STM32L496RG breakout
Bring-up notes and scope captures on GitHub
An STM32L496RG breakout board, with buffered I²C bus, CAN through a protected transceiver, and SWD with SWO trace. Timer/PWM, NRST, and SPI pins are also broken out to a 7-pin header. Verified on the scope after assembly.
- Stackup
- 4 layer, two internal ground planes
- Components
- 57
- Fabrication
- JLCPCB, hand assembled
Onboard computer
LED Blink and more details on GitHub
An STM32F103-based onboard computer, containing power circuitry, JTAG header, and a buffered I²C bus. First board I took from schematic through to a working blink.
- Stackup
- 2 layer
- Components
- 32
- Fabrication
- JLCPCB, hand assembled
3V3 buck converter
Design and ripple measurement on GitHub
A 3V3 buck around an LMR50410, designed to hold output ripple under 100 mV.
- Stackup
- 2 layer
- Components
- 9
- Output
- 3.3 V, ripple around 36 mV Pk-Pk