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Making a Simple LED Circuit.This simple electronic circuit specialty for beginners. This is very simple LED blinking circuit. let's build with me. Please buy two general purpose Transistor, two 100 uF capacitor, two 33 kilo oms Resistor ,two LED and AAA or AA 1.5 V two battery.

How LED multi vibrator Circuit ( easy transistor circuit) design by Proteus Software. This software is able to provide users with practical feedback when designing real world circuit. This allows the designer to determine the correctness and efficiency of a design before the circuit is actually constructed. 1) Low cost any NPN transistor 2 2) 10uf to 470 uf Electrolytic Capacitor 2 3) 22 k two 2 4) 220 ohms resistor 2 5) LED 2

How to Repair dead UPS. ( UPS battery Replace ) some UPS not turn on without internal battery of battery low voltage. when you are not use UPS long period battery will be dead. In this ups also not use long time therefor this battery dead. I replaced the US battery. Uninterruptible Power Supply