Build a 10W LED flashlight that features swappable UV/IR/visible heads. We decided to document the build since this flashlight would fit nicely in a photographer`s kit for light painting, IR illumination, UV reflected photography, or UV fluorescence photography. Our flashlight is based on LedEngin`sLZ4-40_ series 10W LEDs. These are available in wavelengths ranging
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from theinfrared through the ultraviolet. White-light LEDs of different color temperatures are also available as part of this series. WARNING! This flashlight is capable of producing very powerful invisible radiation in the UV and IR. The eye`s protection reflexes do not work at these wavelengths, and may thus cause extensive damage if exposed to direct or specularillumination. In addition, UV at 365nm may cause damage to the skin. Never point this flashlight at anyone without taking proper precautions! The flashlight is powered from 4 9Vlithium batteries or from an external 14 to 30VDCpower supply (12VDC also works, but may not achieve full power output). Start by constructing the flashlight`s body from an 8 ³-long piece of standard-wall aluminum or PVC 2 pipe-size (2 3/8 OD) tube. Drill a 3/8 hole 1. 5 ³ from one end for the pot, an a 5/32 ³ hole for switch another 1. 5 ³ away. We also drilled and tapped a 1/4 ³-20 hole on the bottom so that the flashlight could be mounted on a standard tripod. Start to assemble the electronics by soldering the size M coaxial power jack to the LED output of the LuxDrivemodel A011-D-V-700700mAFlexBlock Constant Current Driver. Use a piece of heat shrink tubing to insulate the center connector to prevent shorting. Next, solder the 20 kOhmlinear pot to the LuxDrivemodel A011-D-V-700700mAFlexBlock Constant Current Driver. Notice the connections such that the turning the pot clockwise...
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
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The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
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In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
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