23 lines
1.1 KiB
Markdown
23 lines
1.1 KiB
Markdown
# isolated-switches
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Small PCB that can be directly mounted onto the Raspberry Pi's pin header. Isolating GPIO 24 using an optocoupler.
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Included is a rust program to to switch on or off a PV inverter based on the voltage of the battery bank.
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## hardware design
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The hardware design was done using the open source EDA KiCAD 10.0 based on a 2.54mm prototype board.
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Used components:
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- 2x20 pin socket header
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- 200Ohm metal film resistor (2.5mmx6.3mm)
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- optocoupler PC817
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- output connector: 2-pin JST XH board connector
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- 20x16 hole 2.54mm prototype board
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## software
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As a sample implementation, there is a rust program included that is switching a PV inverter on and off based on the voltage of the battery bank.
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The data is read from a database that is updated regularly using [VE.Direct-Text-Reader](https://git.schauaus.at/VE-Tools/VE.Direct-Text-Reader).
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The actual control the pin is done using the crate [rppal](https://github.com/golemparts/rppal).
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Developed and tested on a Raspberry Pi 5, with Raspberry Pi OS running rustc and cargo version 1.96.0.
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