caspar| Quantity | Component name | |
| 1 | × | ST25DV04KC NFC energy harvesting chip, SOIC-8 |
| 1 | × | TSM260P02CX P-ch MOSFET, power switch, SOT-23 |
| 1 | × | MMBT3904 NPN transistor, latch, SOT-23 |
| 1 | × | Trimmer capacitor, antenna tuning JZ400 |
| 1 | × | Raspberry Pi Pico W |
Harvesting NFC Energy to Transmit Commands
Using NFC RF energy harvested from a phone tap to submit commands and start a microcontroller. No standby power.