We are providing instructions for a DIY “Pink Noise Flashlight” hack. This is a very easy project and a very useful tool to test and verify microphones.
This device is a battery powered portable pink noise generator that is perfect for testing microphones. For only $35 not only do you get the pink noise generator turn it around and use the LED flashlight function . But don’t stop there as a bonus it is also is a 4000mAh power bank to charge your phone or power small devices in a pinch.
Zealot S1 Bicycle Portable Speaker.
Available on Amazon for under $30.
A 16GB Class 10 U1 microSDHC Flash Memory Card. We used a PNY 16GB micro SDHC memory card from Amazon, cost about $5.
• Unpackaged Zealot S1 Portable Speaker
• Plug provided microUSB cable into flashlight and plug into a charger (Charger not included) let charge fully.
• Download pink noise file from this link.
• copy pink noise file onto the root directory of microSD card
(You need a SD reader for a computer to do this, the TF card on the speaker is not accessible through the USB cable.
. Insert microSD card into flashlight microSD slot.