Circuit source: https://www.facebook.com/share/p/1HGut3uEAd/
This is a bad and dangerous design
This is a dangerous design. There is potentially lethal voltage on those probe pins. ⚡️☠️
I strongly discourage to build this.
Design problems
- no isolation from mains – test probes and circuit being tested dangerous to touch
- pointless filter coil in output
- open circuit voltage can be over 300V
- output capacitor in circuit directly on probes – high current surge when you connect probe can potentially damage LED being tested
1 Comment
Ava says:
Honestly, seeing a circuit design like this is pretty terrifying because it’s exactly the kind of “quick fix” that can go south in a heartbeat. It’s one thing to be a DIY enthusiast, but skipping basic isolation is just asking for a dangerous shock the second you touch a probe or a stray wire. I get the appeal of a simple build, but no project is worth risking your safety over a few bucks’ worth of components. It’s a good reminder that just because something works on a breadboard doesn’t mean it’s actually safe to use in the real world.