automatic graphing, saving time and effort while yielding good results. What used to take dozens of minutes to complete can now be done … Read more
Introduction On the third day of the Lunar New Year, we built an experimental circuit on a breadboard to “plot the I-V characteristics of a diode in the conducting state.” A programmable resistor board was used as the internal resistance of the ammeter, a potentiometer was used as a variable resistor to control the circuit, … Read more
Recently, the microcontroller enthusiast conducted an experiment to plot the I-V characteristics of a conductor, aimed at learning how to use Bluetooth dual-channel data transmission. In this experiment, the voltage data transmitted via Bluetooth channel 1 is assigned to the x-axis, while the voltage data from Bluetooth channel 2 is assigned to the y-axis, thereby … Read more
Recently, the microcontroller enthusiast has been using Phyphox and ESP32 Bluetooth to redraw the I-V characteristics of a light bulb, continuously changing the experimental parameters in hopes of finding the optimal settings. In one experiment, the enthusiast set the sampling frequency of the ESP32 to 100Hz and slowly adjusted the voltage across the light bulb … Read more