# Then Scarlet TV Glasses ## Description RF energy-harvesting powered BLE (AEM10941 + supercap + nRF52810) ## Project Details - **Owner:** pratik17 - **Created:** 2/8/2026 - **Last Updated:** 2/8/2026 - **Visibility:** Public - **System Architecture:** ```mermaid flowchart TD SMA[SMA Edge Mount] --> RF_IN[RF_IN 50ohm microstrip] RF_IN --> DIODE[SMS7630 Schottky] DIODE --> RECT_DC[RECT_DC] RECT_DC --> PMU[AEM10941 PMU] PMU --> VSTOR[VSTOR] VSTOR --> SC[Supercapacitor 0.33F] PMU --> VOUT[VOUT regulated] VOUT --> BLE[nRF52810 Module] BLE --> SWD[SWD Pads] BLE --> LED[Status LED] GND[GND Plane] --- SMA GND --- DIODE GND --- PMU GND --- BLE ``` ## Key Components ### Cmatch1 — [Generic Capacitor](https://www.flux.ai/jharwinbarrozo/generic-capacitor~1d.md) - Package: SMD_0402_1005Metric - Part Type: Non-Polarized Capacitor - Role Details: Pi-match shunt capacitor at SMA input side; high-Q 0402; tune value during bring-up - Role: RF Match - Capacitance: 0.8pF **Pins:** - P1 [pin 1] - P2 [pin 2] ### Cmatch2 — [Generic Capacitor](https://www.flux.ai/jharwinbarrozo/generic-capacitor~1d.md) - Package: SMD_0402_1005Metric - Part Type: Non-Polarized Capacitor - Role: RF Match - Role Details: Pi-match shunt capacitor at rectifier input side; high-Q 0402; DNI/DNF option for tuning - Capacitance: 0.8pF **Pins:** - P1 [pin 1] - P2 [pin 2] ### conn1 — [01x06 smd pads 1.27mm](https://www.flux.ai/tyler-s/01x06-smd-pads-1p27mm~5s.md) - Manufacturer Name: Generic - Role: Test Pads - Role Details: SWDIO/SWDCLK/RESET/VOUT/GND plus spare pad - Manufacturer Part Number: 01x06 smd pads 1.27mm - Package: SMD pads 1.27mm **Pins:** - P1 - P2 - P3 - P4 - P5 - P6 ### D2 — [SMS7630-079LF](https://www.flux.ai/jecstronic/sms7630-079lf~y2g.md) - Part Type: Diode - Manufacturer Name: Skyworks Solutions Inc. - Manufacturer Part Number: SMS7630-040LF - Datasheet URL: https://www.skyworksinc.com/-/media/A36775836A4E4BA8A92104088692424F.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Role: Rectifier - Role Details: RF to DC rectifier diode from SMA (requested SMS7630-040LF; library lacked exact MPN - using SMS7630-079LF temporarily) **Pins:** - A [pin 2] - K [pin 1] ### J1 — [142-0701-801](https://www.flux.ai/adrian95/142-0701-801~8ox.md) - Package or Case Code: 142-0701-851 - Role: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Connector Type: RF / Coaxial Connectors - Datasheet URL: http://www.farnell.com/datasheets/2048966.pdf - Manufacturer Part Number: 142-0701-801 - Role Details: Edge-mount SMA RF input - Part Type: Connector - Manufacturer Name: Cinch Connectivity Solutions **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] ### LED1 — [LED 0603 (1608 Metric)](https://www.flux.ai/jharwinbarrozo/generic-led-0603-1608-metric~yk.md) - Role Details: Status LED driven by nRF52810 GPIO - Part Type: LED - Manufacturer Part Number: LTST-C190GKT - Role: Indicator - Package: 0603 - Manufacturer Name: Lite-On **Pins:** - A [pin 2] - K [pin 