# NSS\-Bridge\-3

## Description

Wearable coin\-cell peripheral nerve\-field stimulator reverse\-engineering schematic with boost stimulation rail, micro\-USB, electrode outputs, and bottom return ring contact\.

## Project Details

- **Owner:** inbetweenwhereai
- **Created:** 7/17/2026
- **Last Updated:** 8/25/2026
- **Visibility:** Public
- **Domain:** Medical
- **Power Requirements:** Battery
- **Human Interface:** Wearable

## Key Components

### B1 — [Generic Coin Cell Holder](https://flux.ai/jharwinbarrozo/generic-coin-cell-holder~w7c.md)

- Voltage: 3V
- Role Details: Coin\-cell spring clip on bottom side supplying VBAT\.
- Part Type: Connector
- Role: Energy Storage
- Functional Group: Power Input
- Package: 10mm\_fp

**Pins:**
- NEG [pin N1]
- POS [pin P2]
- POS [pin P1]

### D1 — [1N914BWT](https://flux.ai/jecstronic/1n914bwt~blk.md)

- License: https://creativecommons\.org/licenses/by/4\.0/
- Role Details: SOD\-523\-looking part in output network; confirm diode vs LED and polarity before relying on schematic\.
- Role: Rectification
- Functional Group: Electrode Outputs
- Manufacturer Part Number: 1N914BWT
- Datasheet URL: https://rocelec\.widen\.net/view/pdf/bnxdzepaue/ONSM\-S\-A0003584797\-1\.pdf?t\.download=true&u=5oefqw
- Manufacturer Name: onsemi
- Part Type: Diode

**Pins:**
- A [pin 2]
- K [pin 1]

### D2 — [1N914BWT](https://flux.ai/jecstronic/1n914bwt~blk.md)

- License: https://creativecommons\.org/licenses/by/4\.0/
- Role Details: SOD\-523\-looking part in output network; confirm diode vs LED and polarity before relying on schematic\.
- Manufacturer Part Number: 1N914BWT
- Datasheet URL: https://rocelec\.widen\.net/view/pdf/bnxdzepaue/ONSM\-S\-A0003584797\-1\.pdf?t\.download=true&u=5oefqw
- Manufacturer Name: onsemi
- Role: Rectification
- Part Type: Diode
- Functional Group: Electrode Outputs

**Pins:**
- A [pin 2]
- K [pin 1]

### D3 — [1N914BWT](https://flux.ai/jecstronic/1n914bwt~blk.md)

- Functional Group: Electrode Outputs
- License: https://creativecommons\.org/licenses/by/4\.0/
- Role Details: SOD\-523\-looking part in output network; confirm diode vs LED and polarity before relying on schematic\.
- Role: Rectification
- Manufacturer Part Number: 1N914BWT
- Datasheet URL: https://rocelec\.widen\.net/view/pdf/bnxdzepaue/ONSM\-S\-A0003584797\-1\.pdf?t\.download=true&u=5oefqw
- Manufacturer Name: onsemi
- Part Type: Diode

**Pins:**
- A [pin 2]
- K [pin 1]

### E1 — [TestPoint THTPad 1\.0x1\.0mm Drill0\.5mm](https://flux.ai/adrian95/testpoint-thtpad-d1p0mm-drill-0p5mm~dwy.md)

- Functional Group: Electrode Outputs
- Part Type: Connector
- Role: Protection
- Role Details: Plated through\-hole electrode pad E1\.

**Pins:**
- 1

### E2 — [TestPoint THTPad 1\.0x1\.0mm Drill0\.5mm](https://flux.ai/adrian95/testpoint-thtpad-d1p0mm-drill-0p5mm~dwy.md)

- Role Details: Plated through\-hole electrode pad E2\.
- Functional Group: Electrode Outputs
- Role: Protection
- Part Type: Connector

**Pins:**
- 1

### E3 — [TestPoint THTPad 1\.0x1\.0mm Drill0\.5mm](https://flux.ai/adrian95/testpoint-thtpad-d1p0mm-drill-0p5mm~dwy.md)

- Role: Protection
- Functional Group: Electrode Outputs
- Part Type: Connector
- Role Details: Plated through\-hole electrode pad E3\.

**Pins:**
- 1

### J1 — [USB Micro B](https://flux.ai/jharwinbarrozo/usb-micro-b~t8p.md)

- Role: Protection
- Datasheet URL: https://www\.molex\.com/pdm\_docs/sd/473460001\_sd\.pdf
- Manufacturer Name: Molex
- Role Details: Micro\-USB\-B receptacle on bottom side; only power/shell nets wired from provided brief\.
- Manufacturer Part Number: 0473460001
- Part Type: USB B
- Functional Group: External Interface

**Pins:**
- D\- [pin 2]
- D\+ [pin 3]
- GND [pin 5]
- ID [pin 4]
- S1 [pin 6]
- S2 [pin 7]
- S3 [pin 8]
- S4 [pin 9]
- S5 [pin 10]
- S6 [pin 11]
- VBUS [pin 1]

### RING — [Generic Testpoint](https://flux.ai/jharwinbarrozo/generic-testpoint~esx.md)

- Role Details: Bottom exposed gold ring contact; intended net name RING with stitching vias in layout\.
- Testpoint Size: 0\.5
- Functional Group: Return Electrode
- Part Type: Test Point
- Role: Protection

**Pins:**
- P1 [pin 1]

### U1 — [SRV05\-4LC\-P\-T7](https://flux.ai/lcsc/srv05-4lc-p-t7~g254.md)

- LCSC Part Number: C561423
- Role Details: 6\-pin unknown small IC; marking T18 AU8 2DZ\. Placeholder only; exact identity/pinout must be confirmed by trace mapping\.
- Package or Case Code: SOT\-23\-6\_L2\.9\-W1\.6\-P0\.95\-LS2\.7\-BR
- Role: Timing
- Functional Group: Timing / Control
- Manufacturer Name: PROTEK
- Manufacturer Part Number: SRV05\-4LC\-P\-T7

**Pins:**
- 1 [pin 1]
- 2 [pin 2]
- 3 [pin 3]
- 4 [pin 4]
- 5 [pin 5]
- 6 [pin 6]

### U2 — [UCC28C52DGKR](https://flux.ai/adrian95/ucc28c52dgkr~2bb.md)

- Role: Power Conversion
- Manufacturer Name: Texas Instruments
- Datasheet URL: https://www\.ti\.com/lit/ds/symlink/ucc28c50\.pdf
- Manufacturer Part Number: UCC28C52DGKR
- License: https://creativecommons\.org/licenses/by/4\.0/
- Part Type: Integrated Circuit
- Functional Group: Boost Stim Rail
- Role Details: Unknown original marking LBVC B041; used as an 8\-pin controller placeholder until exact pinout is identified\.

**Pins:**
- COMP [pin 1]
- CS [pin 3]
- FB [pin 2]
- GND [pin 5]
- OUT [pin 6]
- RT/CT [pin 4]
- VDD [pin 7]
- VREF [pin 8]

*The full schematic, PCB layout, bill of materials, and interactive design are available at [https://flux\.ai/inbetweenwhereai/nss\-bridge\-3\~03](https://flux.ai/inbetweenwhereai/nss-bridge-3~03).*

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*Generated from [https://flux\.ai/inbetweenwhereai/nss\-bridge\-3\~03](https://flux.ai/inbetweenwhereai/nss-bridge-3~03)*