Do It Yourself

First to guess what this is and what it was used for wins 5 $USDC !

Just found this small device I built 15y ago. If was stored in an meds tube.
Guess what it is and what it was used for and I send 5 $USDC on your Warpcast wallet.

This is an FTDI USB to serial adapter board. It's used to convert USB signals to serial communication signals (like TTL UART) and vice-versa, which is crucial for interfacing computers with microcontrollers, embedded systems, and other devices that use serial communication. It allows for tasks like programming microcontrollers (e.g., Arduino), debugging, or simply communicating with serial devices.

Crypto Activist || Educationist || Airdrop Hunter ||

or better still @nicom It seems to show an electronic component labeled 'fs 691c'. and based on my search, 'CV 691C' may refer to a ventilation valve used in vintage Chevrolet vehicles.