Soldering a 3×2.5mm IMU — Building a Dual-IMU Board for RC Car Autopilot скачать в хорошем качестве

Soldering a 3×2.5mm IMU — Building a Dual-IMU Board for RC Car Autopilot

In this video I design, assemble, and test a custom dual-IMU PCB built around two tiny inertial measurement units in a 3×2.5 mm package . One sensor is from TDK InvenSense (ICM-42670-P) and the other from STMicroelectronics. The goal is to compare both sensors and build a compact IMU module that will later be used as part of an autopilot system for my RC car. The board connects to a Raspberry Pi Zero over I²C, allowing both sensors to be read simultaneously. During the build I cover: • finding and analyzing the datasheets on DigiKey • designing the schematic and PCB in EasyEDA • creating a two-layer PCB with shared ground and test points • using zero-ohm resistors to selectively connect sensors to the I²C bus • soldering tiny 14-VFLGA chips using solder paste and hot air • debugging and checking for shorts with a multimeter • detecting devices with i2cdetect • generating a quick Python test script with Codex to read sensor data After assembling the board, I connect it to the Raspberry Pi and demonstrate reading accelerometer and gyroscope data from both IMUs at the same time. One interesting detail is that the sensors are mounted rotated 180°, which simplifies PCB routing but causes the X and Y axes to appear with opposite signs in the output. This board will later be used in a heading-hold autopilot for an RC car, where the vehicle will be able to maintain a given direction automatically using IMU feedback. Hardware Used • TDK InvenSense ICM-42670-P IMU • STMicroelectronics LSM-series IMU • Raspberry Pi Zero • custom two-layer PCB designed in EasyEDA Tools • hot air rework station • (old) solder paste + flux • multimeter (continuity testing) #pcbdesign #easyeda #raspberry #raspberrypi #inertia #robotics #rccar #autopilot