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get a Feedback line from the collector of TR1 to the base of TR2 and TR3 so all of the
               transistors will be in the saturation mode and the LED will light up, we use TR3 to discharge
               the capacitor and make sure that it is empty.










































               When you press on the push button again, the Feedback signal which is making TR2 in the
               saturation mode will go directly to the capacitor, so TR2 will be in the Cut-Off mode,
               accordingly TR1 and TR3, the LED will turn OFF,and the capacitor will charge again.


               8.5 Example Picture





























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               Electronics Starter Kit r.00                                                 www.plusivo.com
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