Meter
About the Meter PCB
Meter is an open source PCB design by hicancan, published on GitHub under the AGPL-3.0 license. It is a 2-layer board measuring 75 × 45 mm, with 39 components from 23 distinct parts.
Other key parts include the ATM90E26-YU and ISO6741DWR. By type, the board carries 8 capacitors, 6 resistors, 3 connectors, 2 ICs and 1 crystal.
From the project
CARBENTRA smart plug: AIoT edge device for campus energy orchestration
Development candidate. Do not fabricate for energization or connect to mains. This revision contains a genuine schematic and fully connected PCB candidate, including the load-current shunt and both isolation barriers. Electrical continuity and DRC do not establish safety, measurement accuracy or manufacturing readiness.
- 39 electrical components and four M2 mounting holes, 75 × 45 × 1.6 mm board - ATM90E26-YU, calibrated L-only SPI metering, 8.192 MHz crystal and specified decoupling/reset/filter networks - Bourns CSS4J-4026R-1L00FE four-terminal 1 mΩ shunt with separate force and sense…
Main components on the Meter
Meter bill of materials (BOM)
39 components, 23 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ATM90E26-YU | SSOP-28_5.3x10.2mm_P0.65mm | U1 |
| 1 | ISO6741DWR | ISO6741_DW_8p1 | U2 |
| 1 | 8.192MHz CL18pF | Crystal_SMD_HC49-SD | Y1 |
| 1 | PROTECTED L / TO RELAY | TerminalBlock_Phoenix_MKDS-3-2-5.08_1x02_P5.08mm_Horizontal | J1 |
| 1 | N SENSE / NC | TerminalBlock_Phoenix_MKDS-3-2-5.08_1x02_P5.08mm_Horizontal | J2 |
| 1 | CONTROLLER - ISOLATED | PinHeader_1x08_P2.54mm_Vertical | J3 |
| 4 | 100nF 16V | C_0805_2012Metric | CI1, CI2, CP2, CP4 |
| 1 | 10uF 16V | C_0805_2012Metric | CP1 |
| 1 | 10uF 10V | C_0805_2012Metric | CP3 |
| 2 | 33nF 16V | C_0805_2012Metric | CV1, CV2 |
| 2 | 27pF C0G | C_0805_2012Metric | CX1, CX2 |
| 1 | R05CT05S-R / 3.3V | R05CT05S_8p1 | PS1 |
| 1 | 1mR / 1% / 8W | CSS4J_4026 | RS1 |
| 4 | 249K 249k | R_1206_3216Metric | RV1, RV2, RV3, RV4 |
| 3 | 1k | R_0805_2012Metric | RV5, RV6, RV7 |
| 2 | 330nF 16V | C_0805_2012Metric | C1, C2 |
| 3 | 100nF 16V | C_0805_2012Metric | C3, C4, C8 |
| 1 | 10uF 10V | C_0805_2012Metric | C5 |
| 1 | 1uF 16V | C_0805_2012Metric | C6 |
| 1 | 1nF C0G | C_0805_2012Metric | C7 |
Show 3 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | 100R | R_0805_2012Metric | R1, R2 |
| 1 | 0R | R_0805_2012Metric | R3 |
| 3 | 10K 10k | R_0805_2012Metric | R4, R5, R6 |
Meter design files
The KiCad project lives in the hicancan/carbentra-smart-plug repository on GitHub; these links point at the commit this page was built from.
Meter: common questions
How big is the Meter PCB?
The Meter measures 75 × 45 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Meter?
39 components, from 23 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Meter design files?
From the hicancan/carbentra-smart-plug repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Meter design in my own project?
Yes, under the terms of its AGPL-3.0 license, which hicancan chose for the repository.
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