Quantity   Component name
1 × Particle Photon
1 × Traco Power TSR-1-2450 DC/DC Step-Down Converter
1 × 1N4747 Zener Diode, 20V, 1 Watt
1 × 1000uF 35V Electrolytic Capacitor
1 × 0.1uF 50V Ceramic Capacitor
1 × 150uH RF Choke, 4.2Ω, 175mA max
1 × 1KΩ Resistor
1 × 220KΩ Resistor
1 × 22KΩ Resistor
1 × In-line fuse holder and 250mA fuse
1 × Waterproof box (with silicone rubber seal)