Quantity   Component name
1 × STM32F103C8T6 Minimum System Development Board The so-called "blue pill"
1 × 40 pin, 600 mil DIP socket
1 × TSOP38238 38 kHz IR receiver
1 × TSAL6400 IR LED, 50° beam
1 × 120 Ω resistor
1 × 1.2×2.3 in. piece of perfboard
1 × 3D-printed enclosure