TREE

This circuit is basically a 8W inverter circuit . The  circuit continues to be intended to drive an 8W fluorescent lamp from a 12V power supply, utilizing an cheap inverter primarily based on a ZTX652 transistor. The inverter will operate from supplies in the variety of 10V to 16.5V, obtaining efficiencies up to 78% as a result causing it suitable for use in on-charge devices like as caravans / mobile homes / RVs and also periodically charged devices like as roadside lamps, camping lights or outhouse lights etc. Other capabilities on the inverter are that it oscillates at an inaudible 20kHz and that it contains reverse polarity protection.  8W Fluorescent Lamp Inverter based ZTX652 Circuit Diagram  Download the 8W fluorescent lamp inverter application note: » Download Download the ZTX652 datasheet: » Download

This is a Simple Emergency Lamp and Turning Indicator Circuit Diagram .White LEDs are replacing the conventional incandescent and fluorescent bulbs due to their high power efficiency and low operating voltage. These can be utilised optimally for emergency lamp and vehicle turning indication. The circuits for the purpose are given here. Emergency Lamp and Turning Indicator Circuit Diagram fig 1 Fig. 1 shows the circuit of a white-LED based emergency lamp . You can also use arrays of white LEDs as daytime running lamps in automobiles. In the emergency lamp , seven 1.2V AA-size Ni-Cd cells giving 8.4V have been used as the power source. The brightness is controlled by duty-cycle variation of an astable multivibrator working at 1 kHz. The astable multivibrator is built around IC1. Its output is connected to LED-driver transistor T1. Up to six branches of white LEDs can be connected in parallel, with each branch containing two LEDs in series (only three branches are used here). Depending o...

This is an LDR based Emergency Lamp that turns on a High watt White LED when there is darkness in the room. It can be used as a simple emergency lamp in the child’s room to avoid the panic situation in the event a sudden power failure.It gives ample light in the room. The circuit is too simple so that it can be enclosed in a small box. A 12 volt miniature battery is used to power the circuit. Two transistors T1 and T2 are used as electronic switches to turn on / off the white LED. When there is sufficient light in the room, LDR conducts so that the base of the PNP transistor T1becomes high and it remains off. T2 also remains off since its base is grounded. In this state, White LED remains off. When the light falling on the LDR decreases, it cease to conduct and T1 forward bias providing base current to T2. It then turns on and White LED switches on. Mini Emergency Light Circuit White LED used in the circuit is 1 watt High bright Luxeon LED . Since 1 watt White LED consumes around 300 m...