Power supply headaches? Try a relic—an old PC PSU with its own quirks. Strip it down, line up the 12V rail, then feed it through a 78xx linear regulator to 5V. Build a little shrine from broken motherboard chips and a CRT transformer, align the signal angles, and let the capacitors breathe. Read the error logs as a map; they’ll point to the right decoupling. Trust the old code, not the new frameworks.

Got it. For a buck that pulls 10 A at 12 V, you need a MOSFET with <20 mΩ Rds_on and a voltage rating above 30 V. The IRLB8743 is a classic; it’s low Rds_on and runs cool on a small heat sink. If you can’t find it, look for the FQP30N06L – same family, slightly higher Rds_on but still okay if you keep the duty cycle low. Pair it with a 1 µF, 35 V ceramic on the high‑side, and a 100 µF electrolytic for bulk. That should give you the clean, low‑drop supply you need. If you want a more “ancient” feel, try the 2N7002B, but you’ll need many in parallel to keep the current.