# MinaRing Prayer Companion ## Description Rigid-flex smart ring for Islamic prayer companion use, with compact BLE SoC, capacitive swipe electrodes, haptic feedback, rechargeable battery power, and body-worn BLE antenna constraints. ## Project Details - **Owner:** mustafamasody - **Created:** 6/7/2026 - **Last Updated:** 6/8/2026 - **Visibility:** Public ## Key Components ### ANT1 — [Generic Testpoint](https://www.flux.ai/jharwinbarrozo/generic-testpoint~esx.md) - Role Details: Antenna feed for ring BLE antenna; replace with final meander/FPC antenna geometry and tuning coupon - Role: RF Tuning / Matching - Testpoint Size: 0.5 **Pins:** - P1 ### E1 — [Generic Testpoint](https://www.flux.ai/jharwinbarrozo/generic-testpoint~esx.md) - Role: Sensing (Shunt) - Role Details: MPR121 ELE0 capacitive swipe electrode pad on flex band - Testpoint Size: 0.5 **Pins:** - P1 ### E2 — [Generic Testpoint](https://www.flux.ai/jharwinbarrozo/generic-testpoint~esx.md) - Testpoint Size: 0.5 - Role Details: MPR121 ELE1 capacitive swipe electrode pad on flex band - Role: Sensing (Shunt) **Pins:** - P1 ### E3 — [Generic Testpoint](https://www.flux.ai/jharwinbarrozo/generic-testpoint~esx.md) - Testpoint Size: 0.5 - Role Details: MPR121 ELE2 capacitive swipe electrode pad on flex band - Role: Sensing (Shunt) **Pins:** - P1 ### E4 — [Generic Testpoint](https://www.flux.ai/jharwinbarrozo/generic-testpoint~esx.md) - Role: Sensing (Shunt) - Role Details: MPR121 ELE3 capacitive swipe electrode pad on flex band - Testpoint Size: 0.5 **Pins:** - P1 ### M1 — [LCM0827A3038F](https://www.flux.ai/lcsc/lcm0827a3038f~kgq2.md) - Manufacturer Part Number: LCM0827A3038F - License: https://creativecommons.org/licenses/by/4.0/ - LCSC Part Number: C2759981 - Package or Case Code: VIBRATIONMOTOR-TH_LCM0827A3038F - Role Details: 8 mm vibration actuator placeholder; replace with exact Vybronics VG0832013D LRA footprint if provided. - Part Type: Micro Motor & Motor - Datasheet URL: https://www.lcsc.com/datasheet/C2759981.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=FlkNBAIDRQULVABfFAVZBgZVFVZYBgZSQ1NeBVIFQlExVlNeR1VeU1RXR1VWUjsOAxUeFF5JWBYZEEoKFBINSQcJGk4dAgUUFAk%3D - Symbol Style: parametric-v1 - JLCPCB Part Class: Extended Part - Manufacturer Name: LEADER(立得) - Role: Haptic Actuator **Pins:** - 1 [pin 1] - 2 [pin 2] ### TP_3V0 — [Generic Testpoint](https://www.flux.ai/jharwinbarrozo/generic-testpoint~esx.md) - Role Details: 3.0V target reference for SWD fixture - Testpoint Size: 0.5 - Role: Programming Pad **Pins:** - P1 ### TP_BAT- — [Generic Testpoint](https://www.flux.ai/jharwinbarrozo/generic-testpoint~esx.md) - Testpoint Size: 0.5 - Role Details: Single-cell LiPo negative pad to GND - Role: Battery Pad **Pins:** - P1 ### TP_BAT+ — [Generic Testpoint](https://www.flux.ai/jharwinbarrozo/generic-testpoint~esx.md) - Role Details: Single-cell LiPo positive pad to charger BATT - Role: Battery Pad - Testpoint Size: 0.5 **Pins:** - P1 ### TP_CHG- — [Generic Testpoint](https://www.flux.ai/jharwinbarrozo/generic-testpoint~esx.md) - Role Details: Ring external charging ground contact - Role: Charge Contact - Testpoint Size: 0.5 **Pins:** - P1 ### TP_CHG+ — [Generic Testpoint](https://www.flux.ai/jharwinbarrozo/generic-testpoint~esx.md) - Role Details: Ring external charging positive contact to MP2662 IN - Testpoint Size: 0.5 - Role: Charge Contact **Pins:** - P1 ### TP_GND — [Generic Testpoint](https://www.flux.ai/jharwinbarrozo/generic-testpoint~esx.md) - Testpoint Size: 0.5 - Role: Programming Pad - Role Details: Ground reference for SWD fixture **Pins:** - P1 ### TP_RESET — [Generic Testpoint](https://www.flux.ai/jharwinbarrozo/generic-testpoint~esx.md) - Testpoint Size: 0.5 - Role: Programming Pad - Role Details: nRF52 reset pad for programming fixture **Pins:** - P1 ### TP_SWDCLK — [Generic Testpoint](https://www.flux.ai/jharwinbarrozo/generic-testpoint~esx.md) - Role Details: nRF52 SWDCLK pad for manufacturing/programming fixture - Testpoint Size: 0.5 - Role: Programming Pad **Pins:** - P1 ### TP_SWDIO — [Generic Testpoint](https://www.flux.ai/jharwinbarrozo/generic-testpoint~esx.md) - Role Details: nRF52 SWDIO pad for manufacturing/programming fixture - Role: Programming Pad - Testpoint Size: 0.5 **Pins:** - P1 ### U1 — [nRF52833-QDAA-R](https://www.flux.ai/lcsc/nrf52833-qdaa-r~c702.md) - LCSC Part Number: C2895249 - Manufacturer Part Number: nRF52833-QDAA-R - Role Details: Nordic nRF52833 QFN target for compact ring-scale BLE; selected over nRF52840 for 5 mm package size. - Package or Case Code: QFN-40_L5.0-W5.0-P0.40-TL-EP3.6 - Manufacturer Name: NORDIC - Role: BLE SoC - JLCPCB Part Class: Extended Part **Pins:** - ANT [pin 24] - D- [pin 12] - D+ [pin 13] - DCC [pin 39] - DEC1 [pin 1] - DEC3 [pin 27] - DEC4 [pin 38] - DEC5 [pin 21] - DEC6 [pin 26] - DECUSB [pin 11] - P0.00_XL1 [pin 2] - P0.01_XL2 [pin 3] - P0.02_AIN0 [pin 32] - P0.03_AIN1 [pin 31] - P0.04_AIN2 [pin 4] - P0.05_AIN3 [pin 5] - P0.09_NFC1 [pin 22] - P0.10_NFC2 [pin 23] - P0.11 [pin 7] - P0.15 [pin 14] - P0.17 [pin 15] - P0.18_nRESET [pin 16] - P0.20 [pin 17] - P0.28_AIN4 [pin 33] - P0.29_AIN5 [pin 34] - P0.30_AIN6 [pin 35] - P0.31_AIN7 [pin 36] - P1.09 [pin 6] - SWDCLK [pin 20] - SWDIO [pin 19] - VBUS [pin 10] - VDD [pin 18] - VDD [pin 30] - VDD [pin 8] - VDD [pin 40] - VDDH [pin 9] - VSS [pin 37] - VSS [pin 41] - VSS_PA [pin 25] - XC1 [pin 28] - XC2 [pin 29] ### U2 — [MPR121QR2](https://www.flux.ai/jecstronic/mpr121qr2~65y.md) - Part Type: Integrated Circuit - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.nxp.com/docs/en/data-sheet/MPR121.pdf - Manufacturer Part Number: MPR121QR2 - Role Details: MPR121 QFN 3x3 mm, I2C address 0x5B, four electrodes used for swipe detection; IQS7211 noted as future swap if library part is created. - Manufacturer Name: NXP USA Inc. - Role: Capacitive Touch Controller **Pins:** - *IRQ [pin 1] - ADDR [pin 4] - ELE0 [pin 8] - ELE1 [pin 9] - ELE10 [pin 18] - ELE11 [pin 19] - ELE2 [pin 10] - ELE3 [pin 11] - ELE4 [pin 12] - ELE5 [pin 13] - ELE6 [pin 14] - ELE7 [pin 15] - ELE8 [pin 16] - ELE9 [pin 17] - HTAB [pin HTAB] - REXT [pin 7] - SCL [pin 2] - SDA [pin 3] - VDD [pin 20] - VREG [pin 5] - VSS [pin 6] ### U3 — [DRV2605LDGSR](https://www.flux.ai/adrian95/drv2605ldgsr~msw.md) - Manufacturer