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Help for beginners
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Help for beginners

by Lindaemma on Tue Oct 03, 2017 6:35 pm

HELP!! All the information I am seeing is way over my head. I want to wire two LED lights to one coin cell battery with an on/off switch for inside a costume. What do I use to connect the LED lights to the battery? The costume I will be using this in is worbla so I cannot use the metal thread to sew the lights into the costume, most likely I will have to glue it to the inside. What makes the connection??? No where do I see the very basics to help me out.

Your site has many cool items, but it would help me to have a more basic video showing the steps I need for the LED lights.

Thank you.

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Joined: Tue Oct 03, 2017 6:07 pm

Re: Help for beginners

by franklin97355 on Tue Oct 03, 2017 7:36 pm

Which lights are you planning to use and where in the costume will they be placed? You would run wire to the leds from the battery and place the switch in one of the wires at the battery end. You can get battery holders from our shop.

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Re: Help for beginners

by RES on Tue Oct 24, 2017 3:10 pm

An LED need a series resistor to limit the current (through the LED).
Two LEDs (in series) need one series resistor too. Value of the resistor depends on the colour of the LED. What colour are the LEDs? Both the same or different colours? High efficiency LEDs have a transparent dome but emits coloured light. There are a few types of LEDs, hi-eff, normal and low current. If the coin cell is 3V and the LED emits red light, you need a resistor of 3V-1.8V/20mA -> 68 Ohm. Two red LEDs in series would stay off because 2*1.8V=3.6V, is higher than 3V. So you have to connect the two red LEDs in parallel, each LED needs a(t least) 68 Ohm resistor.(or higher value if the light intensity is too high). Basic can still be confusing.

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