Bm7161
About the Bm7161 PCB
Bm7161 is an open source AVR/Arduino PCB design by jonnor, published on GitHub. It is a 2-layer board measuring 12 × 15.5 mm, with 15 components from 13 distinct parts.
Its main chip is the SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm_ThermalVias, from the AVR/Arduino family. By type, the board carries 9 capacitors, 2 connectors, 1 IC, 1 crystal and 1 inductor.
It belongs with the iot & wireless, sensors and power & battery designs in this gallery.
From the project
Notes on Machine Learning on edge for embedded/sensor/IoT uses
A computer with a modern GPU for machine learning is approx 1000 USD. The state-of-the-art ML models that in the mainstream attention are getting ever larger. Currently being led by Large Language Models and Generative Image models. Requiring more compute and RAM every year.
TinyML is a whole nother beast - with a focus on tiny models that can run on small,power-efficient and low-cost microcontrollers. Low cost enables massive scale.
Bm7161 bill of materials (BOM)
15 components, 13 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ~ | SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm_ThermalVias | U1 |
| 1 | 32MHz/12pF | Crystal_SMD_Abracon_ABM8G-4Pin_3.2x2.5mm | Y1 |
| 1 | Header 1 | MHDR1X1 | P1 |
| 1 | Header 4 | MHDR1X4 | P2 |
| 1 | Comment | 2.4G_B_6_4 | Designator16 |
| 1 | 3.3nH | L_0402_1005Metric | L1 |
| 1 | 0R | C_0402_1005Metric | C1 |
| 1 | 1.8pF | C_0402_1005Metric | C2 |
| 1 | N.C. | C_0402_1005Metric | C3 |
| 1 | 1pF | C_0402_1005Metric | C4 |
| 1 | 1uF | C_0402_1005Metric | C5 |
| 2 | 2.2uF | C_0402_1005Metric | C6, C9 |
| 2 | 10nF | C_0402_1005Metric | C7, C8 |
Bm7161 design files
The KiCad project lives in the jonnor/embeddedml repository on GitHub; these links point at the commit this page was built from.
Bm7161: common questions
What microcontroller does the Bm7161 use?
The Bm7161 is built around the SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm_ThermalVias, from the AVR/Arduino family.
How big is the Bm7161 PCB?
The Bm7161 measures 12 × 15.5 mm, has 2 copper layers and is 1 mm thick.
How many components are on the Bm7161?
15 components, from 13 distinct parts. The full bill of materials is listed on this page.
Where can I download the Bm7161 design files?
From the jonnor/embeddedml repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Bm7161 design in my own project?
The repository has no license, so all rights stay with jonnor. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Bm7161 without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.
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