Largo & Picos
Largo
I've been listening to some lo‑fi beats lately and thinking about how a homemade synth could add a new texture—what if we repurposed a broken microwave or toaster into a sound module?
Picos
Yeah, go for it—microwave transformer + ESP32 = instant oscillators, toaster heating element + PWM = DIY resistor ladder for synth. 1. Strip the microwave, get the high‑voltage transformer (HV). 2. Wire the secondary to a MOSFET gate, use a 3‑phase PWM from the ESP32 to toggle it. 3. The resulting RF pulses can be captured with a cheap RF detector or an FM tuner, then fed into the DAC of the ESP32 to digitize and modulate. 4. For the toaster: cut the heating element into a series of small resistive strips, connect them to a shift register + PWM, let the temperature swing generate a low‑freq “warm” tone. 5. Loop the PWM into a PLL or use a 555 timer for a simple 12‑bit wavetable. 6. Load the code, tweak the duty cycle, get that lo‑fi hiss. 7. Bonus: mount the whole thing on a breadboard, add a headphone jack, and you’ve got a rogue synth that’s basically a toaster‑microwave hybrid. Just keep the high‑voltage out of your eyes and don’t forget to log the code on GitHub so you can blame the community when it sparks.
Largo
That sounds wild, but I’m already worrying about the safety of that high‑voltage transformer. Maybe start with the toaster part first, get a simple low‑freq tone, and see if the idea feels right before you jump into the microwave. Keep a log anyway—sometimes the only way to catch a spark is to write it down before it happens.
Picos
Totally feel you—start with the toaster, just hook the heating element to a PWM pin on a 3‑phase controller and let the heat ripple be your oscillator. 1. Cut the element into a few segments, 2. Connect them to a shift register, 3. Drive with a simple 500‑Hz PWM, 4. Capture the sound with the ESP32 ADC, 5. Print the waveform to serial or save it on an SD card. Log every resistor value and every duty cycle tweak. When you’re happy with the low‑freq vibe, you can bring the microwave transformer into the mix, but keep the high voltage isolated and the code in the repo. That way you’ll catch any spark before it hits the bench.
Largo
That plan sounds more grounded—focusing on the toaster’s resistance first keeps the risks low and the learning curve smooth. I’ll log each tweak, but I’ll also pause to listen; sometimes the best notes come when the circuit isn’t humming perfectly, just humming enough to remember.
Picos
Cool, go for it—wire the toaster element to a 555 timer in astable mode, tweak the caps, listen to the wobble, log the values, and keep the code on GitHub. The first few clicks will already feel like a glitchy lo‑fi beat, and if you’re not happy you can just swap a resistor or change the duty cycle. Stay curious, keep it messy, and if it sparks, you’ll have the log to blame.
Largo
Sounds like a solid first step—just make sure the timer’s output stays within the ESP32’s safe input range, and maybe test the signal with a cheap oscilloscope before hooking it to the audio jack. I’ll keep the logs tight and the code on GitHub, just in case. Let's see what kind of lo‑fi hiss we can coax out of a toaster.
Picos
Nice, that’s the vibe—keep the 555 output <3.3V, buffer with a MOSFET if you wanna be extra safe, then pop the analog into the ESP32 ADC, grab the sample rate, and you’ve got a homemade lo‑fi hiss. Log the capacitor values, the duty cycle, the temperature—those weird, imperfect sounds are the gold. Happy hacking!
Largo
Sounds like a good plan—keep the logs tight and stay in that sweet spot where the hiss is just enough to feel alive. Happy tinkering.
Picos
Glad you’re on board—let’s keep the logs messy, the code open source, and the hiss sweet. Happy hacking!