Handheld computing carrier board for a salvaged CPU module using a 100-pin mezzanine socket, with preserved 2S battery charging, balancing, and service-friendly edge I/O.

Handheld Xbox 360 system with integrated controller electronics, battery-managed USB-C PD power, and a separate dock that automatically switches display, Kinect, and DVD drive paths through a mezzanine docking interface.

Two-PCB low-noise EEG system: Digital board (ESP32-S3-MINI-1U + ADS1299 + CP2102N + USB-C + 1S Li-ion charger/power-path + DF40 mezzanine) and Analog board (3x ADS1299 + REF/BIAS/DRL + driven-shield electrode interfaces + local low-noise regulation + test points). DF40 mezzanine carries only power + digital SPI/control with shared SPI, shared START/RESET, and separate CS/DRDY per AFE. 4-layer stacks with strong analog/digital partitioning and interleaved GND pins on DF40.

Piggyback USB2.0 Type-A Mezzanine Interposer with Reverse-Current Protection, Tamper-Resistant D+/D− One-Shot Shunt, Supercap Backup, and SI-Compliant Chassis-Mounted Shielding

100 Position Connector Receptacle, Center Strip Contacts Surface Mount Gold #CommonPartsLibrary #Connector #Rectangular-Connector #Array #Edge-Type #Mezzanine #DF40C