Frekvens Ikea panel hack with Arduino Nano + max4466 + FHT

Frekvens from Ikea is a great little toy, but it the graphics that it displays is more than just dissapointing. Luckily enough someone already hacked Frekvens:
https://github.com/frumperino/Frekven...
   • IKEA Frekvens LED panel hacking - preview  

Although using fancier Arduino. I started off with logic shifters, but in the end it turned out it was broken. In the time of Covid decided not to order anything new and try directly with the Nano. Great thing VCC is connected to 5V input on Nano, but the IKEA power supply only gives around 3.8V, so already less than 5V. The logic output on Nano does not seem to be scaled up, so I decided to give it a try. It worked. It actually worked also when connected to USB, but here I connected it over a usb dongle which shows the current drawn. Do not set full brightness on the whole panel - you will either fry your USB in your PC or something else...

After making sure the LED can be steered by Arduino Nano I started to see what can I do with amplified microphone. Here - if you just want the level of sound to control the graphics - it's fairly straightforward. If you want to visualize different frequencies you will have to tinker with registers to speed up sampling and FHT.

If anyone's interested I might share more on how to connect and the code I mostly copy-pasted from other sources (such us mentioned fumperino - make sure to check out his video)

Disclaimer: this is no recommendation nor instruction. I take no responsibility nor do I encourage over your own attempts.