I purchased a Japanese transformer for a project I’m doing. It runs on 100VAC, not 120V, something I overlooked. Doing a quick search, Japan seems to use both 50/60Hz, based on the region.
It’s 30 years old and there’s no information about frequencies on it. I haven’t plugged it into anything yet.
How exactly will it respond to 120V? Here are some possible outcomes I’ve thought of with my limited knowledge.
- It will initially work for a few minutes/seconds, then it will get fried and become useless
- The output voltages/current will become stronger
- Nothing will happen, and then it will get fried and become useless
Here’s a part of the schematic I’m using it for. It’s supposed to output +15V, -15V, and +5V.