Energy Meter Circuit Design
0:13
Chat History
Project
J8
If you’re doing Option 1 (no mains anywhere on the PCB), then J8 should represent an off-board “load-side mains” connector (i.e., where the switched hot and neutral leave the relay module and go to the load), purely for documentation / wiring reference.
Concretely, in the schematic:
- J7 = MAINS input (from wall): MAINS_L, MAINS_N (off-board wiring only)
- J8 = LOAD output (to appliance): LOAD_L, LOAD_N (off-board wiring only)
And the key rule: J8 should not connect to any low-voltage nets (5 V / 3V3 / GND / ADC signals). It just anchors the net names LOAD_L and LOAD_N so it’s unambiguous how the external relay module and load wiring are intended to be hooked up.
If you want it even clearer, rename/annotate J8 in its value/description to something like “OFFBOARD_LOAD_OUT (wiring only)”.
4 days
I want J8 to be the load output: rename its nets to LOAD_L and LOAD_N (wiring only).
4 days
0:51
Chat History
Project
J8
Considering.
Checking if I can make the changes for you.
Net Connections to be added
| Net | Connections |
|---|
Net Connections to be removed
| Net | Connections |
|---|
4 days
Updated 2 connections
0:13
Connected J8:Pin_1 to ^LOAD_L
Connected J8:Pin_2 to ^LOAD_N
4 days
Plan completed.
J6 7 - C9 P2
R2
Resistance
10kΩ
D1 K - R11 P2
D2 K - R12 P2
J6 7 - C9 P2
R13 P2 - R14 P2
R5
Resistance
10kΩ
R1
Resistance
10kΩ
R4
Resistance
10kΩ
R3
Resistance
10kΩ
R1 P2 - R2 P1
J6 7 - C9 P2
J3 1 - R1 P1
R3 P2 - R4 P1
R13 P2 - R14 P2
D2
D1
J5
Reviews
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Low-voltage energy meter front-end (ESP32 + ACS712 + 9VAC sense)
Properties
Pricing & Availability
Distributor | Qty 1 |
|---|---|
Arrow | $5.96–$8.68 |
Digi-Key | $7.08–$10.09 |
LCSC | $5.58–$6.50 |
Mouser | $13.97 |
TME | $6.93 |
Verical | $6.69–$13.72 |
Assets
Assets are files uploaded to this project which can be used in various ways.
Controls
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