This repo contains project files for a bench top power supply I designed for my home lab.
- Small for crammed work spaces
- Adjustable and designed to store values on each power cycle
- 2 layer board - V2.0 bumped to 4 layer
- Digitally controlled - no mechanical parts
- Clear annunciators
- Uses an external AC-DC converter
- At least a 2A max load
- Cover most logic levels
- Possibly have preset buttons
- KiCad - Schematic capture and layout V1.0
- VS Code | PlatformIO - Used to develop firmware V1.0
- Fusion 360 - Used to design 3-D models for packages
- Altium Designer - Schematic capture and layout V2.0
- STM32CubeIDE - Used to develop firmware V2.0
- The PCB uses a 5/5mil DRC constraint
- The top of the PCB acts as the product face plate
| Change Type | V 1.0 | V2.0 |
|---|---|---|
| MCU Architecture | 8-bit AVR | 32-bit ARM |
| User Input Handling | Polling | Interrupts |
| Analog Readings | Polling | DMA |
| Serial Communication | None | Added |
| Operating System | None | FREERTOS |
| Change Type | V 1.0 | V2.0 |
|---|---|---|
| MCU Selection | ATMega 328p | STM32F401RB |
| Digi Pot | MCP4023 - Up/Down | MCP4018 - I2C |
| Inductor Seletion | 4.7µH - 7A | 4.7µH - 4A |
| PCB Stackup | 2-layer | 4-layer |
| User Input Buffer | None | Schmitt triggered |
| Analog Buffers | LM358 - Not RRIO | TLV271 - RRIO |
| MCU VDD | Not always on | Always On |
| OLED Reset | None | Added |
- Aditya Sehgal - PCB Layout, Firmware, 3-D Modelling - Adsehgal