Free electronic circuit design and schematic diagram
The voltage boosting in this circuit enable its operation to be powered by 2.5 V rechargeable battery (two cells 1.2V rechargeable batteries), supplying 400 mA current at 26 V which is needed by the gas arc tube for portable ultraviolet lamp. This inverter circuit has a good efficiency as well, about 80%. Ultraviolet (UV) light is also known as black […]
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This is Electronic Ballast for CFL (Compact Fluorescent Lamp) circuit using IR2156. The IR2156 contains a high voltage half-bridge gate driver with a state diagram and programmable oscillator to make a full ballast control IC. The feature of IR2156 are programmable preheat time, programmable preheat and run frequencies, programmable over-current protection and programmable dead-time. Protection from filament failures, failure of […]
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This is a electronic ballast circuit using L6569. This circuit uses The L6569 because it can control a low voltage halogen lamp transformer or a symmetric half bridge inverter of a fluorescent lamp ballast directly. The prevention of cross conduction is done by Two 270mA buffers drive the inverter MOSFETs with a 1.25ms built-in dead time. This circuit need only […]
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This is a circuit of light ignition circuit. This circuit uses the LIC01 which is designed for high voltage pulse generation circuits. This circuit can be used in many application such as lamp flashing, metal halid lamp and high pressure sodium lamp. When this circuit is used in high surge current operation in rugged environmental conditions, the high performance planar […]
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Simplicity, low cost and improved efficiency when compared with the alternative options are the reasons why the switchstart circuit has been widely adopted. Moreover, the 230V mains voltage is sufficiently higher than tube running voltage to let the use of the simple series impedance ballast in almost every case. Where the mains voltage is not high enough, for example in […]
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Fluorescent lamp or tube lamp (TL) has good efficiency. This high efficiency feature make it suitable for battery operated lighting application. To drive the tube lamp, we need high voltage to make the gas inside the tube get ionized. Here is the schematic diagram of the fluorescent lamp circuit: To trigger the ionizing process, we need high voltage as high […]
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