Strobe Light

Luxeon Flash for Cell Phone Camera, PDA and DSC Applications

The following reference design outlines the key considerations in the construction of a solid
state, high performance flash solution utilizing Luxeon® LED technology. This design integrates Lumileds high power Luxeon Flash product with a cost effective lens solution to provide the necessary...

Tiny, Efficient High Power LED Camera Flash Solutions for Cell Phone Applications

Cell phones and PDAs are approaching the limit for small form factors, but their feature sets are growing with new functions such as built-in cameras and even video cameras. The initial in-phone cameras were basic, low resolution devices with little in the way of usable flash capability. However,...

Slave Flash Trigger Circuit

This circuit (the Bucciarelli one) is designed to sense a sudden increase in light and does so extremely well. A few of these were actually built and tested and found to not trigger from normal room light. They sometimes malfunctioned if the phototransistors were aimed at fluorescent lamps at...

Emergency strobe flasher generates 250V

Figure 1 shows a complete circuit for an emergency lamp that operates from a 12V automotive battery. The xenon flash tube requires a 250V-dc anode voltage and a 4-kV trigger pulse. To generate the 250V dc, IC1, a switching regulator controller, and T1, a standard Versa-PAC transformer, operate in...

Electronic flash trigger

A negative pulse at the input is fed via capacitor Cl to the input pin (2) of the IC, Pin 2 is held slightly above its triggering voltage of 1/3 Vcc by the voltage divider comprising Rl, R2 and RV1, The negative pulse triggers the IC and the output (pin 3) goes high for a time period controlled...

Mini pocket stroboscope

This circuit is a mini storoscope which you can make so small that it can fit into your pocket. The circuit is not very powerful, but is works out of two small 1.5V batteries for an hour constantly and maximum flash rate. The flash rate is variable from zero to about 10 Hz. Supplying the enormous...

Mini strobe light

This is a mini strobe light. NE555 is used as a self oscillator. The width of output pulse is changed by the variable resister. 25msec means 40Hz. 6m sec means 166Hz. A LED is connected on the output of this oscillator. Therefore LED twinkles from 40Hz to 166Hz. I lighted a speaker by this...

LX1995 LED DRIVER: CAMERA FLASH APPLICATION

Many high end PDAs and smart phones have adopted color LCD screens. These LCDs are usually illuminated using white LEDs as a backlight. Since white LEDs require a higher voltage than the typical battery voltage, a boost circuit is required to boost the battery voltage. Many smart phones and PDAs...