# Days Since Counter

## Description

Welcome to your new project\. Imagine what you can build here\.

## Project Details

- **Owner:** brianbenchoff
- **Created:** 8/26/2026
- **Last Updated:** 9/1/2026
- **Visibility:** Public
- **Copies:** 1

## Key Components

### J1 — [54\-00164](https://flux.ai/adrian95/54-00164~yf4.md)

- Datasheet URL: https://tensility\.s3\.us\-west\-2\.amazonaws\.com/uploads/pdffiles/54\-00164\.pdf
- Functional Group: Power Input
- Role Details: Bottom\-side board\-edge DC barrel power input
- Part Type: Connector
- Symbol Style: parametric\-v1
- Manufacturer Name: Tensility International Corp
- Package or Case Code: TENSILITY\_54\-00164
- Manufacturer Part Number: 54\-00164
- Role: Power Conversion

**Pins:**
- \~ [pin A1]
- \~ [pin A2]
- \~ [pin C]
- \~ [pin B]

### J2 — [Pin Header 01x06 2\.54mm Vertical](https://flux.ai/adrian95/pin-header-01x06-2p54mm-vertical~lzd.md)

- Role: Logic\-level Shifting
- Functional Group: Expansion Headers
- License: https://creativecommons\.org/licenses/by/4\.0/
- Part Type: Connector
- Role Details: 1x6 2\.54 mm header: 1 \+12V, 2 GND, 3 \+5V, 4 DATA, 5 SRCK, 6 RCK

**Pins:**
- Pin\_1 [pin 1]
- Pin\_2 [pin 2]
- Pin\_3 [pin 3]
- Pin\_4 [pin 4]
- Pin\_5 [pin 5]
- Pin\_6 [pin 6]

### J3 — [Pin Header 01x06 2\.54mm Vertical](https://flux.ai/adrian95/pin-header-01x06-2p54mm-vertical~lzd.md)

- Role Details: 1x6 2\.54 mm header: 1 \+12V, 2 GND, 3 \+5V, 4 DATA, 5 SRCK, 6 RCK
- License: https://creativecommons\.org/licenses/by/4\.0/
- Part Type: Connector
- Role: Logic\-level Shifting
- Functional Group: Expansion Headers

**Pins:**
- Pin\_1 [pin 1]
- Pin\_2 [pin 2]
- Pin\_3 [pin 3]
- Pin\_4 [pin 4]
- Pin\_5 [pin 5]
- Pin\_6 [pin 6]

### U1 — [Raspberry Pi Pico 2 W Shield SMD](https://flux.ai/vasy_skral/raspberry-pi-pico-2-w-shield-smd~8dk.md)

- Functional Group: Controller
- Part Type: Microcontroller
- Role Details: Raspberry Pi Pico 2 W module; bottom\-side SMD/castellated connections only\. VBUS intentionally unconnected: USB\-only pin; design is powered through VSYS
- Manufacturer Part Number: Raspberry Pi Pico 2
- Role: Main Controller
- Symbol Style: Parametric
- Manufacturer Name: Raspberry Pi Foundation
- Datasheet URL: https://datasheets\.raspberrypi\.com/picow/pico\-2\-w\-datasheet\.pdf

**Pins:**
- 3V3 [pin 36]
- 3V3\_EN [pin 37]
- ADC\_VREF [pin 35]
- AGND [pin 33]
- GND [pin 8]
- GND [pin 23]
- GND [pin 28]
- GND [pin 3]
- GND [pin 42]
- GND [pin 13]
- GND [pin 38]
- GND [pin 18]
- GPIO0 [pin 1]
- GPIO1 [pin 2]
- GPIO10 [pin 14]
- GPIO11 [pin 15]
- GPIO12 [pin 16]
- GPIO13 [pin 17]
- GPIO14 [pin 19]
- GPIO15 [pin 20]
- GPIO16 [pin 21]
- GPIO17 [pin 22]
- GPIO18 [pin 24]
- GPIO19 [pin 25]
- GPIO2 [pin 4]
- GPIO20 [pin 26]
- GPIO21 [pin 27]
- GPIO22 [pin 29]
- GPIO26\_ADC0 [pin 31]
- GPIO27\_ADC1 [pin 32]
- GPIO28\_ADC2 [pin 34]
- GPIO3 [pin 5]
- GPIO4 [pin 6]
- GPIO5 [pin 7]
- GPIO6 [pin 9]
- GPIO7 [pin 10]
- GPIO8 [pin 11]
- GPIO9 [pin 12]
- RUN [pin 30]
- SWCLK [pin 41]
- SWDIO [pin 43]
- TP1 [pin TP1]
- TP2 [pin TP2]
- TP3 [pin TP3]
- TP4 [pin TP4]
- TP5 [pin TP5]
- TP6 [pin TP6]
- VBUS [pin 40]
- VSYS [pin 39]

### U4 — [LM1117IMPX\-5\.0/NOPB](https://flux.ai/jecstronic/lm1117impx-5p0nopb~ao5.md)

- Role: Power Conversion
- Manufacturer Part Number: LM1117IMPX\-5\.0/NOPB
- Datasheet URL: https://www\.ti\.com/lit/ds/symlink/lm1117\.pdf
- Role Details: LM1117 fixed 5 V regulator in SOT\-223 SMD package; input voltage and load require thermal verification before wiring
- Part Type: Integrated Circuit
- Manufacturer Name: Texas Instruments
- Functional Group: 5 V Power Regulation
- License: https://creativecommons\.org/licenses/by/4\.0/

**Pins:**
- GND [pin 1]
- VI [pin 3]
- VO [pin 4]
- VO [pin 2]

### U5 — [SN74AHCT125DR](https://flux.ai/lcsc/sn74ahct125dr~kfnt.md)

- Part Type: Buffers / Drivers
- JLCPCB Part Class: Extended Part
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/lcsc/1809051431\_Texas\-Instruments\-SN74AHCT125DR\_C155176\.pdf
- Role Details: SN74AHCT125DR quad buffer, LCSC C155176, for controller\-to\-5 V logic interfacing
- Package or Case Code: SOIC\-14\_L8\.7\-W3\.9\-P1\.27\-LS6\.0\-BL
- Role: Logic\-level Shifting
- Product Info Url: https://lcsc\.com/product\-detail/74\-Series\_TI\_SN74AHCT125DR\_SN74AHCT125DR\_C155176\.html
- Functional Group: Controller Logic Interface
- Manufacturer Part Number: SN74AHCT125DR
- Manufacturer Name: TI\(德州仪器\)
- LCSC Part Number: C155176

**Pins:**
- \~\{1OE\} [pin 1]
- \~\{2OE\} [pin 4]
- \~\{3OE\} [pin 10]
- \~\{4OE\} [pin 13]
- 1A [pin 2]
- 1Y [pin 3]
- 2A [pin 5]
- 2Y [pin 6]
- 3A [pin 9]
- 3Y [pin 8]
- 4A [pin 12]
- 4Y [pin 11]
- GND [pin 7]
- VCC [pin 14]

*The full schematic, PCB layout, bill of materials, and interactive design are available at [https://flux\.ai/brianbenchoff/days\-since\-counter\~ud](https://flux.ai/brianbenchoff/days-since-counter~ud).*

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