Stereomicroscope Ringlight Supply

As mentioned on my MBS-10 post the power supply of the ringlight I have for the former isn’t quite up the the safety standards I’d like. It was one of the cheaptest I could get and the quality of the power supply matches that. So I decided to built myself a new one!

Overview Inside view

It’s an unregulated 12-15V power supply with an adjustable current limiter consisting of a TIP41C transistor. I used a lot of hot glue to secure the front panel components, as they wouldn’t probably hold on the plastic panel.