Or take it into an electronics-hobbyist shop, and show the people at the counter. Most of them are electronics-hobbyists themselves - like at fabric stores, the good ones try to hire people who actually use the stuff.
Seshat's self-help guide:
1. Would you rather be right, or get the result you want?
2. If you're consistently getting results you don't want, change what you do.
3. Deal with the situation you have now, however it occurred.
4. Accept the consequences of your decisions.
My professional areas of expertise are computing and writing: I am not a doctor or a lawyer.
When your health, freedom, etc are at risk, always see a professional.