Hey Guys,
So I've assigned myself the classic task of building a basic bench power supply. My setup as follows:
- 50Hz 2A Center tapped transformer 240VAC to 15-0-15VAC
- Full wave rectifier (1N4002) + smoothing caps (4700uF)
- Some op amps and adc's driving a LM317 and a LM337 (controlled by an Arduino)
The supply is working great but what I've noticed is that when I turn it off, the Samsung LED monitor on my desk seems to brown out or something. Not every time but at least every second time. They're both connected to the same wall socket.
I cant seem to understand why this happening. As far as I know, transformers have a current spike when switching on but not switching off.
I've attached a link to a video of this happening. Any ideas as to whats causing this?
TL;DRWhat is happening in this (short, 47 second) video?
Link: http://youtu.be/SAHdi3oygYsNote: The popping sound in the video seems to be coming from my PC speakers. It's a lot less dramatic in real life I think.