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  Hello, Element 14! In this blog post I wanted to show you this VU Meter I made using an Attiny 85, and a WS2812b LED strip.   Here is the schematic of the circuit: This circuit basically just taps into an audio signal from a 3.5 mm jack, which gets converted to a mono signal, and then goes to an amplifier with a gain of 10 which then, goes to an analog input of the Attiny. The potentiometer is for adjusting the input level.   Originally I was going to use an Arduino Uno ...
  Hello, Element 14!   In this blog post, I'll be showing this AC timer switch I made.   It basically uses the Arduino as a timer, and you can set this time using the buttons on the top. Pin 10 of the Arduino is connected to an IRFZ44n mosfet that controls the relay. And, of course the relay is what switches the outlet on the front on, and off.   When you startup the device, it'll ask you to set the timer.     Once you set the timer, it'll ask you if you wa ...