I can provide a large number of spare parts for old PCs.
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Versatile I/O Options: With 11 digital I/O pins and 1 ADC pin (supporting input from 0 to 3.3V), the D1 mini nodemcu esp8266 wifi iot board provides flexible options for connecting various sensors and components, enhancing its utility for a wide range of applications.
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Based on ESP8266 module, four-layers process, enhanced impedance matching, stronger signal, more stable connection. 1 ESP8266 WiFi Module. Standard Pico header, supports for Raspberry Pi Pico series.
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eBay
WiFi module, all I/O ports are led out, and it supports DC7-28V/5V power. The I/O port and UART program download port of the WiFi module are all. On-board mature and stable ESP-12F WiFi module, large capacity 4M Byte Flash;.
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NodeMCU developed based on ESP8266, compatible with existing versions;. ESP8266 has full IO ports for direct download without resetting;. ESP8266 full IO port export, direct download without reset. Chip model: CP2102.
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Feature: 1. Item Type: 4 Channel Relay Module. If you do not receive our reply within 48 hours, pls. If you are satisfied with our service, pls.
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eBay