Hey everyone! I'm diving into an art project where I've painted a unique canvas featuring a bleeding heart on a candle, shielded by an umbrella. I'm planning to add colored LEDs to light it up from the back – an orange LED for the candle flame and a red one for the heart. My goal is to power this whole setup with either AA or AAA batteries, and I want a switch to control the lights easily. I'm looking for recommendations on the best equipment to buy, like the types of LEDs, cables, switches, battery boxes, and anything else I might need. By the way, I already have a soldering machine and know how to solder. I appreciate any guidance you can give me!
2 Answers
For your project, I recommend using standard 5mm orange and red LEDs – go for super bright ones if you want those colors to really shine through your canvas! You'll also need resistors for each LED to prevent burnout; for a setup with 3 AA/AAA batteries (totaling 4.5V), a resistor value between 100-220 ohms per LED should work well. Don't forget a battery holder for the 3x AA/AAA with leads, and for the switch, a simple inline toggle or slide switch that's rated for low voltage should be fine. For wiring, something like 22-24 AWG thin, flexible hookup wire will be perfect for connections. Since you're familiar with soldering, just put the resistors in series with the LEDs and wire them in parallel to the battery pack, placing the switch on the positive lead for easy access! Also, for neatness, consider using heat shrink tubing or electrical tape to tidy up the connections.
I think the advice above is solid! Just a point to elaborate on: when working with LEDs, they can come as raw diodes or with built-in series resistors, so choose wisely. Typically, a standard red LED has about a 2V drop, and yellow ones around 3V. Performing a quick test with a temporary setup before soldering can help you find the right brightness without the risk of mistakes. If you need brighter lights, you can reduce the resistor value, but keep in mind the max current for your LEDs to avoid damage.
Thanks for the clarification! Having those specifics really helps when putting it all together. Should I try different resistors for brightness, or stick to the recommended ones for longevity?