MagneticWireless turn signals

I realize this may not be a very "good" way to accomplish this but have to keep it simple as I'm a noob. If there is a better way to mirror the bikes turn signal activity wirelessly to the helmet over RF, I'm open to suggestions

Wireless turn signals forantiquecars

I am going to build turn signal (LED's) into my motorcycle helmet and have them be triggered wirelessly when the turn signals (and/or brake light) is activated on my motorcycle. Basically what this guy did here, but won't share his build info

I think it's a great idea. Finally somebody that's not trying to build a internet controlled robot for it's first project. Only think I would change is I would drop the 433 and switch to a nRF24L01 and add something like CRC. With the nRF24 it's also easy to send stuff back like the battery level of the wireless device

Wireless turn signals formotorcycle

A voltage divider is the simplest way. Be aware that the "12V" on a bike or car electrical system cam be way over 12V (maybe 16V or more), so the voltage divider should be designed for that. There are many voltage divider calculators on the net.

Temporaryturn signals forcar

I want the turn signals to be in sync with each other. So my thought is to simply use the 12v that appears/disappears at the bikes turn signal as it flashes to trigger a pin on the arduino high or low then have that wirelessly transmit that status (via 433mhz RF) to the ardruino nano in the helmet and drive the led(s) there accordingly with as little latency as possible.

My question is: What is the simplest way to get the bikes 12v (21w bulb) voltage down to 5V that the arduino can safely and reliably detect the status of the globe?

And I don't think a few LEDS and NANO/batt pose anywhere near as much "unintended use danger" as massive unbalanced gopro mounts, but thanks for the concern for the safety of my skull all the same. I don't plan to drill any holes...

folken692000: What is the simplest way to get the bikes 12v (21w bulb) voltage down to 5V that the arduino can safely and reliably detect the status of the globe?