OSSI CM1
About the OSSI CM1 PCB
OSSI CM1 is an open source PCB design by transistorgrab, published on GitHub under the MIT license. It is a 4-layer board measuring 49.5 × 54.9 mm, with 75 components from 23 distinct parts.
Other key parts include the P and LM75B. By type, the board carries 38 resistors, 24 capacitors, 4 crystals, 3 ICs, 1 diode and 1 inductor.
It belongs with the power & battery designs in this gallery.
From the project
Open Source Solar Inverter - Software, Hardware, Mechanics
This repository initially clones all content from the former Sourceforge hosted project site (https://sourceforge.net/projects/os-si/). Since the outages on Sourceforge became more frequent, I decided to change over to Github which seems more reliable at this time.
This project aims to build an Open Source (Software and Hardware) Solar Inverter.
The goal is to design a solar inverter with parts that are available trough common distributors with no special manufactured parts.
Main components on the OSSI CM1
OSSI CM1 bill of materials (BOM)
75 components, 23 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | P KV30F_64LQFP M | LQFP-64_10x10_Pitch0.5mm | U102 |
| 1 | LM75B | SOIC8 | U103 |
| 1 | P OPA2317 M | SOIC8 | U104 |
| 1 | P PINHEADER_2×5 M | PinHeader_2x05_P2.54mm_Vertical | X101 |
| 1 | Conn_01x20_Pin | PinHeader_1x20_P2.54mm_Vertical | X201 |
| 1 | Conn_01x21_Pin | PinHeader_1x21_P2.54mm_Vertical | X202 |
| 1 | P 10MHz M | HC49_US | Y101 |
| 2 | P LED M | 0603_W_LED | H140, H141 |
| 1 | Solder_bridge_open | JUMPER_OPEN | RESET0 |
| 1 | STARPOINT | STARPOINT | STAR101 |
| 1 | P LM4030 Texas Instruments | SOT-23-5 | D101 |
| 1 | P Ferrite M | 0805_W | L101 |
| 2 | P 12p M | 0603_W | C101, C102 |
| 9 | P 10n M | 0603_W | C103, C104, C105, C106, C107, C109, C110, C112 +1 |
| 8 | P 100n M | 0603_W | C108, C111, C113, C115, C116, C117, C120, C122 |
| 5 | P 1µ/6.3V M | 0805_W | C114, C118, C121, C123, C124 |
| 3 | P 10k M | 0603_W | R101, R111, R136 |
| 28 | P 220 M | 0603_W | R102, R103, R104, R105, R106, R107, R108, R109 +20 |
| 1 | P 1M0 M | 0603_W | R110 |
| 1 | P 0R0 M | 0603_W | R116 |
Show 3 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | P 4k7 M | 0603_W | R127, R128 |
| 1 | P 3k3 M | 0603_W | R129 |
| 2 | P 1k0 M | 0603_W | R132, R133 |
OSSI CM1 design files
The KiCad project lives in the transistorgrab/OSSI repository on GitHub; these links point at the commit this page was built from.
OSSI CM1: common questions
How big is the OSSI CM1 PCB?
The OSSI CM1 measures 49.5 × 54.9 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the OSSI CM1?
75 components, from 23 distinct parts. The full bill of materials is listed on this page.
Where can I download the OSSI CM1 design files?
From the transistorgrab/OSSI repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the OSSI CM1 design in my own project?
Yes, under the terms of its MIT license, which transistorgrab chose for the repository.
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