Floating Copper Error Resolution

flux

0:03

Ho implementato il fix definitivo nello schema: RSHUNT ora è realmente in serie tra 5V / U6:IN+ e RELAY_COIL_HIGH_SENSE / U6:IN- / K1:A1, quindi la bobina del relè ha il percorso di alimentazione corretto e l’INA219 misura la caduta sullo shunt. Ho anche piazzato RSHUNT vicino a U6 e documentato la modifica in Relay / INA219 Shunt Fix.
Non ordinare ancora: dopo l’aggiunta dello shunt il PCB va riroutato/autoroutato perché la review segnala ancora airwire/overlap sul layout; non ho uno strumento affidabile qui per riscrivere manualmente le tracce. Le connessioni schematiche sono corrette, ma il layout deve tornare DRC-clean prima della produzione.
6 days
info2839201

info2839201

aggiungi al bom i pezzi nuovi
6 days

flux

2:12

Modifying BOM in Italian.

Reviewing the bill of materials.

Analyzing the schematic.

Searching for a component.

Searching library for: "Find a JLCPCB/LCSC stocked 0.22 ohm 1% 1206 SMD current sense resistor, at least 0.25W, suitable as INA219 relay coil shunt at about 70mA. Need MPN, manufacturer, LCSC/JLCPCB part number, package, power rating, tolerance."

Creating search plan for: "Find a JLCPCB/LCSC stocked 0.22 ohm 1% 1206 SMD current sense resistor, at least 0.25W, suitable as INA219 relay coil shunt at about 70mA. Need MPN, manufacturer, LCSC/JLCPCB part number, package, power rating, tolerance. --- MANDATORY search constraints (these MUST be applied to all searches): fieldCategories: ["core","manufacturer","specifications","availability","packaging"] facetFilters: ["part_type:Resistor"] hitsPerPage: 10"

Searching: "0.22 ohm 1206 SMD current sense resistor, 1% tolerance, >=0.25W, suitable as INA219 shunt at ~70mA"

Found 13 results.

Searching: "Find a JLCPCB/LCSC stocked 0.22 ohm 1% 1206 SMD current sense resistor, at least 0.25W, suitable as INA219 relay coil shunt at about 70mA. Need MPN, manufacturer, LCSC/JLCPCB part number, package, power rating, tolerance. --- MANDATORY search constraints (these MUST be applied to all searches): fieldCategories: ["core","manufacturer","specifications","availability","packaging"] facetFilters: ["part_type:Resistor"] hitsPerPage: 10"

Finished searching for a component.

Running multiple web searches.

Found 1 results.

Found 1 results.

Analyzing the schematic.

Fatto: ho aggiornato il BOM per il nuovo componente RSHUNT con un part JLC/LCSC concreto: YAGEO RL1206FR-070R22L, LCSC/JLCPCB C155692, 0.22Ω ±1%, 0.25W, 1206. Rimane comunque da fare il controllo finale in JLC, ma ora il nuovo shunt non è più solo “generic” nei dati BOM.
Controlla MPN mancanti
Esporta BOM CSV
Verifica prezzo stock
Esegui ERC/DRC
6 days

Set Manufacturer Part Number to "RL1206FR-070R22L" on RSHUNT, Set Manufacturer to "YAGEO" on RSHUNT, and 4 more changes

0:01

Set RSHUNT's Manufacturer Part Number to "RL1206FR-070R22L"

Set RSHUNT's Manufacturer to "YAGEO"

Set RSHUNT's LCSC Part Number to "C155692"

Set RSHUNT's JLCPCB Part Number to "C155692"

Set RSHUNT's Value to "0.22Ω"

Set RSHUNT's Description to "0.22Ω ±1% 0.25W 1206 SMD shunt resistor for INA219 relay coil current sense"

6 days
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Relay / INA219 Shunt Fix
Definitive schematic correction implemented for future orders:
  • Added RSHUNT as a 0.22 Ω, 1%, 0.25 W, SMD 1206 shunt resistor.
  • Connected RSHUNT:P1 to 5V, the same net as U6:IN+.
  • Connected RSHUNT:P2 to RELAY_COIL_HIGH_SENSE, the same net as U6:IN- and K1:A1.
  • Relay low-side drive remains unchanged: K1:A2 connects to RELAY_COIL_LOW, with D1:anode and Q1:C.
  • Q1:E remains on GND; Q1:B remains driven through R1 with R2 pulldown.
  • Flyback diode orientation remains correct: D1:cathode on 5V, D1:anode on RELAY_COIL_LOW.
Correct topology:
Text
5V / U6:IN+ -> RSHUNT -> RELAY_COIL_HIGH_SENSE / U6:IN- / K1:A1
K1:A2 -> Q1:C
Q1:E -> GND
D1 cathode -> 5V side
D1 anode -> relay low side
With an estimated relay coil current of about 70 mA:
  • Shunt drop: 0.07 A × 0.22 Ω ≈ 15 mV
  • Shunt power: 0.07² × 0.22 ≈ 1.1 mW
  • 0.25 W rating is ample.
Layout note:
RSHUNT has been placed near U6 to keep the INA219 sense loop short. Before manufacturing, reroute the PCB so the new physical current path is implemented: 5V -> RSHUNT -> RELAY_COIL_HIGH_SENSE -> K1:A1. The current review still reports layout routing issues after adding/moving the shunt, so do not manufacture until routing is updated and DRC is clean again.

Documents

    Project Specification

    Design Notes

    Relay / INA219 Shunt Fix

Assets

Assets are files uploaded to this project which can be used in various ways.

12-24 -> esp controller thumbnail
Golf ball dispenser controller with protected 12V-24V DC input, LM2596 5V buck, ESP32 control, INA219 relay-coil sensing, and dry-contact relay output.

Properties

Properties describe core aspects of the project.

Pricing & Availability

Distributor

Qty 1

Arrow

$6.08–$9.50

Digi-Key

$25.76–$27.71

LCSC

$5.21–$5.34

Mouser

$13.99–$14.05

TME

$10.13

Verical

$4.35–$8.42

Controls