I don’t have any particular purpose for this light, it is just a fun project. To be exact, I notice that the supply amperage of the converter was mA in first case supply voltage 1. With the LED circuit, it would last the better part of a day. For reference, theres another method to this design but its significantly more complicated in terms of passive components required, but its still a 2x 2N Signal transistor circuit. English Choose a language for shopping. Read the datasheet, and pay attention to the value of R1 in the schematic on page 7.

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I put one wire from the 3. I have not had a chance to play with these yet, as there is too much going on in my life to mess with personal projects like that. The two LEDs light up fine.

If you haven’t used a resistor in your experiments and the LEDs didn’t go up in smoke it’s probably because the battery can’t supply too much current.


Haikal – Be sure to have enough voltage drop 40am the resistor you need a resistor! Help – I want to power a 5 mm LED from 1.

Help – I want to power a 5 mm LED from V alkaline cell

Write a customer review. What voltages did you try? Thanks for your explanation. Last edited by thezman; at Thru-hole mounting is much easier on the hands if your hands shake or your not good with the iron.

‘Resistance’ of an LED | LEDnique

I don’t have any particular purpose for 4ma light, it is just a fun project. Last edited by Calina; at Two LEDs in series require at least 4. The inspiration for this circuit was lights described at http: Haikal – edited my answer. I assume that the first LED consumes 1.

The 3 batteries AAA size are 1. Owner, Illumn Join Us on Facebook!

‘Resistance’ of an LED

Will it work with two LEDs in series? Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies.


Instead you .15v have to do something like: It looks promising, though. Look on the LED’s data sheet for the recommended operating current, or, failing that, the Maximum Recommended current.

Though a LED which fails because of too much current will usually be open, not shorted.

Ledd recommendations for this item Typical ranges go from 1. I want to use only one cell at a time. You normally control the LED current using a resistor in series.

The capacitor should have a very small series resistor, otherwise the efficiency decreases. Withoutabox Submit to Film Festivals. DaveO God Member Posts: I safely powered it from my Uno using the 3. I’m pretty sure that there are multiple answers on this oed with the information that you require. Be the first to review this item.