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.

Looks like I have to upgrade the challenge:
- delay the reveal to give more time because of new rules.
- introduce a new point notation system of 10 points.
- require at least 6 points to win.
- The winner is the one with the most points.
Read more 🧵1/4

One winner takes all. No second place. 5 $ USDC or nothing.
4/4

Points notation:

A: 1 point - name all pieces of the device

B: 4 points - find what the device can do

C: 2 points - provide correct examples of what the device could be used for

D: 3 point - find what the device was actually used for

A+B+C+D = 10 points.

Winner has to answer in the cast with at least 6 points.

An answer is either truo or false. Example if you name none or only a part of the pieces in A, you have 0, only all the parts gives 1.

Correct answers will be determined at the reveal and will be verifiable by anyone.

Yelling and unmannered complaints will lead to 4 points removed from the total.

3/4

Reveal date is pushed to Sunday June 1st. Same time 1200 UTC. 2/4

And the decrypted answer (but you can verify):
This device is a USB to 5v switch. You plug it on a computer using the USB, then send the right command to the USB device, basically just a few bits, and it either open or close the circuit that allow 5v current to output from the white dual poles connector.

It was used to turn on or off a power plug controlled by 5v. If the plug was powered, it delivered 220v if not, it was of. This allowed me to control an external USB drive from a NAS to power the drive before backup, and turn it down after backup was done.

when i am good,i am best😊& when i am bad,i am
 worst😈 so be carefull

I think it’s realy old one i never use computer that time so i don't know completely.

Hum not really. You are right on the USB ftdi component though.

I think it’s some kind of USB, 
It's use for computer and it can  determine the port number with some functions of the FTDI DLL file. 
With that it is also possible to determine whether the device is connected.