LED Flasher High Visibility

thingiverse

I needed a bright flasher to turn on while riding from the train station to work. To simplify citrofan's design, I reduced many vertices, making it easier to modify the lid and box mount points. Additionally, I stretched it vertically so that LEDs mounted in the lid and a 9V battery can fit. My initial attempt used a relay circuit that consumed batteries even when turned off. This new version employs two transistors and significantly less power. Here's what you'll need: - A 9V battery and connector - Two 100 ohm resistors - Two 100 Kohm resistors - Two 10 uF capacitors - Two 2N3906 transistors (or equivalent) - Sixteen high brightness LEDs - An SPST slider switch - Two zip ties For the transistor circuit, see https://www.eleccircuit.com/dual-led-flasher-by-2n2907/#Dual_LED_flasher_circuit_using_PNP_transistor. Changing capacitors and resistors allows you to adjust the alternating LED arrays' speed. Experiment on a breadboard until you get what you want. If interested in the relay circuit, search YouTube for "Relay LED flasher." I used a GEO 3F-12V3 relay but again, this circuit consumed way too much power.