LED Tester cum Light source. Start up circuit 1

8AStarting some simple projects for the beginners who are going to start the electronics project building. The first project is a simple LED Tester without any soldering. You can make it in few minutes. With this tester you can check all the LEDs and can also be used as a Light source.
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AC Powered LED. Design Note 47

This is the simplest type of a Night lamp that gives ample light in a confined area. It is a White LED lamp directly powered by 230 Volt AC. It uses only four components and can be enclosed in a three pin plug that can be plugged into the socket. It also functions as Power on Indicator, Cupboard light, Baby’s bed lamp etc. Its cost is just Rs.20 and power consumption is very low.
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