As a “proof of concept” project, I took a string of battery operated leds (Cheapos) like you can find in a craft store. They run on two #2032 batteries using six volts at 5ma. I connected the lights to a five volt output wall wart and the lights worked. Is there any inherent danger in doing this? I’m not sure I’d use them for anything, but it was an interesting project. Thanks.


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led's come in many ma and voltages quite common are the 3 volt maybe 20 ma current draw it all depends what your application is. if you tell us what your trying to do someone can steer you in the right direction. led's are very cheap! and they come in many mm sizes 2 3 4 5 etc millmeters!

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Thanks! I had lit some of my buildings with those battery operated tiny leds and just ran them off of a couple AAA batteries wired in series (3 volts). But I keep forgetting to shut them off and it’s a PITA re-battery-ing them. I was sort of thinking running them to a buss and powering them all with the wall wart. I’m sure there are more elegant solutions to my McGuyver idea.

The more LEDs you hook up to the wall wart, the better. One 9 volt battery will run 100 plus 5 MM LEDs.  It;s not the volts, it's the Amps.  5 Volts and probably 5 MA shouldn't effect the bulbs.  If they appear to be the correct brightness, they should be fine.  Worse that can happen is burnout. If there is too much amperage, they will pop first...  Just monitor if you are not sure of the AMPs, or test with a multi meter....😃



If they were using 6V to light them, 5V shouldn't be a problem.  If you're happy with the light output, you're all set.

I'm not sure I understand the more is better comment.  The 5V wall wart is almost surely regulated, so more LED's will not change anything but the load on the supply.

Yikes!  Don't connect the 8 ohm (or 6 ohm in some units) directly to the smoke output!  You'll surely take out the triac on the R2LC, and you'll also incinerate the smoke unit!  If you're going to eliminate the regulator (not a bad idea, they're $30), You need to change the resistor in the smoke unit to something at least 20 ohms or larger.

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