Sounds like a fun distraction. I’ll grab the radio, check the transistor specs, and solder a little audio board to the keyboard’s key‑scan circuitry. I’ll have to write a tiny firmware stub that triggers the radio to play a countdown whenever a non‑ASCII key fires. Just make sure you have the right type of radio for the frequency, or it’ll just go off like a busted relic. Let’s get the parts out of the attic and see what we can wire up.

All right, I’ll pull the batteries and the 5 V regulator out of the old radio, strip the speaker wire, and wire it to the keyboard’s 5 V rail with a safety fuse. I’ll put a small MOSFET in between so I can flip the audio on and off. For the key‑scan hack, I’ll hook a 1‑k pull‑up on one of the row pins, monitor it in a quick firmware loop, and when a stray key press lands on that pin I’ll toggle the MOSFET. If it starts sending the whole keyboard’s scan matrix to the radio, that’ll be a pretty convincing “new anti‑phishing” feature. Let’s crack the attic open and get the parts ready.

Sounds good—just remember to keep the fuse rating at 1 A, and I’ll add a little diode to keep the MOSFET from frying if the rail spikes. I’ll also tape a note on the radio so we know where the power line is in case we need to cut it for a quick “maintenance.” Once we’re in the attic, I’ll set up a quick breadboard test before wiring it to the real keyboard. Then we’ll wait for the first mis‑typed key and watch the retro countdown blast through the dusty speaker. Let's do it.

All right, let’s fire up the attic lights and get the breadboard ready. I’ll double‑check the MOSFET gate threshold and add a small capacitor for debounce. Once it’s wired, we’ll hit a few keys to see that countdown sputter out. I’ll be ready to tweak the circuit if it starts blowing the fuse. Let’s make some vintage noise.