Idiot Christmas Light Controller
Griswold may have needed an nuclear power plant for his lights, but his didn’t blink. Not enough.
Projects
Big Girl Audio – Audio Power Amplifier
I became intrigued with the 200W+ audio amplifiers on Amazon for $80 or so on Amazon. I did a little digging and found that some were based on a TI TPA3255 chip. I picked up a few MPN: TPA3255DDV and went to town. I basically lifted this schematic directly from the datasheet so it wasn’t … Read more
POWER INVERTER IN DQ REFERENCE FRAME
The task: Take a DC boost converter controlled with with a PID loop. Input a 60Hz sine wave as the setpoint. This creates a 60Hz sine wave with a DC offset. Make another identical DC boost converter and slam them together across a resistive load. (See schematic). The end result is the DC voltage is … Read more
Reading Light Bar
Requirements: This was a basic project. The ESP32 is overkill for this, but I had it on hand. For linear faders that are normally used on a mixing console create voltage dividers that are read by the ADC on the ESP32. The light is dimmed with standard PWM and MOSFETs. Fun artifact. My son wanted … Read more
Low Power Audio Amplifier
I needed a low power audio amplifier for my home audio setup. Nothing crazy. I basically wanted to match what a car stereo head unit could do. I didn’t want to fiddle with large power and I wanted something cheap. I had done plenty of PCBs for manipulating audio signals, but I had never tried … Read more