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external 4M PSRAM
Use the Smartconfig technology to complete the configuration of the account and password of the ESP8266 WIFI module on the mobile APP
74HC86 is a quad 2-input EXCLUSIVE-OR gate
High speed multiplying input slew rate: 8 mA/μs
74HC154 is a 4-to-16 line decoder/demultiplexer
Pcb Lines (15x9 cm) Heart-Rate Sensor external 4M PSRAMIntroduction : Single side Printed Prototype. General purpose board primarily used for components and IC for quick testing, sample circuits, experiments and learning. Features : Size : 15x9 cm. Layers : Single layer. Design : Lines.
