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Created Spectrum Painter (markdown)

Bernd Herzog 2023-05-15 13:35:54 +02:00
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The Spectrum Painter app allows to "paint" an image or text in a way that it appears on the waterfall view.
### Options
* Center frequency
* VGA (Gain)
* Amplifier
* Loop
* Bandwidth
* Note that the default bandwidth of 8k5 Hz is too low in most cases (eg. when viewing multiple MHz).
* Duration of transmission
* Pause between transmissions when loop is active
### Images
* Place 24 bit .BMP files on the sd card in the folder SPECTRUM
* 16 and 32 bit .BMP should work as well, but are not testet.
* The resolution should be quite high for a good result. A width of 2048 pixels is not a problem.
* Use a power of 2 for the width for optimal result. (eg. 512 / 1024 / 2048 / ...)
![SCR_0000](https://github.com/eried/portapack-mayhem/assets/13151053/4f3ecb71-eb8f-4231-a0a5-21f593c43b8b)
![grafik](https://github.com/eried/portapack-mayhem/assets/13151053/0facc180-5474-4093-98a9-a983f8b93f43)
### Text
* Messages up to 300 characters are supported
![SCR_0003](https://github.com/eried/portapack-mayhem/assets/13151053/3ea539e7-baf7-4a77-8415-3aabe9bc6cea)
![Screenshot](https://github.com/eried/portapack-mayhem/assets/13151053/9b322883-6064-4b77-9a40-dcdf9098ee06)