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 New my Smoke Absorber and helper

Monday, July 14th, 2014

This is a new smoke absorber and helper which good quality and have a smoke filtration system. I was ever presented a them in “DIY Smoke Absorberand helping hand” which can create by myself, it works well, but bizarre shapes, and no filter. During the semester, I took the kids visit the town. and Have […]


 Refrigerator Door Detector Alarm

Sunday, July 13th, 2014

This is a Refrigerator Door detector alarm, it will detect light of lamp in the fridge and alert with buzzer. This projects is small size, easy to make and cheapest. It will alarm when Small child secretly eating candy or medicine stored in the refrigerator or sometimes forget to close the door is not closed. […]


 Over and Under voltage protection of electrical appliances

Friday, July 11th, 2014

This is an over and under voltage protection to all electrical appliances are safe. We use electronics circuits, high accurate work is fast LM393, AN6780 and more. Which cut off currents with power relay. I’ve presented this way, it is Over & Under Voltage protection circuit. But today, I’d recommend this because there is a […]


 12V battery to 5V 1500mA DC converter regulator

Thursday, July 10th, 2014

This is a 5V 1500mA DC regulator circuit. which is simple circuit using IC-7805 to fixed regulator 5 volts and TIP41-NPN power transistor to increase current up to 2A. Example experiment. I use the power supply for 12V battery. To reduce constant pressure 5volts. I try to load is 4.7 ohms 5W resistors principles it […]


 Boost converter 5V to 12V

Tuesday, July 8th, 2014

This circuit offers a variety of Buck DC to DC converters. Because as circuit increase voltage of 5 volts to 12 volts. This circuit is called Boost converter circuit. The primary circuit is shown in Figure 1. According to primary circuit, when switch (S) Closed cause a voltage drop across L, or Caused UL is […]





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