HardLabs

SolarChargerSZBK07ModuleV2

farmerkeith·SolarChargerSZBK07ModuleV2·schematic_30/SZBK07.sch

This repository ships a schematic but no board layout.

About the SolarChargerSZBK07ModuleV2 PCB

SolarChargerSZBK07ModuleV2 is an open source AVR/Arduino PCB design by farmerkeith, published on GitHub. It is a board, with 7 components from 6 distinct parts.

Its main chip is the ArduinoNano, from the AVR/Arduino family. Other key parts include the SZBK07_DC-DC_module, AD822A and MP2307_DC-DC_module. By type, the board carries 4 ICs and 3 transistors.

It belongs with the power & battery designs in this gallery.

From the project

Hardware and software for an MPPT solar charger. It uses an SZBK07 DC converter module, a MOSFET diode. The main software is in the form of an MPPT library header file.

There are 2 versions of the schematic. The original design was suitable for a 60-cell solar panel with an MPP voltage of 30 volts. The additional version is suitable for a 36-cell solar panel with an MPP voltage of 18 volts. The difference is in the design of the MOSFET diode, which in the original design uses an N-channel MOSFET and relies on there being a significant voltage difference between the panel voltage and the battery voltage. The second design uses a P-channel MOSFET and derives its bias voltage from ground, and so does not rely on panel voltage.

Main components on the SolarChargerSZBK07ModuleV2

SZBK07_DC-DC_moduleAD822AMP2307_DC-DC_moduleArduinoNano

SolarChargerSZBK07ModuleV2 bill of materials (BOM)

7 components, 6 distinct parts.

QtyPartRefs
1
SZBK07_DC-DC_module
U1
1
AD822A
U2
1
MP2307_DC-DC_module
U3
1
ArduinoNano
U4
2
2N7000
Q1, Q2
1
PSMN3R3-80PS
Q3

SolarChargerSZBK07ModuleV2 design files

The KiCad project lives in the farmerkeith/SolarChargerSZBK07ModuleV2 repository on GitHub; these links point at the commit this page was built from.

SolarChargerSZBK07ModuleV2: common questions

What microcontroller does the SolarChargerSZBK07ModuleV2 use?

The SolarChargerSZBK07ModuleV2 is built around the ArduinoNano, from the AVR/Arduino family.

How many components are on the SolarChargerSZBK07ModuleV2?

7 components, from 6 distinct parts. The full bill of materials is listed on this page.

Where can I download the SolarChargerSZBK07ModuleV2 design files?

From the farmerkeith/SolarChargerSZBK07ModuleV2 repository on GitHub, which has the schematic and a netlist; the links under Design files point to each one.

Can I use the SolarChargerSZBK07ModuleV2 design in my own project?

The repository has no license, so all rights stay with farmerkeith. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the SolarChargerSZBK07ModuleV2 without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.

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