1] ### Lmatch — [Generic Inductor](https://www.flux.ai/jharwinbarrozo/generic-inductor~wlv.md) - Part Type: Inductor - Package: SMD_0402_1005Metric - Role Details: Pi-match series inductor; high-Q 0402; may be replaced with 0 ohm jumper for bypass during tuning - Role: RF Match - Inductance: 3.9nH **Pins:** - P1 [pin 1] - P2 [pin 2] ### SW1 — [DS04-254-2-01BK-SMT](https://www.flux.ai/jecstronic/ds04-254-2-01bk-smt~t2.md) - Manufacturer Name: CUI Devices - Part Type: Switch - Package: SMD - Manufacturer Part Number: DS04-254-2-01BK-SMT - Role Details: SPST slide switch between VOUT and VOUT_SW for U2 power gating. - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.cuidevices.com/product/resource/ds04-254-smt.pdf - Role: Power Switch **Pins:** - ~ [pin 1B] - ~ [pin 1A] ### U1 — [AEM10941](https://www.flux.ai/nico/aem10941~9a.md) - Datasheet URL: https://e-peas.com/wp-content/uploads/2022/09/e-peas-AEM10941-datasheet-solar-energy-harvesting.pdf - Part Type: Integrated Circuit - Manufacturer Part Number: AEM10941 - Role: PMU - Manufacturer Name: E-Peas - Role Details: Energy harvesting power management per reference design - Package: QFN-28 - Pin Role: HVOUT Power Output **Pins:** - BAL [pin 15] - BATT [pin 16] - BOOST [pin 1] - BUCK [pin 3] - BUFSRC [pin 27] - CFG[0] [pin 6] - CFG[1] [pin 5] - CFG[2] [pin 4] - ENHV [pin 12] - ENLV [pin 18] - FB_COLD [pin 26] - FB_HV [pin 13] - FB_PRIM_D [pin 9] - FB_PRIM_U [pin 10] - GND [pin 29] - HVOUT [pin 14] - LVOUT [pin 11] - PRIM [pin 17] - SELMPP[0] [pin 8] - SELMPP[1] [pin 7] - SET_CHRDY [pin 23] - SET_OVCH [pin 22] - SET_OVDIS [pin 24] - SRC [pin 25] - STATUS[0] [pin 21] - STATUS[1] [pin 20] - STATUS[2] [pin 19] - SWBOOST [pin 28] - SWBUCK [pin 2] ### U2 — [nRF52810-QCAA-R](https://www.flux.ai/lcsc/nrf52810-qcaa-r~xpg0.md) - LCSC Part Number: C519278 - Part Type: RF Transceiver ICs - Package: QFN-32 - Package or Case Code: QFN-32_L5.0-W5.0-P0.50-BL-EP3.8 - Manufacturer Name: NORDIC - Role: BLE - JLCPCB Part Class: Extended Part - Manufacturer Part Number: nRF52810-QCAA-R - Role Details: nRF52810 BLE SoC powered from VOUT **Pins:** - ANT [pin 19] - DCC [pin 31] - DEC1 [pin 1] - DEC2 [pin 21] - DEC3 [pin 22] - DEC4 [pin 30] - EP [pin 33] - P0.00/XL1 [pin 2] - P0.01/XL2 [pin 3] - P0.04/AIN2 [pin 4] - P0.05/AIN3 [pin 5] - P0.06 [pin 6] - P0.09 [pin 7] - P0.10 [pin 8] - P0.12 [pin 10] - P0.14 [pin 11] - P0.15 [pin 12] - P0.16 [pin 13] - P0.18 [pin 14] - P0.20 [pin 15] - P0.21/nRESET [pin 16] - P0.25 [pin 26] - P0.28/AIN4 [pin 27] - P0.30/AIN6 [pin 28] - SWDCLK [pin 17] - SWDIO [pin 18] - VDD [pin 25] - VDD [pin 9] - VDD [pin 32] - VSS [pin 29] - VSS [pin 20] - XC1 [pin 23] - XC2 [pin 24] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/pratik17/then-scarlet-tv-glasses~he](https://www.flux.ai/pratik17/then-scarlet-tv-glasses~he).* --- *Generated from [https://www.flux.ai/pratik17/then-scarlet-tv-glasses~he](https://www.flux.ai/pratik17/then-scarlet-tv-glasses~he)*