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Arduino as timer for strobe light driver#
Arduino as timer for strobe light code#
Arduino as timer for strobe light Pc#

Arduino as timer for strobe light code#

If you decide to code it yourself, be prepared to try out the following Arduino Sketch at the outset, as it may lead to some amazing ideas. The above timing values are never stringent, so many strobe codes on the web can help you make your own LED strobe. For example, a strobe pulse with 4ms on time and 54ms off time, thus a total cycle time around 17.2Hz with about 6.8% duty cycle.

Arduino as timer for strobe light driver#

The strobe pulse that drives the power LED driver can be a logic-level (high or low) signal which has a short on time and long off time. Resistance values up to 470Ω can be trialed here – the actual value depends on the current you want through the LED (this isn’t a complicated design process, but there’re a few important things to keep in mind when doing it – more on this later). The 220Ω resistor (R4) limits the current flow through the LEDs housed inside the H11AA1 optocoupler. Finally, since the input element is an ac (bidirectional) optocoupler, it’s easy to trigger the driver either with a logic-high or logic-low output signal rendered by a 5V (or 3.3V) microcontroller. Likewise, the IRF630 MOSFET (T1) is not a critical component – it’s okay to go for certain drop-in replacements. You can of course configure this flexible circuitry to run on other dc power supply voltages simply by changing the value of the 2.2KΩ resistor (R1). This is an isolated power driver circuit based on an ac optocoupler H11AA1 (OK1) designed to work with 36V (typical) dc power supply. At this point, note that in cases like this, a MOSFET is usually a better fit than a BJT. This is a non-affiliated link to get the module online Īfter setting up your power supply module, all you have to do is attach an electronic switch as shown in the sample schematic below.

Working Temperature: -40 ~ + 85 degrees.

Output Voltage Range: 2.5-36V continuously adjustable.

Here is a quick overview of the XL4015 IC based power supply module ( ) It’s in fact a switching converter – linear regulators have the advantage of very clean output with little noise introduced into their dc output, but they can be much less efficient than switching converters especially when it comes to work together with high-power LEDs. Probably, the easiest method for setting up a high-power LED power supply is to buy a readymade constant-voltage/constant current (CC/CV) buck-converter power supply module similar to the one shown below. I can clearly share a design that includes hard-to-find and pretty expensive components to achieve, but what fun is in it? Since this is not final project idea, I would like to simplify this section by discussing a general design concept rather than a complex end-user circuit. This is required for almost all LED strobe projects ( ). It includes an additional ‘electronic switch’ to control the LED using an external circuit. High power LED driver means a DC power supply that is well-designed to power the LED in hand. Moreover, be cautious, careless experiments with such a COB LED module may permanently damage your eyesight because the light source is dangerously strong! High-Power LED Driver

Arduino as timer for strobe light Pc#

A CPU cooler mechanism from an old PC or Peltier freezer would work well for you – perhaps you may have one (or more) in your garret. It shouldn’t be turned on without a proper heat sink assembly at all.

Keep note that efficient cooling is very essential for this LED module, even if you want to operate it only for a moment. Similar COB LED modules should be energized with constant current source because the voltage drop across a diode changes with its temperature, which if powered from a voltage source would result in a change in current as it heats up, which could eventually destroy it. I did a quick test of this LED module with a constant-current switch mode power supply (1400mA 35V) and got cheerful results. Quick specifications of this particular LED module are listed below: The COB (Chip On Board) simply denotes that this module has a number of LED chips in one package as a single module. In the above figure, what you see is a cool-white 50W COB LED module once I got it from a Chinese online store. If so, you can easily build a tactical torch or similar light weapon too! High-Power COB LEDĪs mentioned before, an LED strobe certainly needs a powerful LED light source for most common applications. This time, the main focus is on the power LED driver circuit concepts, because a powerful strobe light requires a very strong light source. So, let me start again with some new ideas. But the sequel to the first post seems to be much awaited by regular readers. This is the concluding part of the LED strobe article published last year ( ).ĭuring this long period (sorry for the inadvertent delay) I have already shared several strobe light ideas.