This assumes that you carry on meets the dimensional limits of your airline.
I'm certain that TSA agents have pretty well seen everything when it comes to people hand carrying electronic parts and systems. However, there seems to be no mention of miscellaneous electronics on the TSA's What can I bring site
But the TSA has this helpful advice:
For items not listed here, simply snap a picture or send a question to
AskTSA on Facebook Messenger or Twitter. We look forward to answering
your questions, from 8 a.m. to 10 p.m. ET weekdays; 9 a.m. to 7 p.m.
I would do that as a first step anyway.
The TSA also says
Planning ahead and packing properly can facilitate the screening
process and ease your travel experience at the airport. Know what you
can pack in your carry-on and checked baggage before arriving at the
airport by reviewing the lists below. Even if an item is generally
permitted, it may be subject to additional screening or not allowed
through the checkpoint if it triggers an alarm during the screening
process, appears to have been tampered with, or poses other security
So even if you get an approval from their customer support, I would still expect that your carry on will be subjected to a secondary screening, and that you should definitely arrive earlier at the airport than usual in order to allow for the extra time.
As for worrying about being a bomb, the TSA has access to chemical analysis equipment and can easily take a swab and process it in a matter of minutes. So unless you work in a chemical/explosives factory you shouldn't be worried about that aspect.
Amusing anecdote. A colleague of my brother in the UK did work with various chemicals and once took his work laptop on a flight one day. It had so much chemical residue on it that it pegged the measuring device. The security staff were confused by this and came to the conclusion that the machine was broken, and let him pass. He of course kept his mouth shut as to why the measuring machine was acting strangely.