Archive for the ‘Lighting’ Category
SSL3250A Photo Flash LED Driver
We can use SSL3250A (an asynchronous boost photo flash dual LED driver) for mobile application. This device ensure a lot of implementation possibilities because it has wide input voltage range and the large maximum output current at a wide output voltage range. It has long battery life and low power strain because of it’s high …[Read More]
TDA3629 Light Position Controller
This is a Light position controller circuit. Light position controller is a monolithic integrated circuit which is used in passenger cars. Potentiometer on the dashboard is used to define the light beam’s elevation of the head light of the car to a state by the car driver. Here is the circuit: This circuit has some …[Read More]
The TPS61160/1 is a boost converter that drives up to 10 LEDs in series with a 40-V rated integrated switch FET. To reduce output ripple, improve convertion efficiency, and allows for the use of small external component, the boost converter is very usefull. The default white LED current is set with the external sensor resistor …[Read More]
Switchstart Ballast Circuit for Fluorescent Tube Lamp
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 …[Read More]
Soft Light Dimmer
This is circuit of soft light dimmer. This circuit uses the IGBT STGP10N50A and the TS555 timer as main components. Here is the circuit: The timer is triggered on the zero crossing voltage pulse. The time constant determined by C5/R14+R15 that is used to determine the conduction angle. The T2 – T3 inhibits the power …[Read More]
PWM Dimming for LED RGB Video Displays
This is an application that can be used to adjust LED brightness while maintaining superior color quality. This application uses pulse width modulation (PWM) dimming technique. This application can be used for single-line scrolling displays, transportation road signs, simple scoreboards, ever-expanding advertising markets encompassing convenience gas stations, shops, stadiums, and stores. Following figures shows color …[Read More]
Self-Writing LED Display Sign Controller
This is a circuit of self-writing LED display sign controller. This circuit consist of eight power shift register which are installed in cascade. The shift registers are used to turn on a string of 64 lamps or LEDs sequentially. Here is the circuit : When the shift register clock (SRCK) is clocked, the register is …[Read More]
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