leds.want to make a stop turn brake light.about 20 or 25 bulbs. Answered

How much power will it take to light the bulbs?does a resistor need to go in front of each bulb?

Asked by frankentrike 8 years ago | last reply 8 years ago



DiY Led Wiring in brake lights

I just got on the site and love it, because I love to make my own stuff as well as learn but anyways.. UPDATE: I got 50, 5mm LEDS wired and working in my taillights. The results are so good so far. Thanks for any help.

Posted by fastback570 10 years ago | last reply 10 years ago


'73 Harley- Electrical Emergency! Answered

Ok, biker boys (and girls), I need help. After sitting all winter, I fired up my '73 Shovelhead. I had a battery charger attached (charging 12v @ 6 amps). The bike fired up on the fourth or fifth kick (YAY!!!), but then promptly fried the headlight, the taillight, and caught the charger on fire (in the carport). What do you think is wrong? Defective regulator? Poor regulator ground? I want to ride this weekend, so help me ASAP!!!!?

Asked by skunkbait 9 years ago | last reply 9 years ago


leds.strip lights?

22 inch long strip surrounding an exhaust tip.want  an led every inch.my main prob is i dont know how physically big is an led.5 mm?3mm?dime? pencil eraser?that odd looking mole on my....,well you know. how big are the darn things?also,do i put a resistor every 2 or 3 bulbs according to volts and ohms and such or one really badass resistor at the begining.next ,the resistor drops voltage for the following leds in line.if the led in front is getting proper watts or voltage,then the one after that is getting less and so on,isnt it?i dont know help? 

Asked by frankentrike 8 years ago | last reply 8 years ago


I recently saw an electric 3 wheel motor scooter that looked like a cross between a Roman chariot and a Segway. Help!

I recently saw an electric 3 wheel motor scooter that looked like a cross between a Roman chariot and a Segway. The driver could only stand while riding and moved at about 10 mph. The chassis looked like it came from one of those senior citizen scooters, the tires looked like boys' 15 inch street bicycle wheels. It had a headlight and taillights along with a trailer hitch.  My question is does anyone have the plans or at the very least pictures of something similar?

Asked by javajunkie1976 7 years ago | last reply 3 years ago


Looking for cheapest, simplest way to randomly light multiple led's? Prefer not to use arduino or similar. Maybe 555?

I am working on a project to sell which will have multiple led's lit at different times. I guess it would be like those old pictures or posters they would sell that had led's in places where the lights might be in a cityscape (windows of skyscrapers etc.), or the taillights or headlights of a car, or the street lights lining a city block. Since I am wanting to sell these items, I obviously need the cheapest, most efficient way of doing this in order to make a profit. Using an arduino is not how I want to go. I do have some electronic knowledge, however, could use any ideas/ suggestions. Also need ideas on smallest brightest led's available. The led's that are in led strips really seem to be what I would like to use, but don't know if these can be purchased and used individually. Thanks.

Asked by stevecinstrfme 5 years ago | last reply 5 years ago


Weed Whacker-Powered Bicycle

This is a bike I built a year ago. It uses a 30.5cc (about 1.5hp) weed whacker engine for propulsion. A version of the same thing was on Instructables, and that's what partially inspired me to make this. ;) The engine mounts are made out of wood, because I still have not learned to weld, but they hold up just fine. The engine is an ten-year-old Echo weed whacker. It has 10,000 max RPMs. The bike peg attached is 2" in diameter and gives about 25mph top speed. There is no clutch! The one that came with the engine was way too flimsy for a vehicle like this so I took it out. Saved a lot of space, too. For the throttle, I disconnected the back brake line and connected it to the engine. The front brakes are still intact, and you can turn the engine off to slow the vehicle as well. I added the extra heatsink to the engine to help keep it cooler, as it was never meant for this kind of exertion. It gets as hot as the engine, so I guess it conducts the heat away pretty effectively. There is a 10-LED bargraph to show the engine temperature. It uses an LM3914, an op-amp, and a thermistor. There is also a 555 to drive a buzzer when it gets too hot. The bike has head and taillights that are both driven from a joule thief. They are not very bright; they are more for being seen than to see. Here's a youtube video, taken almost a year ago: http://www.youtube.com/watch?v=bdySFqmK0Fw Some more photos and a little more information: http://forums.modretro.com/viewtopic.php?f=3&t;=656 Comments/criticisms? :)

Posted by 1up 8 years ago | last reply 8 years ago