The YX850 Power Failure Automatic Switching Standby Battery Lithium Battery Module DC5V-48V Emergency Converter. It is an automatic switching module. When the battery is dead or there is a problem with the battery, it is powered by the power supply.
The TIP140, TIP141 and TIP142 are 100V 10A 125W Silicon Epitaxial-Base NPN power transistors in monolithic Darlington configuration, mounted in TO-220A/B Package.
The BCX71 (BJW) is a PNP general purpose transistor SOT-23. Features. Low current (max. 100 mA) Low voltage (max. 45 V) Low noise. AEC-Q101 qualified. Target Applications
The ESP32-S is a wireless module based on ESP32, supports Wi-Fi and Bluetooth 4.2, with built-in 32Mbit Flash, in the SMD38 package. There are also on board PCB antenna and metal shield.
The MAC97A8 is a 600V 0.8A Silicon Bidirectional Thyristors Designed for use in solid state relays, MPU interface, TTL logic and any other light industrial or consumer application. Supplied in an Inexpensive TO-92