This is an STM32 dev board that is designed to be put on a B6 ring binder notebook as covers. The board size is 130x180mm and contains 21 4mm ring holes.
Note: I did tried to follow best practices as much as possible while designing this board, but it is still intended to be used as a notebook cover. The devices fitted might not work to their fullest spec. Please exercise caution.
The front side is the devboard. Featuring:
- An STM32F103ZCT6 ARM-Cortex M3 Microcontroller in a 144-pin LQFP package
- External 16MHz crystal and 32.768kHz RTC crystal
- 2x IRS2003 H-Bridge Drivers with a pair of IRF7403 MOSFET (total of 2 drivers)
- 2x PM8834 MOSFET Drivers with two IRF7403 MOSFETs in an Open-Drain configuration (total of 4 drivers)
- 2x CD4050 Buffer for translating higher voltage logic inputs into STM32's 3.3v logic (total of 8 inputs)
- 40x IO pins breakout
- BOOT0/BOOT1 headers
- SWD headers
- Reset button
- LM2596S-3.3 Buck Converter
- Cute ponies
The back side is a PCB footprint reference guide. Featuring:
- Passive components (0201 to 1206)
- Electrolytic Capacitors (3mm to 10mm)
- JST connectors (GH, SH, PH, ...)
- Diodes (MELF, SMA, SMB, SOD123, SOD323, ...)
- Diode Bridges (ABS, MBS)
- Transistors (SOT23, SOT223, LFPAK56, DPAK, ...)
- Crystals (HC49, 0603 to 7050, 2 and 4 pins versions)
- SOICs (SOIC4, SOIC8, SOIC14, SOIC16)
- Wide SOICs (SOIC8W to SOIC28W)
- TSSOPs (TSSOP8 to TSSOP40)
- QFPs 0.5mm pitch (LQFP32 to LQFP144)
- DFNs 0.4mm and 0.5mm pitch (DFN6 to DFN44)
- QFNs 0.4mm pitch (QFN20 to QFN76)
- QFNs 0.5mm pitch (QFN12 to QFN72)
- More cute ponies
This board features a pair of 20-pin Slide-Lock FFP Connectors, one on each side. These connectors are there so you can add a 20-pin Same-Side FFC Cable to act as a notebook closing strap.
Hardware is licensed under SPDX-License-Identifier: Apache-2.0 WITH SHL-2.1
This project is a certified Open Source Hardware. OSHWA UID TH000006. https://certification.oshwa.org/th000006.html
- 3215 Crystal model by Sam Ma: https://grabcad.com/library/crystal-smd-3215-pin2-1
- Inductor model by Gydius: https://grabcad.com/library/inductor-wurth-elektronik-74437324100-1