Name: Texas Instruments - Manufacturer Part Number: DRV2605LDGSR - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: DRV2605L I2C haptic driver at 0x5A; drives LRA between OUT+ and OUT-. - Role: Haptic Driver - Part Type: Integrated Circuit - Datasheet URL: https://www.ti.com/lit/ds/symlink/drv2605l.pdf **Pins:** - EN [pin 5] - GND [pin 8] - IN/TRIG [pin 4] - OUT- [pin 9] - OUT+ [pin 7] - REG [pin 1] - SCL [pin 2] - SDA [pin 3] - VDD [pin 10] - VDD/NC [pin 6] ### U4 — [MP2662](https://www.flux.ai/monolithicpower/mp2662~k9.md) - Product Info Url: https://www.monolithicpower.com/en/catalog/product/view/id/3082?utm_source=ultralibrarian&utm_medium=component_search&utm_campaign=listing - Role Details: Single-cell charger/power path for ring contact pads; charge current to be set for small 10–30 mAh cell after battery selection. - Manufacturer Name: Monolithic Power Systems - Product Image Url: https://www.monolithicpower.com/pub/media/catalog/product/m/p/mp2662.jpg - Role: Battery Charger - Datasheet URL: https://www.monolithicpower.com/en/documentview/productdocument/index/version/2/document_type/Datasheet/lang/en/sku/MP2662 - Package or Case Code: WLCSP-9_1p75MMx1p75MM_MP2662_MNP - Manufacturer Part Number: MP2662 **Pins:** - BATT [pin A3] - GND [pin C3] - IN [pin A1] - INT [pin B2] - NTC [pin B1] - SCL [pin C2] - SDA [pin C1] - SYS [pin A2] - VDD [pin B3] ### U5 — [MCP1700x-300xxTT](https://www.flux.ai/kicad-part-library/mcp1700x-300xxtt~zl.md) - Datasheet URL: http://ww1.microchip.com/downloads/en/DeviceDoc/20001826D.pdf - Role Details: 250 mA low-Iq regulator; 1 uF input and output capacitors required; selected for wearable sleep current. - Manufacturer Name: Microchip Technology Inc. - Manufacturer Part Number: MCP1700x-300xxTT - Package or Case Code: SOT-23 - Role: 3.0V LDO **Pins:** - GND [pin 1] - VI [pin 3] - VO [pin 2] ### Y1 — [CS06654-32M](https://www.flux.ai/jecstronic/cs06654-32m~6j.md) - Role Details: 32 MHz HFXO crystal, 8 pF CL per Nordic reference; exact smaller 1612 package should be sourced for final ring build - Part Type: Oscillator - Datasheet URL: https://www.ndk.com/images/products/catalog/c_NX2016SA_e.pdf - Role: Timing - Manufacturer Name: NDK America, Inc. - Manufacturer Part Number: CS06654-32M - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] ### Y2 — [TF325J32K7680](https://www.flux.ai/adrian95/tf325j32k7680~xbh.md) - Datasheet URL: https://www.mouser.com/datasheet/2/96/008-0354-0_A_TF32_Series-1160869.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Role: Timing - Part Type: Oscillator - Manufacturer Name: CTS - Role Details: 32.768 kHz optional LFXO crystal, 9 pF CL per Nordic reference - Manufacturer Part Number: TF325J32K7680 - Package or Case Code: TF322J32K7680R **Pins:** - ~ [pin 2] - ~ [pin 1] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/mustafamasody/minaring-prayer-companion~5q](https://www.flux.ai/mustafamasody/minaring-prayer-companion~5q).* --- *Generated from [https://www.flux.ai/mustafamasody/minaring-prayer-companion~5q](https://www.flux.ai/mustafamasody/minaring-prayer-companion~5q)*