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How to build a hybrid solar/wind energy harvester?

Archives for May 2014

Green4 charge controller: wiring diagrams part 2

Wiring diagram: wind turbine to dump load In contrast to solar panels, a wind turbine can’t be disconnected in case it generates too much power. We need to brake it by attaching a load to it. However, wind power can’t always flow through the charge controller: high volts and/or amps might damage the internal circuitry […]

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Green4 charge controller: wiring diagrams part 1

Introduction Instead of endlessly listing requirements and specifications, we prefer to demonstrate the architecture of our Green4 charge controller by means of wiring diagrams and other illustrations. The Green4 is designed to be a versatile device that enables you to evaluate different charge controller architectures. Call it a charge controller emulator. There are several reasons […]

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Open source implementations of malloc

On (very) small embedded systems without a full OS (e.g. because there is only a scheduler), one can (and should) usually live without dynamic memory allocation. But sometimes, it is really needed or it is just more convenient. It is possible to write your own simple dynamic allocator on top of a pre-defined memory region, […]

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