Review on 🔥 Easycargo 12 Pack TO-220 Heatsink + Insulator/Mounting Kits for LM317 LM317t L7805 L7812 L78XX Voltage Regulator, IRF Z44N 3205 520N 630 1404 MOSFET Transistor - Silver 20mm x 15mm x 10mm (12 Pack) by Kevin Henry

Most of my ESP32 circuits are normally inactive, so no heatsinks are needed. I recently built a circuit using a generic ESP8266MOD D1 Mini driving 8 strings of 50 RGB LEDs through rich visual patterns. The 7805, which supplies 5V for a miniature device with a regulated 12V supply, got noticeably warm, not very hot but annoying nonetheless. Screwing in one of these heatsinks and a gasket with the enclosed screw, washers and insert was done quickly. After that, the radiator/controller is barely warmer than skin temperature.