I2C and 1-Wire Connection Setup
1:22
Planning a response.
Deciding on tool priority.
Navigating tool usage.
Structuring the plan.
Using Knowledge Base Tool.
Developing high-level plan steps.
- Normalize connectors/nets and confirm J1/J2 pin map; set Pin4 NC.
- Rewire DQ: [J2]:2↔[J1]:2 pass‑through; branch via R1=33Ω to DQ_PROTECTED with D1 TVS to GND; tie IC1:IO.
- Rewire I2C: [IC1]:SDA/SCL to J3 (Pin3 SDA, Pin4 SCL); add R2/R3=4.7k to 3V3.
- Add test pads TP1/TP2/TP3, clean portals, update notes.
- Run ERC/DRC and fix any net naming issues.
Started implementing a plan
#Goal
- Redraw the entire DS28E18-based 1-Wire to I2C node as specified: Place the I2C group with a 4-pin 2.54 mm THT header (J3) on the left with pin mapping: Pin1=3V3, Pin2=GND, Pin3=SDA, Pin4=SCL; position the DS28E18 adjacent to the header; and place the trunk connectors on the right using Phoenix Contact 1712805 (J1/J2) with the pin mapping: Pin1=TRUNK_VPLUS, Pin2=TRUNK_DQ, Pin3=GND, Pin4=NC. Maintain pass-through for VPLUS and DQ between J2 and J1. Integrate a 33 Ω series resistor on DQ with a TVS diode (PESD5V0S1BBN) to GND, add 4.7k I2C pull-ups to 3V3, and include test pads for DQ, 3V3, and GND. Ensure a clean schematic redraw by cleaning up net duplicates and validating ERC/DRC.
#Implementation plan
1. Normalize connectors and nets
1. Reconfigure J1 and J2 using Phoenix Contact 1712805 with the specified pin mapping: Pin1=TRUNK_VPLUS, Pin2=TRUNK_DQ, Pin3=GND, and Pin4=NC.
2. Update the 4-pin THT header (J3) with a 2.54 mm pitch and pin assignments: Pin1=3V3, Pin2=GND, Pin3=SDA, Pin4=SCL.
2. Rewire 1-Wire and I2C paths
1. Connect the DS28E18 so its IO pin connects through a 33 Ω resistor (R1) to the DQ protection net (DQ_PROTECTED), then branch to D1 (TVS diode) tied to GND.
2. Maintain the pass-through connection for VPLUS and DQ between J2 and J1.
3. Connect the DS28E18 power and ground appropriately, ensuring its VDD is supplied and connected to the 3V3 net when needed.
3. Implement and configure I2C group
1. Connect the I2C signals from DS28E18 to the THT header J3 where Pin3 and Pin4 are SDA and SCL respectively.
2. Place 4.7k pull-up resistors (R2 and R3) from SDA and SCL to 3V3 to meet I2C bus requirements.
4. Add test pads and finalize foundations
1. Add test pads for monitoring DQ_PROTECTED, 3V3, and GND nets.
2. Clean up net portals, remove duplicates, and reconnect all nets ensuring proper naming (TRUNK_VPLUS, TRUNK_DQ, DQ_PROTECTED, 3V3, GND, I2C_SDA, and I2C_SCL).
5. Validate design
1. Run ERC/DRC to verify proper connectivity and absence of errors.
2. Update the project description to reflect the left/right placement of the connectors and overall architecture.
#Success criteria
- The schematic is redrawn meeting the specified architecture with all connectors and components correctly placed and connected.
- DQ protection with a 33 Ω resistor and TVS diode, I2C pull-ups and pass-through connections are implemented as specified.
- ERC/DRC passes with no errors and the test pads for DQ, 3V3, and GND are correctly placed.
Working on your request...
1:05
Searching for components.
Dispatching Library tool to find: "1712805"
Dispatching Library tool to find: "2.54mm 1x4 through hole pin header"
Searching: "test point"
Creating search plan for: "1712805"
Creating search plan for: "test point"
Searching.
Searching.
Searching.
Searching.
Searching: "2.54mm 1x4 through hole pin header"
Searching: "test point"
Searching.
Searching.
Searching.
Searching: "1712805"
Finished searching for components.
added required connectors, bridge, passives, testpads
0:31
Started: adding DS28E18, connectors, passives, testpads
Using Schematic Tool.
Added 11 components
0:02
Added 2x 1712805 as J1, J2
Added 1x 215297-4 as J3
Added 1x DS28E18Q+T as IC1
Added 1x PESD5V0S1BBN as D1
Added 3x Generic Resistor as R1, R2, R3
Added 3x Generic Non-Plated Mounting Hole as Hole1, Hole2, Hole3
Execution stopped due to insufficient credits.
0:02
Using Schematic Tool.
Started: inspecting pins and wiring all nets
Ready.
