ESP32-S2-Saola-1 uses a WS2812 as an indicator light, which can display various colors. In earlier versions of CircuitPython, ESP32-S2 does not support WS2812, but in the latest circuitpython 6.0 beta...
I recently repaired a circuit board. When mapping the schematic diagram, I found a current amplifier circuit. It used an op amp LF356, without any peripheral devices. Pin 2 was directly connected to t...
The driver software of the data acquisition device converts the binary code value output by the analog-to-digital converter into a voltage value by multiplying it by a constant. Good relative accuracy...
How to connect the freewheeling diode? If it is connected as shown in the picture, it should not be removed. If it is not connected, the reverse voltage will cause the VS voltage to increase....
Since the UWB (Ultra Wide Band) system uses a broadband of more than 500MHz to transmit data at high speed, the UWB antenna must have good frequency characteristics. In recent years, OFDM (Orthogonal ...
Question 1: I use the STM32F103 series microcontroller to output 3 50% duty cycle PWM waves, but the transmission distance is about 80cm, and ordinary wires are used. So after adding a NAND gate to th...