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Water Meter RWM-1

2 months ago 31
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SS494B Hall effect input to dual op-amp schmidt trigger to Arduino inturrupt input. i2c LCD, FRAM memory, and RS485 Modbus to home automation system.


Main Schematic

RWM-1 v1.1

RWM-1v 1.3


ID Name Designator Footprint Quantity Manufacturer Part Manufacturer Supplier Supplier Part Price LCSC Assembly Mounted BOM_Manufacturer Part BOM_Supplier BOM_Manufacturer BOM_Supplier Part
1 1k R1 AXIAL-0.3 1
2 1M R3 AXIAL-0.3 1
3 10k R4,R5,R7 AXIAL-0.3 3
4 30k R6 AXIAL-0.3 1
5 4700pF C2 RAD-0.1 1
6 IIC LCD H2 DIP-1X4P2.54 1 220S-1*4P H=8.5MM Ytype Gold-plated LCSC Ckmtw C124413
7 COMM 485 H3 DIP-1X4P2.54 1 220S-1*4P H=8.5MM Ytype Gold-plated LCSC Ckmtw C124413
8 IIC FRAM H1 HDR-8X1/2.54 1 Female headerHDR1X8-2.54 LCSC BOOMELE C27438
9 FRAM ADDR J1 HDR-TH_6PIN-V-ROW2-COL3-MALE-PITCH2.54 1 Header-Male-2.54_2x3 LCSC BOOMELE C65114
10 HALL SS494B P1 HDR-3X1/2.54 1 Header-Female-2.54_1x3 LCSC Boom Precision Elec C146243
11 Pulse LED2 LED-3MM/2.54 1 204-10SURD/S530-A3 LCSC EVERLIGHT C99772
12 Power LED1 LED-3MM/2.54 1 204-10SURD/S530-A3 LCSC EVERLIGHT C99772
13 470u C1 CAP-D8.0XF3.5 1
14 470 R9,R8 AXIAL-0.3 2
15 UNO_R3 P2 UNO_R3 1
16 Reset B1 KEY-6.0*6.0-2 1 button6*6*8 LCSC ReliaPro C59982
17 20K R2 RES-ADJ-TH_3PIN-V-L9.50-W4.85-PITCH2.50 1 3296W-1-203 LCSC Chengdu Guosheng Tech C118936
18 LM358N U1 PDIP-8 1 LM358N LCSC Texas Instruments C83405


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