Reviews
- Wirelessly connects nets on schematic. Used to organize schematics and separate functional blocks. To wirelessly connect net portals, give them same designator. #portaljharwinbarrozo43.0M
- Wirelessly connects power nets on schematic. Identical to the net portal, but with a power symbol. Used to organize schematics and separate functional blocks. To wirelessly connect power net portals, give them the same designator. #portal #powerjharwinbarrozo11.4M
- A generic fixed resistor for rapid developing circuit topology. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard resistor values: 1.0Ω 10Ω 100Ω 1.0kΩ 10kΩ 100kΩ 1.0MΩ 1.1Ω 11Ω 110Ω 1.1kΩ 11kΩ 110kΩ 1.1MΩ 1.2Ω 12Ω 120Ω 1.2kΩ 12kΩ 120kΩ 1.2MΩ 1.3Ω 13Ω 130Ω 1.3kΩ 13kΩ 130kΩ 1.3MΩ 1.5Ω 15Ω 150Ω 1.5kΩ 15kΩ 150kΩ 1.5MΩ 1.6Ω 16Ω 160Ω 1.6kΩ 16kΩ 160kΩ 1.6MΩ 1.8Ω 18Ω 180Ω 1.8KΩ 18kΩ 180kΩ 1.8MΩ 2.0Ω 20Ω 200Ω 2.0kΩ 20kΩ 200kΩ 2.0MΩ 2.2Ω 22Ω 220Ω 2.2kΩ 22kΩ 220kΩ 2.2MΩ 2.4Ω 24Ω 240Ω 2.4kΩ 24kΩ 240kΩ 2.4MΩ 2.7Ω 27Ω 270Ω 2.7kΩ 27kΩ 270kΩ 2.7MΩ 3.0Ω 30Ω 300Ω 3.0KΩ 30KΩ 300KΩ 3.0MΩ 3.3Ω 33Ω 330Ω 3.3kΩ 33kΩ 330kΩ 3.3MΩ 3.6Ω 36Ω 360Ω 3.6kΩ 36kΩ 360kΩ 3.6MΩ 3.9Ω 39Ω 390Ω 3.9kΩ 39kΩ 390kΩ 3.9MΩ 4.3Ω 43Ω 430Ω 4.3kΩ 43KΩ 430KΩ 4.3MΩ 4.7Ω 47Ω 470Ω 4.7kΩ 47kΩ 470kΩ 4.7MΩ 5.1Ω 51Ω 510Ω 5.1kΩ 51kΩ 510kΩ 5.1MΩ 5.6Ω 56Ω 560Ω 5.6kΩ 56kΩ 560kΩ 5.6MΩ 6.2Ω 62Ω 620Ω 6.2kΩ 62KΩ 620KΩ 6.2MΩ 6.8Ω 68Ω 680Ω 6.8kΩ 68kΩ 680kΩ 6.8MΩ 7.5Ω 75Ω 750Ω 7.5kΩ 75kΩ 750kΩ 7.5MΩ 8.2Ω 82Ω 820Ω 8.2kΩ 82kΩ 820kΩ 8.2MΩ 9.1Ω 91Ω 910Ω 9.1kΩ 91kΩ 910kΩ 9.1MΩ #generics #CommonPartsLibraryjharwinbarrozo1.5M
- A generic fixed capacitor ideal for rapid circuit topology development. You can choose between polarized and non-polarized types, its symbol and the footprint will automatically adapt based on your selection. Supported options include standard SMD sizes for ceramic capacitors (e.g., 0402, 0603, 0805), SMD sizes for aluminum electrolytic capacitors, and through-hole footprints for polarized capacitors. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard capacitor values: 1.0pF 10pF 100pF 1000pF 0.01uF 0.1uF 1.0uF 10uF 100uF 1000uF 10,000uF 1.1pF 11pF 110pF 1100pF 1.2pF 12pF 120pF 1200pF 1.3pF 13pF 130pF 1300pF 1.5pF 15pF 150pF 1500pF 0.015uF 0.15uF 1.5uF 15uF 150uF 1500uF 1.6pF 16pF 160pF 1600pF 1.8pF 18pF 180pF 1800pF 2.0pF 20pF 200pF 2000pF 2.2pF 22pF 20pF 2200pF 0.022uF 0.22uF 2.2uF 22uF 220uF 2200uF 2.4pF 24pF 240pF 2400pF 2.7pF 27pF 270pF 2700pF 3.0pF 30pF 300pF 3000pF 3.3pF 33pF 330pF 3300pF 0.033uF 0.33uF 3.3uF 33uF 330uF 3300uF 3.6pF 36pF 360pF 3600pF 3.9pF 39pF 390pF 3900pF 4.3pF 43pF 430pF 4300pF 4.7pF 47pF 470pF 4700pF 0.047uF 0.47uF 4.7uF 47uF 470uF 4700uF 5.1pF 51pF 510pF 5100pF 5.6pF 56pF 560pF 5600pF 6.2pF 62pF 620pF 6200pF 6.8pF 68pF 680pF 6800pF 0.068uF 0.68uF 6.8uF 68uF 680uF 6800uF 7.5pF 75pF 750pF 7500pF 8.2pF 82pF 820pF 8200pF 9.1pF 91pF 910pF 9100pF #generics #CommonPartsLibraryjharwinbarrozo1.5M
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- An electrical connector acting as reusable interface to a conductor and creating a point where external circuits can be connected.Terminal
- 47 kOhms ±5% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film #forLedBlinkjharwinbarrozo1.2M
- 10uF Capacitor Aluminum Polymer 20% 16V SMD 5x5.3mm #forLedBlink #commonpartslibrary #capacitor #aluminumpolymer #radialcanjharwinbarrozo1.2M
- Yellow 595nm LED Indication - Discrete 1.7V 1206 (3216 Metric) #forLedBlinkjharwinbarrozo1.1M
Properties
Pricing & Availability
Distributor | Qty 1 |
|---|---|
Arrow | $23.53–$41.96 |
Digi-Key | $35.26–$35.45 |
LCSC | $29.50–$31.70 |
Mouser | $41.96 |
TME | $0.21 |
Verical | $28.13–$39.49 |
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