Hobby Projects - Insulation tester, LED Circuits, Meters.

Friday, August 13, 2010

Mains Powered China Emergency Bulb

A typical Mains Powered China Lamp. On power down, LED light turns on for around 1/2 hr. Gets damaged on lightning activity and wide (uS not nS) transients above 300V. Drawing may have error.

Mains Powered China Emergency Bulb

Many products and components were made over the last 10 years with less regard to voltage and current ratings and product safety.

The circuit design is not everything, engineering the product for reliability, usability and safety is very important. This Schoodle is like a Satire to emphasize the responsibility of electronic manufacturing and engineering.