2 layers37 × 19 mm
Passive rpi hub75-adapter
hzeller/rpi-rgb-led-matrix
Controlling up to three chains of 64x64, 32x32, 16x32 or similar RGB LED displays using Raspberry Pi GPIO
2 parts4.4kGPL-2.0
2 layers
Solar
szbeni/solar35Solar MPPT charge controller and van management system
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 2
- Nets
- 51
- Pads
- 51
- Tracks, vias
- 0, 0
- Routed
- Not yet
- KiCad
- KiCad 5 (file 20171130)
- Created
- 27 Jul 2019
- Updated
- 16 Nov 2022
Overview
Solar is an open-source printed circuit board by szbeni, from the szbeni/solar repository on GitHub. It is a 2-layer board with 2 parts on 51 nets.
It is built around the IRF2204PBF. Its parts include 1 IC and 1 transistor. It belongs with the power boards and the STM32 boards of this library.
Main components
1README
README.mdMppt Solar Charge Controller
An MPPT solar charge controller for a caravan. Hardware, Firmware, Webapp for visualization
Hardware main parts:
- Schematic PDF download
- No PCB design so far, just a working prototype on breadboard
- STM32 MCU (bluepill STM32F103)
- SZBK07 DCDC module (LM25116 DCDC driver chip and other electroics removed just power electronic parts used)
- 250W solar panel 36V nominal voltage
- Split charge relay for charging from engine, when driving (separate from this circuit)
- 55Ah and 110Ah 12V leisure batteries in parallel
- 3x ACS712 current sensors
- ADS1115 ADC for current measurement
- FAN for cooling power electronics
- Bluetooth UART module for communnication
Firmware:
- Written in C
- STCubeMX generated base project + user code
- 50Hz controlling loop
- DCDC half bridge controlling via complementary PWM signals
- MPPT tracking, float charging
- simple ASCII UART protocol for communication
- active PWM fan control when power is high
Webapp:
- Python3 based
- Flexx UI
- For visualization and active control of the firmware
- Connection via bluetooth
- Could be running on a raspberry PI
Android app
- There is an initial release of the android app, it is working but not perfect
Parts
2| Qty | Value | Footprint | References |
|---|---|---|---|
| 1 | IRF2204 | Package_TO_SOT_THT:TO-220-3_Vertical | Q1 |
| 1 | STM32F103C8Tx | Package_QFP:LQFP-48_7x7mm_P0.5mm | U1 |
Questions
What parts does the Solar use?
2 parts, built around the IRF2204PBF. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Solar KiCad files?
From the szbeni/solar repository on GitHub, at the commit this page was made from: the board is hw/solar/solar.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Solar design in my own project?
Its repository states no licence, so its author keeps all rights: ask szbeni before reusing the design.
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