How to make an Emergency bulb at home. Low Cost Brightness full Automatically On/Off Emergency Bulb.

Should a Diode be attached to a Relay Learning Step by Step with Practical Sinhala Tutorials -    • Should a Diode be attached to a Relay Lear...   How to make an emergency bulb at home. How to create a light bulb that burns brightly for a long time very easily and at low cost...? I have presented everything in Sinhala in a very simple and easy-to-understand manner. If you are not familiar with mains electricity, get help from someone who is.