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Flutter By

Move in front of one Flutter By and the display on its partner is activated, creating a mysterious sense of your presence far away. Each device has a PIR sensor that picks up movement and signals their partner devices. Movements are shown by a variety of ambient movements that are easy to see without being distracting. Flutter By come in pairs and are connected on the internet. Simply position the devices in areas you’re likely to be around, and they do the rest. You don’t need to trigger them: their partner devices will indicate your activity automatically as you go about your day-to-day life.

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Fans are spinning non stop / don't seem to react to the PIR sensor

When I set up two flutter by devices, the fans are spinning constantly.

I have tried pointing the PIR sensors in different directions, tried to cover them, stabilizing them, etc. I even unplugged them. The fans are still spinning. (changing the timing of the fans works, but then they will only stop shortly, then continue). What could be the issue here?

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We had a similar fault on our boards:

When we plugged them in, they started, like intended, by using the PIR Sensor but ran then continuous.

With only one PIR Sensor in the whole System it worked flawlessly to activate the fan on the second board.

Unfortunately with both PIR Sensors in the System it seemed like the second PIR Sensor was allways triggered, when the fan on the same board goes on, thus creating an infinite loop.

I don’t exactly know, what causes this.


We solved this problem, by putting at least one different PIR sensor in the System (a cheap adjustable one). Now everything runs completely fine and we are also able to increase the time the fan is active up to 5 more minutes thanks to the Potentiometer on the new PIR sensors.

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Author avatar Hans Hornbostel will be eternally grateful.