There was a problem completing your request. Customers also shopped for. The time now is The converter was based on the self-oscillating converter principle. A very important one. OK, so if I run it from an Arduino Uno 3. Sorry, we’re having trouble showing recommendations right now.

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That’s well within the limits of the Arduino output, and if it’s bright enough for your purpose, very good. If you divide by 1.5b, you get the resistor value in Kilohms.

‘Resistance’ of an LED

Haikal – Be sure to have enough voltage drop over the resistor you need a resistor! A very important one. See questions and answers. There’s a problem loading this menu right now. Michel de Ruiter 4. This might be stupid question, but can you elaborate more on the voltage drop?


I recommend doing this project the fun way The variation of the output amperage and efficiency for the two settings of converter are shown on fig. MarkT Brattain Member Posts: It looks promising, though. I assume that the first LED consumes 1. In our case, the battery’s voltage is equal to ldd sum of the voltages over LEDS and resistor.

Some of the modders may have a couple 40mx spares; might check the Homemade and modified BST? Two LEDs in series require at least 4. The data sheet for these LED devices is needed. So, if I give it 3. Please send me a PM!

KVL says that the sum of all voltages in a loop is zero. Amazon Rapids Fun stories for kids on the go. I want to use only one cell at a time. Sign up using Facebook.

Convert battery powered LED light to power supply – Resistors

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The special “low saturation” transistor BD was not very good, just a bit better than BC Thanks for your explanation.

I have no idea what site I got this off of, but based on the concept notes I’ve copied onto a. You have to do something with that, if you connect the three just like that there might flow a very large current which can destroy your LEDs. I tried also a capacitor with higher capacitance in series with a small resistor, but the results were worse. Amazon Renewed Refurbished products with a warranty.

If you have any other suggestion, I’m listening. The important part of the converter is the transformer. Post as a guest Name.

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