Fsk energymeter
luftaquila·fsk-energymeter·device/hardware/fsk-energymeter.kicad_pcb
About the Fsk energymeter PCB
Fsk energymeter is an open source STM32 PCB design by luftaquila, published on GitHub under the Custom license license. It is a 2-layer board measuring 90 × 74 mm, with 79 components from 43 distinct parts.
Its main chip is the STM32F401RCTx, from the STM32 family. Other key parts include the AMC3311QDWERQ1, L78L05ABUTR, NCP51460SN33T1G, LM2675MX-5.0/NOPB and LM324DR. By type, the board carries 39 capacitors, 24 resistors, 8 ICs, 3 diodes, 2 crystals and 1 connector.
From the project
E-Formula electric energy meter for Formula Student Korea
100 Hz data recording HV bus voltage HV bus current LV supply voltage Ambient (CPU) temperature Real-world time of each record USB Mass Storage data extraction Web-based data viewer
The data cable and the drive cable are two distinct cables. When driving the vehicle, connect the drive cable to the LV connector of the device. To extract data, disconnect the drive cable and connect the data cable instead.

Main components on the Fsk energymeter
Fsk energymeter bill of materials (BOM)
79 components, 43 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | AMC3311QDWERQ1 AMC3311QDWER | SOIC127P1030X265-16N | IC1 |
| 1 | L78L05ABUTR 78L05G-AB3-R | L78L05ABUTR | IC2 |
| 1 | NCP51460SN33T1G | SOT96P237X111-3N | IC3 |
| 1 | LM2675MX-5.0/NOPB LM2675MX-5.0_NOPB | SOIC127P600X175-8N | IC4 |
| 1 | LM324DR LMV324AIDR | SOIC-14_3.9x8.7mm_P1.27mm | U1 |
| 1 | TLV9001IDBVR TLV9001UIDBVR | SOT-23-5 | U3 |
| 1 | STM32F401RCTx | LQFP-64_10x10mm_P0.5mm | U4 |
| 1 | AMS1117-3.3 | AMS1117-3.3 | U5 |
| 1 | X322525MOB4SI | Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | Q13FC13500004 | Crystal_SMD_3215-2Pin_3.2x1.5mm | Y2 |
| 1 | TF-115-BCP9 Micro_SD_Card | TF115BCP9 | J4 |
| 1 | CR1220-2 CR1220 | S8411-45R_1 | BT1 |
| 1 | SS15 SS14 | D_SMA | D1 |
| 1 | XL-1608UGC-04 LED | LED_0603_1608Metric | D2 |
| 1 | BAT54C | SOT-23 | D3 |
| 1 | SMMS0650-101M 100uH | SMMS0650-101M | L1 |
| 3 | CL10B223KB8NNNC 22nF | C_0603_1608Metric | C1, C11, C16 |
| 3 | CL10A105KB8NNNC 1uF | C_0603_1608Metric | C2, C10, C19 |
| 2 | CL10B102KB8NNNC 1nF | C_0603_1608Metric | C3, C7 |
| 13 | CC0603KRX7R9BB104 0.1uF | C_0603_1608Metric | C4, C6, C8, C17, C21, C22, C23, C24 +5 |
Show 23 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | CL10C331JB8NNNC 330pF | C_0603_1608Metric | C5, C15 |
| 1 | CL21B334KBFNNNE 0.33uF | C_0805_2012Metric | C9 |
| 1 | CL10C101JB8NNNC 100pF | C_0603_1608Metric | C12 |
| 1 | CL31B102KGFNNNE 1nF | C_1206_3216Metric | C13 |
| 1 | CL31B105KBHNNNE 1uF | C_1206_3216Metric | C14 |
| 2 | CL10B103KB8NNNC 10nF | C_0603_1608Metric | C18, C25 |
| 3 | CL10A106MA8NRNC 10uF | C_0603_1608Metric | C20, C31, C33 |
| 1 | T491X476K035AT 47uF | CP_EIA-7343-43_Kemet-X | C26 |
| 1 | TAJD107K016RNJ 100uF | CP_EIA-7343-31_Kemet-D | C27 |
| 4 | CC0603KRX7R9BB104 20pF | C_0603_1608Metric | C28, C29, C34, C36 |
| 1 | CL10A475KO8NNNC 4.7uF | C_0603_1608Metric | C35 |
| 1 | 2k | R_0603_1608Metric | R1 |
| 1 | 3.9K 3.9k | R_0603_1608Metric | R2 |
| 7 | 10K 10k | R_0603_1608Metric | R3, R14, R17, R22, R23, R24, R25 |
| 4 | 3.3K 3.3k | R_0603_1608Metric | R4, R5, R7, R13 |
| 2 | 20K 20k | R_0603_1608Metric | R6, R8 |
| 2 | ARG06BTC1004 1M | R_1206_3216Metric | R9, R10 |
| 1 | ARG06FTC5603 560k | R_1206_3216Metric | R11 |
| 1 | ARG06DTC4303 430k | R_1206_3216Metric | R12 |
| 1 | 68K 68k | R_0603_1608Metric | R15 |
| 1 | 22K 22k | R_0603_1608Metric | R16 |
| 2 | 22 | R_0603_1608Metric | R18, R19 |
| 1 | 1k | R_0603_1608Metric | R20 |
Fsk energymeter design files
The KiCad project lives in the luftaquila/fsk-energymeter repository on GitHub; these links point at the commit this page was built from.
Fsk energymeter: common questions
What microcontroller does the Fsk energymeter use?
The Fsk energymeter is built around the STM32F401RCTx, from the STM32 family.
How big is the Fsk energymeter PCB?
The Fsk energymeter measures 90 × 74 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Fsk energymeter?
79 components, from 43 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 Fsk energymeter design files?
From the luftaquila/fsk-energymeter 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 Fsk energymeter design in my own project?
It is published under Custom license, which limits how it may be reused; read the license before building on it.
Can I test firmware for the Fsk energymeter without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.
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