EQKIT® ハート型ライトキット DIY LEDフラッシュ呼吸灯 パーツ 赤 緑 青 白 カラーオプション
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An easy enough kit for practice or beginners. The battery box is for 3xAA so only gives a max 4.5v meaning that when you turn the potentiometer down it goes so dim it can almost disappear, using up to 6v will prevent this. The blue kit that I chose is a pleasant colour on the eye and the kit came with 3 extra LED's so some spares for the box as well. I've also uploaded a video of it in action and some pictures in it's different states. For the price it won't disappoint.
Cute gadget. A beating heart with blue LEDs. Easy to make, good quality PCBs as well as various electronic components. Recommended for hobbyists and electronics enthusiasts.